{"id":258,"date":"2026-06-10T06:23:02","date_gmt":"2026-06-10T06:23:02","guid":{"rendered":"https:\/\/web.fs.uni-lj.si\/lft\/?page_id=258"},"modified":"2026-08-29T17:58:16","modified_gmt":"2026-08-29T17:58:16","slug":"preracuni","status":"publish","type":"page","link":"https:\/\/web.fs.uni-lj.si\/lft\/preracuni\/","title":{"rendered":"Prera\u010duni"},"content":{"rendered":"<div class=\"et_pb_section_0 et_pb_section et_section_regular et_block_section\">\n<div class=\"et_pb_row_0 et_pb_row et_block_row\">\n<div class=\"et_pb_column_0 et_pb_column et_pb_column_4_4 et-last-child et_block_column et_pb_css_mix_blend_mode_passthrough\">\n<div class=\"et_pb_code_0 et_pb_code et_pb_module\"><div class=\"et_pb_code_inner\"><div id=\"kalkulator\" style=\"width:80%; margin:auto;\">\n<script>\n  \/\/ Shared helper used by every calculator's \"Izbri\u0161i vhodne podatke\" button:\n  \/\/ clears each listed input field and the displayed result.\n  function lftClear(inputIds, resultId) {\n    inputIds.forEach(function(id) {\n      var el = document.getElementById(id);\n      if (el) el.value = \"\";\n    });\n    var result = document.getElementById(resultId);\n    if (result) result.innerHTML = \"\";\n  }\n<\/script>\n<br>\n<h1 id=\"C0\" class=\"et_pb_module_header\" style=\"font-size:30px; font-weight:500; color:#333333;\">LFT Kalkulator<\/h1>\n<p style=\"font-size:18px; font-weight:400; color:#555555; margin-top:0;\">V LABORATORIJU ZA FLUIDNO TEHNIKO SMO ZA VAS PRIPRAVILI INTERAKTIVNO SPLETNO STRAN NAJPOGOSTEJE UPORABLJENIH IZRA\u010cUNOV V HIDRAVLIKI IN PNEVMATIKI:<\/p>\n<span style=\"font-size:1em; font-weight:bold\">\n<p><a href=\"#C0\">0. Osnovni prera\u010dun tlaka p, sile F, povr\u0161ine A<\/a><\/p>\n<p><a href=\"#C1\">1. Tok kapljevine Q<sub>\u010c<\/sub>, ki ga \u010drpalka tla\u010di v tla\u010dni vod<\/a><\/p>\n<p><a href=\"#C2\">2. Potrebna mo\u010d motorja P<sub>M<\/sub>, ki poganja \u010drpalko (\u010c) \u2013 (mo\u010d na pogonski gredi \u010drpalke)<\/a><\/p>\n<p><a href=\"#C3\">3. Potreben vrtilni navor motorja M<sub>M<\/sub>, ki poganja \u010drpalko<\/a><\/p>\n<p><a href=\"#C4\">4. Potrebna oziroma dopustna iztisnina \u010drpalke q<sub>\u010c<\/sub><\/a><\/p>\n<p><a href=\"#C5\">5. Izkoristek hidrostati\u010dne enote (HSE) \u2013 \u010drpalke (\u010c) oziroma hidravli\u010dnega motorja (HM)<\/a><\/p>\n<p><a href=\"#C6\">6. Izra\u010dun toka kapljevine Q<sub>HM<\/sub> na vto\u010dni strani HM<\/a><\/p>\n<p><a href=\"#C7\">7. Izra\u010dun iztisnine q<sub>HM<\/sub>, \u010de poznamo zahtevane vrtljaje HM (n<sub>HM<\/sub>) in razpolo\u017eljiv Q<sub>HM<\/sub> (= Q<sub>HM vtok<\/sub>)<\/a><\/p>\n<p><a href=\"#C8\">8. Vrtilni navor M<sub>HM<\/sub>, ki ga daje HM na izstopni gredi (ob konstantnem \u0161tevilu vrtljajev: n<sub>HM<\/sub> =\nkonst., torej: a [m\/s<sup>2<\/sup>] = 0)<\/a><\/p>\n<p><a href=\"#C9\">9. Izra\u010dun vrtljajev n<sub>HM<\/sub>, \u010de poznamo tok Q<sub>HM<\/sub> in iztisnino q<sub>HM<\/sub><\/a><\/p>\n<p><a href=\"#C10\">10. Izstopna mo\u010d P<sub>iHM<\/sub> (na izstopni gredi) HM<\/a><\/p>\n<p><a href=\"#C11\">11. Izra\u010dun notranjega premera cevnega voda d<sub>n<\/sub><\/a><\/p>\n<p><a href=\"#C12\">12. Izra\u010dun linijskih izgub po ceveh<\/a><\/p>\n<p><a href=\"#C13\">13. Izra\u010dun notranjega pu\u0161\u010danja v hidrostati\u010dni re\u017ei (cilindri\u010dni bat v cilindri\u010dni izvrtini)<\/a><\/p>\n<p><a href=\"#C14\">14. Izra\u010dun volumna hidravli\u010dnega akumulatorja (HA)<\/a><\/p>\n<p><a href=\"#C15\">15. Hertzov tlak: kroglica-kroglica<\/a><\/p>\n<p><a href=\"#C16\">16. Hertzov tlak: kroglica-ravnina<\/a><\/p>\n<p><a href=\"#C17\">17. Hertzov tlak: valj\u010dek-valj\u010dek<\/a><\/p>\n<p><a href=\"#C18\">18. Hertzov tlak: valj\u010dek-ravnina<\/a><\/p>\n<p><a href=\"#C19\">19. Prilaga A: Jeklene cevi za cevne navoje<\/a><\/p>\n<\/span>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C0\">0. Osnovni prera\u010dun tlaka p, sile F, povr\u0161ine A:<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba0_a.png\" alt=\"enacba0a\" width=\"auto\" height=\"100\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s0_a.png\" alt=\"slika0a\" width=\"auto\" height=\"105\">\n<table>\n  <tbody><tr>\n    <td>\n\n  <br><b>Tlak p<\/b> [bar]=? <br><br>\n  Sila F [N]:<br>\n   <input type=\"text\" id=\"txt01a\" name=\"text01a\" style=\"font-size:12pt\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n  <br>\n  Premer D [mm]:<br>\n    <input type=\"text\" id=\"txt01b\" style=\"font-size: 12pt\" name=\"text01b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n  <p id=\"demo01\"><b>p<\/b> = 254.65 [bar]<\/p>\n        <script>\n      function myFunction01() {\n        var x01 = document.getElementById(\"txt01a\").value;\n        var y01 = document.getElementById(\"txt01b\").value;\n        var rez01 = Number(x01)\/(Math.PI*Math.pow(Number(y01),2)\/4)*10     ;\n        var rez01 = rez01.toFixed(2)\n        document.getElementById(\"demo01\").innerHTML = \"<b>p<\/b> = \"+ rez01 + \" \" + \"[bar]\";\n      }\n\n      function Clear01() { lftClear(['txt01a', 'txt01b'], 'demo01'); }\n    <\/script>\n    <button onclick=\"myFunction01()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear01\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear01()\">\n\t<br>\n     <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n\n\t<\/td>\n    <td>\n\n  <br> <b>Sila F <\/b> [N]=? <br><br>\n   Tlak p [bar]:<br>\n   <input type=\"text\" id=\"txt02a\" name=\"text02a\" style=\"font-size:12pt\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n  <br>\n    Premer D [mm]:<br>\n\t<input type=\"text\" id=\"txt02b\" style=\"font-size: 12pt\" name=\"text02b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n  <p id=\"demo02\"><\/p>\n        <script>\n      function myFunction02() {\n        var x02 = document.getElementById(\"txt02a\").value;\n        var y02 = document.getElementById(\"txt02b\").value;\n        var rez02 = Number(x02)*(Math.PI*Math.pow(Number(y02),2)\/4)\/10;\n        var rez02 = rez02.toFixed(2)\n        document.getElementById(\"demo02\").innerHTML = \"<b>F<\/b> = \"+ rez02 + \" \" + \"[N]\";\n      }\n\n      function Clear02() { lftClear(['txt02a', 'txt02b'], 'demo02'); }\n    <\/script>\n    <button onclick=\"myFunction02()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear02\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear02()\">\n\t<br>\n     <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n\n\t<\/td>\n    <td>\n\n  <br> <b>Premer D <\/b> [mm]=? <br><br>\n  Sila F [N]:<br>\n   <input type=\"text\" id=\"txt03a\" name=\"text03a\" style=\"font-size:12pt\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n  <br>\n  Tlak p [bar]:<br>\n    <input type=\"text\" id=\"txt03b\" style=\"font-size: 12pt\" name=\"text03b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n  <p id=\"demo03\"><\/p>\n        <script>\n      function myFunction03() {\n        var x03 = document.getElementById(\"txt03a\").value;\n        var y03 = document.getElementById(\"txt03b\").value;\n        var rez03 = Math.sqrt(4*10*Number(x03)\/(Number(y03)*Math.PI));\n        var rez03 = rez03.toFixed(2)\n        document.getElementById(\"demo03\").innerHTML = \"<b>D<\/b> = \"+ rez03 + \" \" + \"[mm]\";\n      }\n\n      function Clear03() { lftClear(['txt03a', 'txt03b'], 'demo03'); }\n    <\/script>\n    <button onclick=\"myFunction03()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear03\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear03()\">\n\t<br>\n     <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n\n\t<\/td>\n  <\/tr>\n<\/tbody><\/table>\n\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba0_b.png\" alt=\"enacba0b\" width=\"auto\" height=\"100\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s0_b.png\" alt=\"slika0b\" width=\"auto\" height=\"105\">\n\t<table>\n  <tbody><tr>\n    <td>\n  <br><b>Tlak p<\/b> [bar]=? <br><br>\n  Sila F [N]:<br>\n   <input type=\"text\" id=\"txt04a\" name=\"text04a\" style=\"font-size:12pt\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n  <br>\n  Premer D [mm]:<br>\n    <input type=\"text\" id=\"txt04b\" style=\"font-size: 12pt\" name=\"text04b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n<br>\n  Premer d [mm]:<br>\n    <input type=\"text\" id=\"txt04c\" style=\"font-size: 12pt\" name=\"text04c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n\n  <p id=\"demo04\"><\/p>\n        <script>\n      function myFunction04() {\n        var x04 = document.getElementById(\"txt04a\").value;\n        var y04 = document.getElementById(\"txt04b\").value;\n\t\tvar z04 = document.getElementById(\"txt04c\").value;\n        var rez04 = Number(x04)\/(Math.PI*Math.pow(Number(y04),2)\/4-Math.PI*Math.pow(Number(z04),2)\/4)*10     ;\n        var rez04 = rez04.toFixed(2)\n        document.getElementById(\"demo04\").innerHTML = \"<b>p<\/b> = \"+ rez04 + \" \" + \"[bar]\";\n      }\n\n      function Clear04() { lftClear(['txt04a', 'txt04b', 'txt04c'], 'demo04'); }\n    <\/script>\n    <button onclick=\"myFunction04()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear04\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear04()\">\n\t<br>\n     <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n\n\t<\/td>\n    <td>\n\n\t  <br><b>Sila F<\/b> [N]=? <br><br>\n  Tlak p [bar]:<br>\n   <input type=\"text\" id=\"txt05a\" name=\"text05a\" style=\"font-size:12pt\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n  <br>\n  Premer D [mm]:<br>\n    <input type=\"text\" id=\"txt05b\" style=\"font-size: 12pt\" name=\"text05b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n<br>\n  Premer d [mm]:<br>\n    <input type=\"text\" id=\"txt05c\" style=\"font-size: 12pt\" name=\"text05c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n\n  <p id=\"demo05\"><\/p>\n        <script>\n      function myFunction05() {\n        var x05 = document.getElementById(\"txt05a\").value;\n        var y05 = document.getElementById(\"txt05b\").value;\n\t\tvar z05 = document.getElementById(\"txt05c\").value;\n        var rez05 = Number(x05)*(Math.PI*Math.pow(Number(y05),2)\/4-Math.PI*Math.pow(Number(z05),2)\/4)\/10     ;\n        var rez05 = rez05.toFixed(2)\n        document.getElementById(\"demo05\").innerHTML = \"<b>F<\/b> = \"+ rez05 + \" \" + \"[N]\";\n      }\n\n      function Clear05() { lftClear(['txt05a', 'txt05b', 'txt05c'], 'demo05'); }\n    <\/script>\n    <button onclick=\"myFunction05()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear05\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear05()\">\n\t<br>\n     <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n\n\t<\/td>\n    <td>\n\t\t  <br><b>Premer D<\/b> [mm]=? <br><br>\n\n  Sila F [N]:<br>\n    <input type=\"text\" id=\"txt06a\" style=\"font-size: 12pt\" name=\"text06a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n<br>\n  Tlak p [bar]:<br>\n   <input type=\"text\" id=\"txt06b\" name=\"text06b\" style=\"font-size:12pt\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n<br>\n  Premer d [mm]:<br>\n    <input type=\"text\" id=\"txt06c\" style=\"font-size: 12pt\" name=\"text06c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n\n  <p id=\"demo06\"><\/p>\n        <script>\n      function myFunction06() {\n        var x06 = document.getElementById(\"txt06a\").value;\n        var y06 = document.getElementById(\"txt06b\").value;\n\t\tvar z06 = document.getElementById(\"txt06c\").value;\n\t\tvar rez06 = Math.sqrt(4\/Math.PI*(10*Number(x06)\/Number(y06)+Math.PI*Math.pow(Number(z06),2)\/4));\n\n        var rez06 = rez06.toFixed(2)\n        document.getElementById(\"demo06\").innerHTML = \"<b>D<\/b> = \"+ rez06 + \" \" + \"[mm]\";\n      }\n\n      function Clear06() { lftClear(['txt06a', 'txt06b', 'txt06c'], 'demo06'); }\n    <\/script>\n    <button onclick=\"myFunction06()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear06\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear06()\">\n\t<br>\n     <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n\n\t<\/td>\n\n\t<td>\n\t\t\t  <br><b>Premer d<\/b> [mm]=? <br><br>\n\n  Sila F [N]:<br>\n    <input type=\"text\" id=\"txt07a\" style=\"font-size: 12pt\" name=\"text07a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n<br>\n  Tlak p [bar]:<br>\n   <input type=\"text\" id=\"txt07b\" name=\"text07b\" style=\"font-size:12pt\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n<br>\n  Premer D [mm]:<br>\n    <input type=\"text\" id=\"txt07c\" style=\"font-size: 12pt\" name=\"text07c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">\n\n  <p id=\"demo07\"><\/p>\n        <script>\n      function myFunction07() {\n        var x07 = document.getElementById(\"txt07a\").value;\n        var y07 = document.getElementById(\"txt07b\").value;\n\t\tvar z07 = document.getElementById(\"txt07c\").value;\n\t\tvar rez07 = Math.sqrt(4\/Math.PI*(10*Number(x07)\/Number(y07)+Math.PI*Math.pow(Number(z07),2)\/4));\n\n\t\tvar rez07 = Math.sqrt(4\/Math.PI*(Math.PI*Math.pow(Number(z07),2)\/4-10*Number(x07)\/Number(y07)))\n\n        var rez07 = rez07.toFixed(2)\n        document.getElementById(\"demo07\").innerHTML = \"<b>d<\/b> = \"+ rez07 + \" \" + \"[mm]\";\n      }\n\n      function Clear07() { lftClear(['txt07a', 'txt07b', 'txt07c'], 'demo07'); }\n    <\/script>\n    <button onclick=\"myFunction07()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear07\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear07()\">\n\t<br>\n     <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n\n\t<\/td>\n\n  <\/tr>\n<\/tbody><\/table>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C1\">1. Tok kapljevine Q<sub>\u010c<\/sub>, ki ga \u010drpalka tla\u010di v tla\u010dni vod:<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba1.png\" alt=\"enacba1\" width=\"auto\" height=\"60\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s1.png\" alt=\"slika1\" width=\"auto\" height=\"60\">\n  <br>\n   <input type=\"text\" id=\"txt1a\" name=\"text1a\" style=\"font-size:12pt\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Iztisnina \u010drpalke q<sub>\u010c<\/sub> [cm<sup>3<\/sup>\/vrt]\n  <br>\n    <input type=\"text\" id=\"txt1b\" style=\"font-size: 12pt\" name=\"text1b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Vrtljaji \u010drpalke n<sub>\u010c<\/sub> [vrt\/min]\n  <br>\n    <input type=\"text\" id=\"txt1c\" style=\"font-size: 12pt\" name=\"text1c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Volumetri\u010dni izkoristek \u010drpalke <i>\u03b7<\/i><sub>v\u010c<\/sub> []\n    <p id=\"demo1\"><\/p>\n        <script>\n      function myFunction1() {\n        var x1 = document.getElementById(\"txt1a\").value;\n        var y1 = document.getElementById(\"txt1b\").value;\n        var z1 = document.getElementById(\"txt1c\").value;\n        var rez1 = (Number(x1)*Number(y1)*Number(z1))\/ 1000;\n        var rez1 = rez1.toFixed(2)\n        document.getElementById(\"demo1\").innerHTML = \"<b>Q<sub>\u010c<\/sub> <\/b> = \"+ rez1 + \" \" + \"[l\/min]\";\n      }\n\n      function Clear1() { lftClear(['txt1a', 'txt1b', 'txt1c'], 'demo1'); }\n    <\/script>\n    <button onclick=\"myFunction1()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear1\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear1()\">\n     <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C2\">2. Potrebna mo\u010d motorja P<sub>M<\/sub>, ki poganja \u010drpalko (\u010c) \u2013 (mo\u010d na pogonski gredi \u010drpalke):<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba2.png\" alt=\"enacba2\" width=\"auto\" height=\"60\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s2.png\" alt=\"slika2\" width=\"auto\" height=\"60\">\n  <br>\n    <input type=\"text\" id=\"txt2a\" style=\"font-size: 12pt\" name=\"text2a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Tlak nastavitve varnostnega ventila p<sub>VV<\/sub> [bar]\n  <br>\n    <input type=\"text\" id=\"txt2b\" style=\"font-size: 12pt\" name=\"text2b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Tok, ki ga \u010drpalka tla\u010di v tla\u010dni vod Q<sub>\u010c<\/sub> [l\/min]\n  <br>\n    <input type=\"text\" id=\"txt2c\" style=\"font-size: 12pt\" name=\"text2c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Skupni izkoristek \u010drpalke <i>\u03b7<\/i><sub>s\u010c<\/sub> [], ki lahko zavzame vrednost od 0 do 1\n    <p id=\"demo2\"><\/p>\n        <script>\n      function myFunction2() {\n        var x2 = document.getElementById(\"txt2a\").value;\n        var y2 = document.getElementById(\"txt2b\").value;\n        var z2 = document.getElementById(\"txt2c\").value;\n        var rez2 = (Number(x2)*Number(y2))\/ (600*Number(z2));\n        var rez2 = rez2.toFixed(2)\n        document.getElementById(\"demo2\").innerHTML = \"<b>P<sub>M<\/sub><\/b> = \"+ rez2 + \" \" + \"[kW]\";\n      }\n      function Clear2() { lftClear(['txt2a', 'txt2b', 'txt2c'], 'demo2'); }\n    <\/script>\n    <button onclick=\"myFunction2()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear2\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear2()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C3\">3. Potreben vrtilni navor motorja M<sub>M<\/sub>, ki poganja \u010drpalko:<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba3.png\" alt=\"enacba3\" width=\"auto\" height=\"60\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s3.png\" alt=\"slika3\" width=\"auto\" height=\"60\">\n  <br>\n    <input type=\"text\" id=\"txt3a\" style=\"font-size: 12pt\" name=\"text3a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Tlak na izstopu iz \u010drpalke p<sub>\u010c<\/sub> [bar]\n  <br>\n    <input type=\"text\" id=\"txt3b\" style=\"font-size: 12pt\" name=\"text3b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Iztisnina \u010drpalke q<sub>\u010c<\/sub> [cm<sup>3<\/sup>\/vrt]\n  <br>\n    <input type=\"text\" id=\"txt3c\" style=\"font-size: 12pt\" name=\"text3c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Mehansko-hidravli\u010dni izkoristek \u010drpalke <i>\u03b7<\/i><sub>mh\u010c<\/sub> [], ki lahko zavzame vrednost od 0 do 1\n    <p id=\"demo3\"><\/p>\n        <script>\n      function myFunction3() {\n        var x3 = document.getElementById(\"txt3a\").value;\n        var y3 = document.getElementById(\"txt3b\").value;\n        var z3 = document.getElementById(\"txt3c\").value;\n        var rez3 = (Number(x3)*Number(y3))\/ (2*Math.PI*10*Number(z3));\n        var rez3 = rez3.toFixed(2)\n        document.getElementById(\"demo3\").innerHTML = \"<b>M<sub>M<\/sub><\/b><\/b> = \"+ rez3 + \" \" + \"[Nm]\";\n      }\n      function Clear3() { lftClear(['txt3a', 'txt3b', 'txt3c'], 'demo3'); }\n    <\/script>\n    <button onclick=\"myFunction3()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear3\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear3()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C4\">4. Potrebna oziroma dopustna iztisnina \u010drpalke q<sub>\u010c<\/sub>:<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba4.png\" alt=\"enacba4\" width=\"auto\" height=\"60\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s4.png\" alt=\"slika4\" width=\"auto\" height=\"60\">\n  <br>\n    <input type=\"text\" id=\"txt4a\" style=\"font-size: 12pt\" name=\"text4a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Tok, ki ga \u010drpalka tla\u010di v tla\u010dni vod Q<sub>\u010c<\/sub> [l\/min]\n  <br>\n    <input type=\"text\" id=\"txt4b\" style=\"font-size: 12pt\" name=\"text4b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Vrtljaji \u010drpalke n<sub>\u010c<\/sub> [vrt\/min]\n  <br>\n    <input type=\"text\" id=\"txt4c\" style=\"font-size: 12pt\" name=\"text4c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Volumetri\u010dni izkoristek \u010drpalke <i>\u03b7<\/i><sub>v\u010c<\/sub> [], ki lahko zavzame vrednost od 0 do 1\n    <p id=\"demo4\"><\/p>\n        <script>\n      function myFunction4() {\n        var x4 = document.getElementById(\"txt4a\").value;\n        var y4 = document.getElementById(\"txt4b\").value;\n        var z4 = document.getElementById(\"txt4c\").value;\n        var rez4 = (Number(x4)*1000) \/ (Number(y4)*Number(z4));\n        var rez4 = rez4.toFixed(2)\n        document.getElementById(\"demo4\").innerHTML = \"<b>q<sub>\u010c<\/sub><\/b> = \"+ rez4 + \" \" + \"[cm<sup>3<\/sup>\/vrt]\";\n      }\n      function Clear4() { lftClear(['txt4a', 'txt4b', 'txt4c'], 'demo4'); }\n    <\/script>\n    <button onclick=\"myFunction4()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear4\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear4()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C5\">5. Izkoristek hidrostati\u010dne enote (HSE) \u2013 \u010drpalke (\u010c) oziroma hidravli\u010dnega motorja (HM):<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba5.png\" alt=\"enacba5\" width=\"auto\" height=\"60\">\n<br>\n <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C6\">6. Izra\u010dun toka kapljevine Q<sub>HM<\/sub> na vto\u010dni strani HM:<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba6.png\" alt=\"enacba6\" width=\"auto\" height=\"60\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s6.png\" alt=\"slika5\" width=\"auto\" height=\"60\">\n  <br>\n    <input type=\"text\" id=\"txt6a\" style=\"font-size: 12pt\" name=\"text6a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Iztisnina hidravli\u010dnega motorja q<sub>HM<\/sub> [cm<sup>3<\/sup>\/vrt]\n  <br>\n    <input type=\"text\" id=\"txt6b\" style=\"font-size: 12pt\" name=\"text6b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Vrtljaji hidravli\u010dnega motorja n<sub>HM<\/sub> [vrt\/min]\n  <br>\n    <input type=\"text\" id=\"txt6c\" style=\"font-size: 12pt\" name=\"text6c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Volumetri\u010dni izkoristek hidravli\u010dnega motorja <i>\u03b7<\/i><sub>vHM<\/sub> [], ki lahko zavzame vrednost od 0 do 1\n    <p id=\"demo6\"><\/p>\n        <script>\n      function myFunction6() {\n        var x6 = document.getElementById(\"txt6a\").value;\n        var y6 = document.getElementById(\"txt6b\").value;\n        var z6 = document.getElementById(\"txt6c\").value;\n        var rez6 = (Number(x6)*Number(y6)) \/ (1000*Number(z6));\n        var rez6 = rez6.toFixed(2)\n        document.getElementById(\"demo6\").innerHTML = \"<b>Q<sub>HM<\/sub> <\/b> = \"+ rez6 + \" \" + \"[l\/min]\";\n      }\n      function Clear6() { lftClear(['txt6a', 'txt6b', 'txt6c'], 'demo6'); }\n    <\/script>\n    <button onclick=\"myFunction6()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear6\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear6()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C7\">7. Izra\u010dun iztisnine q<sub>HM<\/sub>, \u010de poznamo zahtevane vrtljaje HM (n<sub>HM<\/sub>) in razpolo\u017eljiv Q<sub>HM<\/sub> (= Q<sub>HM vtok<\/sub>):<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba7.png\" alt=\"enacba7\" width=\"auto\" height=\"60\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s7.png\" alt=\"slika7\" width=\"auto\" height=\"60\">\n  <br>\n    <input type=\"text\" id=\"txt7a\" style=\"font-size: 12pt\" name=\"text7a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Tok, ki vstopa v hidravli\u010dni motor Q<sub>HM<\/sub> [l\/min]\n  <br>\n    <input type=\"text\" id=\"txt7b\" style=\"font-size: 12pt\" name=\"text7b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Volumetri\u010dni izkoristek hidravli\u010dnega motorja <i>\u03b7<\/i><sub>vHM<\/sub> [], ki lahko zavzame vrednost od 0 do 1\n  <br>\n    <input type=\"text\" id=\"txt7c\" style=\"font-size: 12pt\" name=\"text7c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Vrtljaji hidravli\u010dnega motorja n<sub>HM<\/sub> [vrt\/min]\n    <p id=\"demo7\"><\/p>\n        <script>\n      function myFunction7() {\n        var x7 = document.getElementById(\"txt7a\").value;\n        var y7 = document.getElementById(\"txt7b\").value;\n        var z7 = document.getElementById(\"txt7c\").value;\n        var rez7 = (Number(x7)*1000*Number(y7)) \/ Number(z7);\n        var rez7 = rez7.toFixed(2)\n        document.getElementById(\"demo7\").innerHTML = \"<b>q<sub>HM<\/sub><\/b> = \"+ rez7 + \" \" + \"[cm<sup>3<\/sup>\/vrt]\";\n      }\n      function Clear7() { lftClear(['txt7a', 'txt7b', 'txt7c'], 'demo7'); }\n    <\/script>\n    <button onclick=\"myFunction7()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear7\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear7()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C8\">8. Vrtilni navor M<sub>HM<\/sub>, ki ga daje HM na izstopni gredi (ob konstantnem \u0161tevilu vrtljajev: n<sub>HM<\/sub> =\nkonst., torej: a [m\/s<sup>2<\/sup>] = 0):<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba8.png\" alt=\"enacba8\" width=\"auto\" height=\"60\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s8.png\" alt=\"slika8\" width=\"auto\" height=\"60\">\n  <br>\n    <input type=\"text\" id=\"txt8a\" style=\"font-size: 12pt\" name=\"text8a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Razlika tlakov med vto\u010dno in izto\u010dno odprtino HM \u0394p<sub>HM<\/sub> [bar]\n  <br>\n    <input type=\"text\" id=\"txt8b\" style=\"font-size: 12pt\" name=\"text8b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Iztisnina hidravli\u010dnega motorja q<sub>HM<\/sub> [cm<sup>3<\/sup>\/vrt]\n  <br>\n    <input type=\"text\" id=\"txt8c\" style=\"font-size: 12pt\" name=\"text8c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Mehanski izkoristek hidravli\u010dnega motorja <i>\u03b7<\/i><sub>mhHM<\/sub> [], ki lahko zavzame vrednost od 0 do 1\n    <p id=\"demo8\"><\/p>\n        <script>\n      function myFunction8() {\n        var x8 = document.getElementById(\"txt8a\").value;\n        var y8 = document.getElementById(\"txt8b\").value;\n        var z8 = document.getElementById(\"txt8c\").value;\n        var rez8 = (Number(x8)*Number(y8)*Number(z8))\/ (2*Math.PI*10);\n        var rez8 = rez8.toFixed(2)\n        document.getElementById(\"demo8\").innerHTML = \"<b>M<sub>HM<\/sub><\/b><\/b> = \"+ rez8 + \" \" + \"[Nm]\";\n      }\n      function Clear8() { lftClear(['txt8a', 'txt8b', 'txt8c'], 'demo8'); }\n    <\/script>\n    <button onclick=\"myFunction8()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear8\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear8()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C9\">9. Izra\u010dun vrtljajev n<sub>HM<\/sub>, \u010de poznamo tok Q<sub>HM<\/sub> in iztisnino q<sub>HM<\/sub>:<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba9.png\" alt=\"enacba9\" width=\"auto\" height=\"60\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s9.png\" alt=\"slika9\" width=\"auto\" height=\"60\">\n  <br>\n    <input type=\"text\" id=\"txt9a\" style=\"font-size: 12pt\" name=\"text9a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Tok kapljevine na vto\u010dni strani hidravli\u010dnega motorja Q<sub>HM<\/sub> [l\/min]\n  <br>\n    <input type=\"text\" id=\"txt9b\" style=\"font-size: 12pt\" name=\"text9b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Volumetri\u010dni izkoristek hidravli\u010dnega motorja <i>\u03b7<\/i><sub>vHM<\/sub> [], ki lahko zavzame vrednost od 0 do 1\n  <br>\n    <input type=\"text\" id=\"txt9c\" style=\"font-size: 12pt\" name=\"text9c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Iztisnina hidravli\u010dnega motorja q<sub>HM<\/sub> [cm<sup>3<\/sup>\/vrt]\n    <p id=\"demo9\"><\/p>\n        <script>\n      function myFunction9() {\n        var x9 = document.getElementById(\"txt9a\").value;\n        var y9 = document.getElementById(\"txt9b\").value;\n        var z9 = document.getElementById(\"txt9c\").value;\n        var rez9 = (Number(x9)*1000*Number(y9)) \/ Number(z9);\n        var rez9 = rez9.toFixed(2)\n        document.getElementById(\"demo9\").innerHTML = \"<b>n<sub>HM<\/sub> <\/b> = \"+ rez9 + \" \" + \"[vrt\/min]\";\n      }\n      function Clear9() { lftClear(['txt9a', 'txt9b', 'txt9c'], 'demo9'); }\n    <\/script>\n    <button onclick=\"myFunction9()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear9\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear9()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C10\">10. Izstopna mo\u010d P<sub>iHM<\/sub> (na izstopni gredi) HM:<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba10.png\" alt=\"enacba10\" width=\"auto\" height=\"60\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s10.png\" alt=\"slika10\" width=\"auto\" height=\"60\">\n  <br>\n    <input type=\"text\" id=\"txt10a\" style=\"font-size: 12pt\" name=\"text10a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Razlika tlakov med vto\u010dno in izto\u010dno odprtino HM \u0394p<sub>HM<\/sub> [bar]\n  <br>\n    <input type=\"text\" id=\"txt10b\" style=\"font-size: 12pt\" name=\"text10b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Tok kapljevine na vto\u010dni strani hidravli\u010dnega motorja Q<sub>HM<\/sub> [l\/min]\n  <br>\n    <input type=\"text\" id=\"txt10c\" style=\"font-size: 12pt\" name=\"text10c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Skupni izkoristek hidravli\u010dnega motorja <i>\u03b7<\/i><sub>sHM<\/sub> []\n    <p id=\"demo10\"><\/p>\n        <script>\n      function myFunction10() {\n        var x10 = document.getElementById(\"txt10a\").value;\n        var y10 = document.getElementById(\"txt10b\").value;\n        var z10 = document.getElementById(\"txt10c\").value;\n        var rez10 = (Number(x10)*Number(y10)*Number(z10))\/ (600);\n        var rez10 = rez10.toFixed(2)\n        document.getElementById(\"demo10\").innerHTML = \"<b>P<sub>iHM<\/sub><\/b> = \"+ rez10 + \" \" + \"[kW]\";\n      }\n      function Clear10() { lftClear(['txt10a', 'txt10b', 'txt10c'], 'demo10'); }\n    <\/script>\n    <button onclick=\"myFunction10()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear10\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear10()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C11\">11. Izra\u010dun notranjega premera cevnega voda d<sub>n<\/sub><br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba11.png\" alt=\"enacba11\" width=\"auto\" height=\"60\">\n  <br>\n    <input type=\"text\" id=\"txt11a\" style=\"font-size: 12pt\" name=\"text11a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Pretok skozi cev Q [l\/min]\n  <br>\n    <input type=\"text\" id=\"txt11b\" style=\"font-size: 12pt\" name=\"text11b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Hitrost pretakanja fluida po cevi v [m\/s]\n    <p id=\"demo11\"><\/p>\n        <script>\n      function myFunction11() {\n        var x11 = document.getElementById(\"txt11a\").value;\n        var y11 = document.getElementById(\"txt11b\").value;\n        var rez11 = Math.sqrt((400*Number(x11))\/(6*Math.PI*Number(y11)));\n        var rez11 = rez11.toFixed(2)\n        document.getElementById(\"demo11\").innerHTML = \"<b>d<sub>n<\/sub><\/b> = \"+ rez11 + \" \" + \"[mm]\";\n      }\n      function Clear11() { lftClear(['txt11a', 'txt11b'], 'demo11'); }\n    <\/script>\n    <button onclick=\"myFunction11()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear11\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear11()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C12\">12. Izra\u010dun linijskih izgub po ceveh<br><br><\/span>\n<span style=\"font-size:1.10em; font-weight:bold\">a) Izguba tlaka zaradi odpora pri toku kapljevine (Doreyjeva ena\u010dba)<br><br><\/span>\n\t\t<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba12a.png\" alt=\"enacba12a\" width=\"auto\" height=\"60\">\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12aa\" style=\"font-size: 12pt\" name=\"text12aa\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Koeficient linijskih izgub \u03be []\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12ab\" style=\"font-size: 12pt\" name=\"text12ab\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Gostota hidravli\u010dne kapljevine \u03c1 [kg\/m<sup>3<\/sup>]\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12ac\" style=\"font-size: 12pt\" name=\"text12ac\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Hitrost pretakanja hidravli\u010dne kapljevine skozi cev v [m\/s]\n\t\t\t<p id=\"demo12a\"><\/p>\n\t\t\t\t<script>\n\t\t\t  function myFunction12a() {\n\t\t\t\tvar x12aa = document.getElementById(\"txt12aa\").value;\n\t\t\t\tvar y12ab = document.getElementById(\"txt12ab\").value;\n\t\t\t\tvar z12ac = document.getElementById(\"txt12ac\").value;\n\t\t\t\tvar rez12a = Number(x12aa)*Number(y12ab)*Math.pow(Number(z12ac),2)\/2\/100000;\n\t\t\t\tvar rez12a = rez12a.toFixed(5)\n\t\t\t\tdocument.getElementById(\"demo12a\").innerHTML = \"<b>&#916p<\/b> = \"+ rez12a + \" \" + \"[bar]\";\n\t\t\t  }\n\t\t\t  function Clear12a() { lftClear(['txt12aa', 'txt12ab', 'txt12ac'], 'demo12a'); }\n\t\t\t<\/script>\n\t\t\t<button onclick=\"myFunction12a()\">Izra\u010dunaj<\/button>\n\t\t\t<input id=\"btnClear12a\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear12a()\">\n\t\t <br>\n\t\t <br>\n\n<span style=\"font-size:1.10em; font-weight:bold\">b) Koeficient linijskih izgub <i><b>\u03be<\/b><\/i> za ravne cevi s kro\u017enim prerezom<br><br><\/span>\n\t\t<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba12b.png\" alt=\"enacba12b\" width=\"auto\" height=\"60\">\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12ba\" style=\"font-size: 12pt\" name=\"text12ba\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Koeficient trenja \u03bb []\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12bb\" style=\"font-size: 12pt\" name=\"text12bb\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Dol\u017eina cevi l [m]\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12bc\" style=\"font-size: 12pt\" name=\"text12bc\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Notranji premer cevi d [m]\n\t\t\t<p id=\"demo12b\"><\/p>\n\t\t\t\t<script>\n\t\t\t  function myFunction12b() {\n\t\t\t\tvar x12ba = document.getElementById(\"txt12ba\").value;\n\t\t\t\tvar y12bb = document.getElementById(\"txt12bb\").value;\n\t\t\t\tvar z12bc = document.getElementById(\"txt12bc\").value;\n\t\t\t\tvar rez12b = Number(x12ba)*Number(y12bb)\/Number(z12bc);\n\t\t\t\tvar rez12b = rez12b.toFixed(2)\n\t\t\t\tdocument.getElementById(\"demo12b\").innerHTML = \"<i><b>&#958<\/b><\/i> = \"+ rez12b + \" \" + \"\";\n\t\t\t  }\n\t\t\t  function Clear12b() { lftClear(['txt12ba', 'txt12bb', 'txt12bc'], 'demo12b'); }\n\t\t\t<\/script>\n\t\t\t<button onclick=\"myFunction12b()\">Izra\u010dunaj<\/button>\n\t\t\t<input id=\"btnClear12b\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear12b()\">\n\t\t <br>\n\t\t <br>\n\n <span style=\"font-size:1.10em; font-weight:bold\">c) Izra\u010dun Reynoldsovega \u0161tevila<br><br><\/span>\n\t\t<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba12c.png\" alt=\"enacba12c\" width=\"auto\" height=\"60\">\n\t\t<img decoding=\"async\" src=\"\/lft\/img\/calc\/s12cc.png\" alt=\"slika12cc\" width=\"auto\" height=\"60\">\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12ca\" style=\"font-size: 12pt\" name=\"text12ca\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Hitrost pretakanja hidravli\u010dne kapljevine skozi cev v [m\/s]\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12cb\" style=\"font-size: 12pt\" name=\"text12cb\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Notranji premer cevi d [m]\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12cc\" style=\"font-size: 12pt\" name=\"text12cc\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Kinemati\u010dna viskoznost <i>\u03bd<\/i> [m<sup>2<\/sup>\/s]\n\t\t\t<p id=\"demo12c\"><\/p>\n\t\t\t\t<script>\n\t\t\t  function myFunction12c() {\n\t\t\t\tvar x12ca = document.getElementById(\"txt12ca\").value;\n\t\t\t\tvar y12cb = document.getElementById(\"txt12cb\").value;\n\t\t\t\tvar z12cc = document.getElementById(\"txt12cc\").value;\n\t\t\t\tvar rez12c = Number(x12ca)*Number(y12cb)\/Number(z12cc);\n\t\t\t\tvar rez12c = rez12c.toFixed(2)\n\t\t\t\tdocument.getElementById(\"demo12c\").innerHTML = \"Re = \"+ rez12c + \" \" + \"\";\n\t\t\t  }\n\t\t\t  function Clear12c() { lftClear(['txt12ca', 'txt12cb', 'txt12cc'], 'demo12c'); }\n\t\t\t<\/script>\n\t\t\t<button onclick=\"myFunction12c()\">Izra\u010dunaj<\/button>\n\t\t\t<input id=\"btnClear12c\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear12c()\">\n\t\t\t<a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<span style=\"font-size:1.10em; font-weight:bold\">d) Koeficient trenja \u03bb v laminarnem podro\u010dju (Re&lt;2320)<br><br><\/span>\n\t\t<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba12d.png\" alt=\"enacba12d\" width=\"auto\" height=\"60\">\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12da\" style=\"font-size: 12pt\" name=\"text12da\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Faktor oblike cevi \u03c6, \u03c6=1 za okrogle cevi []\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12db\" style=\"font-size: 12pt\" name=\"text12db\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Reynoldsovo \u0161tevilo Re []\n\t\t\t<p id=\"demo12d\"><\/p>\n\t\t\t\t<script>\n\t\t\t  function myFunction12d() {\n\t\t\t\tvar x12da = document.getElementById(\"txt12da\").value;\n\t\t\t\tvar y12db = document.getElementById(\"txt12db\").value;\n\t\t\t\tvar rez12d = Number(x12da)*64\/Number(y12db);\n\t\t\t\tvar rez12d = rez12d.toFixed(4)\n\t\t\t\tdocument.getElementById(\"demo12d\").innerHTML = \"&#955 = \"+ rez12d + \" \" + \"\";\n\t\t\t  }\n\t\t\t  function Clear12d() { lftClear(['txt12da', 'txt12db'], 'demo12d'); }\n\t\t\t<\/script>\n\t\t\t<button onclick=\"myFunction12d()\">Izra\u010dunaj<\/button>\n\t\t\t<input id=\"btnClear12d\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear12d()\">\n\t\t\t<a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<span style=\"font-size:1.10em; font-weight:bold\">e) Koeficient trenja \u03bb v turbolentnem podro\u010dju (2320&lt;Re) za hidravli\u010dno gladke cevi<br><br><\/span>\n\t\t<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba12e.png\" alt=\"enacba12e\" width=\"auto\" height=\"60\">\n\t\t  <br>\n\t\t\t<input type=\"text\" id=\"txt12ea\" style=\"font-size: 12pt\" name=\"text12ea\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Reynoldsovo \u0161tevilo Re []\n\t\t\t<p id=\"demo12e\"><\/p>\n\t\t\t\t<script>\n\t\t\t  function myFunction12e() {\n\t\t\t\tvar x12ea = document.getElementById(\"txt12ea\").value;\n\t\t\t\tvar rez12e = 0.31\/(Math.pow((Math.log10((0.143*Number(x12ea)))),2));\n\t\t\t\tvar rez12e = rez12e.toFixed(4)\n\t\t\t\tdocument.getElementById(\"demo12e\").innerHTML = \"&#955 = \"+ rez12e + \" \" + \"\";\n\t\t\t  }\n\t\t\t  function Clear12e() { lftClear(['txt12ea'], 'demo12e'); }\n\t\t\t<\/script>\n\t\t\t<button onclick=\"myFunction12e()\">Izra\u010dunaj<\/button>\n\t\t\t<input id=\"btnClear12e\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear12e()\">\n\t\t\t<a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C13\">13. Izra\u010dun notranjega pu\u0161\u010danja v hidrostati\u010dni re\u017ei (cilindri\u010dni bat v cilindri\u010dni izvrtini)<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba13.png\" alt=\"enacba13\" width=\"auto\" height=\"60\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s13.png\" alt=\"slika13\" width=\"auto\" height=\"60\">\n  <br>\n  <input type=\"text\" id=\"txt13a\" style=\"font-size: 12pt\" name=\"text13a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-\u0160tevilo iztekajo\u010dih prerezov n<sub>\u0161t,izt<\/sub> []<br>\n  <input type=\"text\" id=\"txt13b\" style=\"font-size: 12pt\" name=\"text13b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Tla\u010dna razlika v re\u017ei \u0394p [bar]<br>\n  <input type=\"text\" id=\"txt13c\" style=\"font-size: 12pt\" name=\"text13c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Srednji premer v re\u017ei D<sub>sr<\/sub> (pri centri\u010dno postavljenem batu) [mm]<br>\n  <input type=\"text\" id=\"txt13d\" style=\"font-size: 12pt\" name=\"text13d\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Povpre\u010dna vi\u0161ina re\u017ee s [mm]<br>\n  <input type=\"text\" id=\"txt13e\" style=\"font-size: 12pt\" name=\"text13e\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Gostota hidravli\u010dne kapljevine \u03c1 [kg\/m<sup>3<\/sup>]<br>\n  <input type=\"text\" id=\"txt13f\" style=\"font-size: 12pt\" name=\"text13f\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Kinemati\u010dna viskoznost <i>\u03bd<\/i> [mm<sup>2<\/sup>\/s]<br>\n  <input type=\"text\" id=\"txt13g\" style=\"font-size: 12pt\" name=\"text13g\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Dol\u017eina prekritja L (bat\/ohi\u0161je) [mm]<br>\n  <input type=\"text\" id=\"txt13h\" style=\"font-size: 12pt\" name=\"text13h\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Faktor centri\u010dnosti\/eksentri\u010dnosti krmilnega bata v izvrtini []: f<sub>c,eksc<\/sub>=1 (centriran bat), f<sub>c,eksc<\/sub>=2.5 (bat v skrajni legi)<br>\n\n    <p id=\"demo13\"><\/p>\n        <script>\n      function myFunction13() {\n        var x13a = document.getElementById(\"txt13a\").value;\n\t\tvar x13b = document.getElementById(\"txt13b\").value;\n\t\tvar x13c = document.getElementById(\"txt13c\").value;\n\t\tvar x13d = document.getElementById(\"txt13d\").value;\n\t\tvar x13e = document.getElementById(\"txt13e\").value;\n\t\tvar x13f = document.getElementById(\"txt13f\").value;\n\t\tvar x13g = document.getElementById(\"txt13g\").value;\n\t\tvar x13h = document.getElementById(\"txt13h\").value;\n        var rez13 = Number(x13a)*(Math.PI*Number(x13b*100000)*Number(x13c\/1000)*Math.pow(Number(x13d\/1000),3)\/(12*Number(x13e)*Number(x13f\/1000000)*Number(x13g\/1000))*Number(x13h));\n        var rez13 = rez13.toFixed(10)\n\t\tvar rez13b = Number(x13a)*(Math.PI*Number(x13b*100000)*Number(x13c\/1000)*Math.pow(Number(x13d\/1000),3)\/(12*Number(x13e)*Number(x13f\/1000000)*Number(x13g\/1000))*Number(x13h))*1000*60;\n        var rez13b = rez13b.toFixed(5)\n        document.getElementById(\"demo13\").innerHTML = \"<b><i>Q<sub>L<\/sub><\/i><sub>max<\/sub><\/b> = \"+ rez13 + \" \" + \"[m<sup>3<\/sup>\/s] = \"+ rez13b + \" \" + \"[l\/min]\";\n\n      }\n      function Clear13() { lftClear(['txt13a', 'txt13b', 'txt13c', 'txt13d', 'txt13e', 'txt13f', 'txt13g', 'txt13h'], 'demo13'); }\n    <\/script>\n    <button onclick=\"myFunction13()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear13\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear13()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C14\">14. Izra\u010dun volumna hidravli\u010dnega akumulatorja (HA)<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba14.png\" alt=\"enacba14\" width=\"auto\" height=\"120\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s14.png\" alt=\"slika14\" width=\"auto\" height=\"120\">\n  <br>\n  <input type=\"text\" id=\"txt14a\" style=\"font-size: 12pt\" name=\"text14a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Najve\u010dji primanjkljaj hidravli\u010dne kapljevine v sistemu \u0394V<sub>1a<\/sub> [L]<br>\n  <input type=\"text\" id=\"txt14b\" style=\"font-size: 12pt\" name=\"text14b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Najvi\u0161ji mo\u017eni delovni tlak p<sub>MAX<\/sub> (izklop \u010drpalke) [bar]<br>\n  <input type=\"text\" id=\"txt14c\" style=\"font-size: 12pt\" name=\"text14c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Najvi\u0161ji mo\u017eni ra\u010dunski delovni tlak p<sub>ZG<\/sub> (vklop \u010drpalke) [bar]<br>\n  <input type=\"text\" id=\"txt14d\" style=\"font-size: 12pt\" name=\"text14d\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Eksponent ekspanzije plina n<sub>e1<\/sub> (n<sub>e1<\/sub>=1-1.4)<br>\n  <input type=\"text\" id=\"txt14e\" style=\"font-size: 12pt\" name=\"text14e\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Tlak predpolnitve plina p<sub>0<\/sub> [bar]<br>\n  <input type=\"text\" id=\"txt14f\" style=\"font-size: 12pt\" name=\"text14f\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Eksponent kompresije plina n<sub>k<\/sub> (n<sub>k<\/sub>=1-1.4)<br>\n  <input type=\"text\" id=\"txt14g\" style=\"font-size: 12pt\" name=\"text14g\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Najni\u017eji delovni tlak p<sub>SP<\/sub> [bar]<br>\n  <input type=\"text\" id=\"txt14h\" style=\"font-size: 12pt\" name=\"text14h\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Eksponent ekspanzije plina n<sub>e2<\/sub> (n<sub>e2<\/sub>=1-1.4)<br>\n\n    <p id=\"demo14\"><\/p>\n        <script>\n      function myFunction14() {\n        var x14a = document.getElementById(\"txt14a\").value;\n\t\tvar x14b = document.getElementById(\"txt14b\").value;\n\t\tvar x14c = document.getElementById(\"txt14c\").value;\n\t\tvar x14d = document.getElementById(\"txt14d\").value;\n\t\tvar x14e = document.getElementById(\"txt14e\").value;\n\t\tvar x14f = document.getElementById(\"txt14f\").value;\n\t\tvar x14g = document.getElementById(\"txt14g\").value;\n\t\tvar x14h = document.getElementById(\"txt14h\").value;\n        var rez14 =Number(x14a)\/ (Math.pow(Number(x14b)\/Number(x14c),1\/Number(x14d))*(Math.pow(Number(x14e)\/Number(x14b),1\/Number(x14f)))*(Math.pow(Number(x14c)\/Number(x14g),1\/Number(x14h))-1));\n\t\tvar rez14 = rez14.toFixed(2)\n        document.getElementById(\"demo14\").innerHTML = \"<b>V<sub>0<\/sub><\/b> = \"+ rez14 + \" \" + \"[L]\";\n      }\n      function Clear14() { lftClear(['txt14a', 'txt14b', 'txt14c', 'txt14d', 'txt14e', 'txt14f', 'txt14g', 'txt14h'], 'demo14'); }\n    <\/script>\n    <button onclick=\"myFunction14()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear14\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear14()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C15\">15. Hertzov tlak: kroglica-kroglica<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s15a.png\" alt=\"slika15\" width=\"auto\" height=\"120\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba15.png\" alt=\"enacba15\" width=\"auto\" height=\"60\">\n  <br>\n\n<table style=\"width:100%\">\n  <tbody><tr>\n    <td>\n\t<br>\n\t<b>Izra\u010dun pritisne sile F=?<\/b><br>\n\t <input type=\"text\" id=\"txt15a\" style=\"font-size: 12pt\" name=\"text15a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>1<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt15b\" style=\"font-size: 12pt\" name=\"text15b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>2<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt15c\" style=\"font-size: 12pt\" name=\"text15c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>1<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt15d\" style=\"font-size: 12pt\" name=\"text15d\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>2<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt15e\" style=\"font-size: 12pt\" name=\"text15e\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>1<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt15f\" style=\"font-size: 12pt\" name=\"text15f\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>2<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt15g\" style=\"font-size: 12pt\" name=\"text15g\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Najve\u010dji Hertzov tlak p<sub>0<\/sub> [MPa]<br>\n\n    <p id=\"demo15\"><\/p>\n        <script>\n      function myFunction15() {\n        var x15a = document.getElementById(\"txt15a\").value;\n\t\tvar x15b = document.getElementById(\"txt15b\").value;\n\t\tvar x15c = document.getElementById(\"txt15c\").value;\n\t\tvar x15d = document.getElementById(\"txt15d\").value;\n\t\tvar x15e = document.getElementById(\"txt15e\").value;\n\t\tvar x15f = document.getElementById(\"txt15f\").value;\n\t\tvar x15g = document.getElementById(\"txt15g\").value;\n\t\tvar Rzv = Math.pow((1\/Number(x15a)+1\/Number(x15b)),-1);\n\t\tvar Ezv = Math.pow((1-Math.pow(Number(x15e),2))\/Number(x15c)+(1-Math.pow(Number(x15f),2))\/Number(x15d),-1);\n        var rez15 = Math.pow(Number(x15g),3)*Math.pow(Math.PI,3)*Math.pow(Number(Rzv),2)\/(6*Math.pow(Number(Ezv),2));\n\n\t\tvar Rzv = Rzv.toFixed(2)\n\t\tvar Ezv = Ezv.toFixed(2)\n\t\tvar rez15 = rez15.toFixed(2)\n        document.getElementById(\"demo15\").innerHTML = \"<b>Ekvivalentni Polmer R*<\/b> = \"+ Rzv + \" \" + \"[mm] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ Ezv + \" \" + \"[MPa] <br\/> <b>Pritisna sila F<\/b> = \"+ rez15 + \" \" + \"[N]\";\n      }\n      function Clear15() { lftClear(['txt15a', 'txt15b', 'txt15c', 'txt15d', 'txt15e', 'txt15f', 'txt15g'], 'demo15'); }\n    <\/script>\n\n\t    <button onclick=\"myFunction15()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear15\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear15()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n\n\t<\/td>\n    <td>\n\n\t<br>\n\n\t<b>Izra\u010dun najve\u010djega Hertzovega tlaka p<sub>0<\/sub>=?<\/b><br>\n\t <input type=\"text\" id=\"txt17a\" style=\"font-size: 12pt\" name=\"text17a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>1<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt17b\" style=\"font-size: 12pt\" name=\"text17b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>2<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt17c\" style=\"font-size: 12pt\" name=\"text17c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>1<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt17d\" style=\"font-size: 12pt\" name=\"text17d\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>2<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt17e\" style=\"font-size: 12pt\" name=\"text17e\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>1<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt17f\" style=\"font-size: 12pt\" name=\"text17f\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>2<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt17g\" style=\"font-size: 12pt\" name=\"text17g\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Pritisna sila F [N]<br>\n\n    <p id=\"demo17\"><\/p>\n        <script>\n      function myFunction17() {\n        var x17a = document.getElementById(\"txt17a\").value;\n\t\tvar x17b = document.getElementById(\"txt17b\").value;\n\t\tvar x17c = document.getElementById(\"txt17c\").value;\n\t\tvar x17d = document.getElementById(\"txt17d\").value;\n\t\tvar x17e = document.getElementById(\"txt17e\").value;\n\t\tvar x17f = document.getElementById(\"txt17f\").value;\n\t\tvar x17g = document.getElementById(\"txt17g\").value;\n\t\tvar Rzv = Math.pow((1\/Number(x17a)+1\/Number(x17b)),-1);\n\t\tvar Ezv = Math.pow((1-Math.pow(Number(x17e),2))\/Number(x17c)+(1-Math.pow(Number(x17f),2))\/Number(x17d),-1);\n\t\tvar a = Math.pow((3*Number(x17g)*Number(Rzv)\/(4*Number(Ezv))),1\/3)\n        var rez17 = 3*Number(x17g)\/(2*Math.PI*Math.pow(Number(a),2))\n\n\t\tvar Rzv = Rzv.toFixed(2)\n\t\tvar Ezv = Ezv.toFixed(2)\n\t\tvar rez17 = rez17.toFixed(2)\n        document.getElementById(\"demo17\").innerHTML = \"<b>Ekvivalentni Polmer R*<\/b> = \"+ Rzv + \" \" + \"[mm] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ Ezv + \" \" + \"[MPa] <br\/> <b>Najve\u010dji Hertzov tlak p<sub>0<\/sub> <\/b> = \"+ rez17 + \" \" + \"[MPa]\";\n      }\n      function Clear17() { lftClear(['txt17a', 'txt17b', 'txt17c', 'txt17d', 'txt17e', 'txt17f', 'txt17g'], 'demo17'); }\n    <\/script>\n\t<button onclick=\"myFunction17()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear17\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear17()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n\n\t<\/td>\n  <\/tr>\n\t\t <\/tbody><\/table>\n\n<br>\nRe\u0161itve lahko preverite na spletnih straneh\n<a href=\"http:\/\/tribology-abc.com\/sub10.htm\" target=\"_blank\">Tribology-abc<\/a> in\n<a href=\"https:\/\/www.mesys.ch\/?page_id=54\" target=\"_blank\">Mesys.<\/a><br><br>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C16\">16. Hertzov tlak: kroglica-ravnina<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s16.png\" alt=\"slika16\" width=\"auto\" height=\"80\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba15.png\" alt=\"enacba16\" width=\"auto\" height=\"60\">\n<table style=\"width:100%\">\n\t<tbody><tr>\n\t\t<td>\n  <br>\n  \t<b>Izra\u010dun pritisne sile F=?<\/b><br>\n  <input type=\"text\" id=\"txt16a\" style=\"font-size: 12pt\" name=\"text16a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>1<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt16c\" style=\"font-size: 12pt\" name=\"text16c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>1<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt16d\" style=\"font-size: 12pt\" name=\"text16d\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>2<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt16e\" style=\"font-size: 12pt\" name=\"text16e\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>1<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt16f\" style=\"font-size: 12pt\" name=\"text16f\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>2<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt16g\" style=\"font-size: 12pt\" name=\"text16g\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Najve\u010dji Hertzov tlak p<sub>0<\/sub> [MPa]<br>\n\n    <p id=\"demo16\"><\/p>\n        <script>\n      function myFunction16() {\n        var x16a = document.getElementById(\"txt16a\").value;\n\t\tvar x16c = document.getElementById(\"txt16c\").value;\n\t\tvar x16d = document.getElementById(\"txt16d\").value;\n\t\tvar x16e = document.getElementById(\"txt16e\").value;\n\t\tvar x16f = document.getElementById(\"txt16f\").value;\n\t\tvar x16g = document.getElementById(\"txt16g\").value;\n\t\tvar Rzv = Math.pow((1\/Number(x16a)),-1);\n\t\tvar Ezv = Math.pow((1-Math.pow(Number(x16e),2))\/Number(x16c)+(1-Math.pow(Number(x16f),2))\/Number(x16d),-1);\n        var rez16 = Math.pow(Number(x16g),3)*Math.pow(Math.PI,3)*Math.pow(Number(Rzv),2)\/(6*Math.pow(Number(Ezv),2));\n\n\t\tvar Rzv = Rzv.toFixed(2)\n\t\tvar Ezv = Ezv.toFixed(2)\n\t\tvar rez16 = rez16.toFixed(2)\n        document.getElementById(\"demo16\").innerHTML = \"<b>Ekvivalentni Polmer R*<\/b> = \"+ Rzv + \" \" + \"[mm] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ Ezv + \" \" + \"[MPa] <br\/> <b>Pritisna sila F<\/b> = \"+ rez16 + \" \" + \"[N]\";\n      }\n      function Clear16() { lftClear(['txt16a', 'txt16c', 'txt16d', 'txt16e', 'txt16f', 'txt16g'], 'demo16'); }\n    <\/script>\n    <button onclick=\"myFunction16()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear16\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear16()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n\t\t <\/td>\n<td>\n<b>Izra\u010dun najve\u010djega Hertzovega tlaka p<sub>0<\/sub>=?<\/b><br>\n\t <input type=\"text\" id=\"txt18a\" style=\"font-size: 12pt\" name=\"text18a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>1<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt18c\" style=\"font-size: 12pt\" name=\"text18c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>1<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt18d\" style=\"font-size: 12pt\" name=\"text18d\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>2<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt18e\" style=\"font-size: 12pt\" name=\"text18e\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>1<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt18f\" style=\"font-size: 12pt\" name=\"text18f\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>2<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt18g\" style=\"font-size: 12pt\" name=\"text18g\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Pritisna sila F [N]<br>\n\n    <p id=\"demo18\"><\/p>\n        <script>\n      function myFunction18() {\n        var x18a = document.getElementById(\"txt18a\").value;\n\t\tvar x18c = document.getElementById(\"txt18c\").value;\n\t\tvar x18d = document.getElementById(\"txt18d\").value;\n\t\tvar x18e = document.getElementById(\"txt18e\").value;\n\t\tvar x18f = document.getElementById(\"txt18f\").value;\n\t\tvar x18g = document.getElementById(\"txt18g\").value;\n\t\tvar Rzv = Math.pow((1\/Number(x18a)),-1);\n\t\tvar Ezv = Math.pow((1-Math.pow(Number(x18e),2))\/Number(x18c)+(1-Math.pow(Number(x18f),2))\/Number(x18d),-1);\n\t\tvar a = Math.pow((3*Number(x18g)*Number(Rzv)\/(4*Number(Ezv))),1\/3);\n        var rez18 = 3*Number(x18g)\/(2*Math.PI*Math.pow(Number(a),2));\n\n\t\tvar Rzv = Rzv.toFixed(2)\n\t\tvar Ezv = Ezv.toFixed(2)\n\t\tvar rez18 = rez18.toFixed(2)\n        document.getElementById(\"demo18\").innerHTML = \"<b>Ekvivalentni Polmer R*<\/b> = \"+ Rzv + \" \" + \"[mm] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ Ezv + \" \" + \"[MPa] <br\/> <b>Najve\u010dji Hertzov tlak p<sub>0<\/sub> <\/b> = \"+ rez18 + \" \" + \"[MPa]\";\n      }\n      function Clear18() { lftClear(['txt18a', 'txt18c', 'txt18d', 'txt18e', 'txt18f', 'txt18g'], 'demo18'); }\n    <\/script>\n\t<button onclick=\"myFunction18()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear18\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear18()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<\/td>\n  <\/tr>\n\t\t <\/tbody><\/table>\n\n<br>\nRe\u0161itve lahko preverite na spletnih straneh\n<a href=\"http:\/\/tribology-abc.com\/sub10.htm\" target=\"_blank\">Tribology-abc<\/a> in\n<a href=\"https:\/\/www.mesys.ch\/?page_id=54\" target=\"_blank\">Mesys.<\/a><br><br>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C17\">17. Hertzov tlak: valj\u010dek-valj\u010dek<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s21.png\" alt=\"slika21\" width=\"auto\" height=\"120\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba21.png\" alt=\"enacba21\" width=\"auto\" height=\"60\">\n<table style=\"width:100%\">\n\t<tbody><tr>\n\t\t<td>\n  <br>\n  \t<b>Izra\u010dun pritisne sile F=?<\/b><br>\n  <input type=\"text\" id=\"txt21a\" style=\"font-size: 12pt\" name=\"text21a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>1<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt21b\" style=\"font-size: 12pt\" name=\"text21b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>2<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt21c\" style=\"font-size: 12pt\" name=\"text21c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>1<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt21d\" style=\"font-size: 12pt\" name=\"text21d\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>2<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt21e\" style=\"font-size: 12pt\" name=\"text21e\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>1<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt21f\" style=\"font-size: 12pt\" name=\"text21f\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>2<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt21g\" style=\"font-size: 12pt\" name=\"text21g\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Najve\u010dji Hertzov tlak p<sub>0<\/sub> [MPa]<br>\n  <input type=\"text\" id=\"txt21h\" style=\"font-size: 12pt\" name=\"text21h\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Dol\u017eina valj\u010dka [mm]<br>\n\n    <p id=\"demo21\"><\/p>\n        <script>\n      function myFunction21() {\n        var x21a = document.getElementById(\"txt21a\").value;\n\t\tvar x21b = document.getElementById(\"txt21b\").value;\n\t\tvar x21c = document.getElementById(\"txt21c\").value;\n\t\tvar x21d = document.getElementById(\"txt21d\").value;\n\t\tvar x21e = document.getElementById(\"txt21e\").value;\n\t\tvar x21f = document.getElementById(\"txt21f\").value;\n\t\tvar x21g = document.getElementById(\"txt21g\").value;\n\t\tvar x21h = document.getElementById(\"txt21h\").value;\n\t\tvar Rzv = Math.pow((1\/Number(x21a)+1\/Number(x21b)),-1);\n\t\tvar Ezv = Math.pow((1-Math.pow(Number(x21e),2))\/Number(x21c)+(1-Math.pow(Number(x21f),2))\/Number(x21d),-1);\n        var rez21 = Math.pow(Number(x21g),2)*Number(Rzv)*Number(x21h)*Math.PI\/Number(Ezv);\n\n\t\tvar Rzv = Rzv.toFixed(2)\n\t\tvar Ezv = Ezv.toFixed(2)\n\t\tvar rez21 = rez21.toFixed(2)\n        document.getElementById(\"demo21\").innerHTML = \"<b>Ekvivalentni Polmer R*<\/b> = \"+ Rzv + \" \" + \"[mm] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ Ezv + \" \" + \"[MPa] <br\/> <b>Pritisna sila F<\/b> = \"+ rez21 + \" \" + \"[N]\";\n      }\n      function Clear21() { lftClear(['txt21a', 'txt21b', 'txt21c', 'txt21d', 'txt21e', 'txt21f', 'txt21g', 'txt21h'], 'demo21'); }\n    <\/script>\n    <button onclick=\"myFunction21()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear21\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear21()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n\t\t <\/td>\n<td>\n<b>Izra\u010dun najve\u010djega Hertzovega tlaka p<sub>0<\/sub>=?<\/b><br>\n\t <input type=\"text\" id=\"txt22a\" style=\"font-size: 12pt\" name=\"text22a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>1<\/sub> [mm]<br>\n\t <input type=\"text\" id=\"txt22b\" style=\"font-size: 12pt\" name=\"text22b\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>2<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt22c\" style=\"font-size: 12pt\" name=\"text22c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>1<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt22d\" style=\"font-size: 12pt\" name=\"text22d\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>2<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt22e\" style=\"font-size: 12pt\" name=\"text22e\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>1<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt22f\" style=\"font-size: 12pt\" name=\"text22f\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>2<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt22g\" style=\"font-size: 12pt\" name=\"text22g\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Pritisna sila F [N]<br>\n  <input type=\"text\" id=\"txt22h\" style=\"font-size: 12pt\" name=\"text22h\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Dol\u017eina valj\u010dka [mm]<br>\n\n    <p id=\"demo22\"><\/p>\n        <script>\n      function myFunction22() {\n        var x22a = document.getElementById(\"txt22a\").value;\n\t\tvar x22b = document.getElementById(\"txt22b\").value;\n\t\tvar x22c = document.getElementById(\"txt22c\").value;\n\t\tvar x22d = document.getElementById(\"txt22d\").value;\n\t\tvar x22e = document.getElementById(\"txt22e\").value;\n\t\tvar x22f = document.getElementById(\"txt22f\").value;\n\t\tvar x22g = document.getElementById(\"txt22g\").value;\n\t\tvar x22h = document.getElementById(\"txt22h\").value;\n\t\tvar Rzv = Math.pow((1\/Number(x22a)+1\/Number(x22b)),-1);\n\n\t\tvar Ezv = Math.pow((1-Math.pow(Number(x22e),2))\/Number(x22c)+(1-Math.pow(Number(x22f),2))\/Number(x22d),-1);\n\t\tvar a = Math.pow((4*Number(x22g)*Number(Rzv))\/(Number(x22h)*Math.PI*Number(Ezv)),1\/2);\n\t\tvar rez22 = Math.pow((Number(Ezv)*Number(x22g)\/(Number(Rzv)*Number(x22h)*Math.PI)),1\/2);\n\n\t\tvar Rzv = Rzv.toFixed(2)\n\t\tvar Ezv = Ezv.toFixed(2)\n\t\tvar rez22 = rez22.toFixed(2)\n        document.getElementById(\"demo22\").innerHTML = \"<b>Ekvivalentni Polmer R*<\/b> = \"+ Rzv + \" \" + \"[mm] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ Ezv + \" \" + \"[MPa] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ a + \" \" + \"[MPa] <br\/>\";\n\t\t        document.getElementById(\"demo22\").innerHTML = \"<b>Ekvivalentni Polmer R*<\/b> = \"+ Rzv + \" \" + \"[mm] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ Ezv + \" \" + \"[MPa] <br\/> <b>Najve\u010dji Hertzov tlak p<sub>0<\/sub> <\/b> = \"+ rez22 + \" \" + \"[MPa]\";\n\n      }\n      function Clear22() { lftClear(['txt22a', 'txt22b', 'txt22c', 'txt22d', 'txt22e', 'txt22f', 'txt22g', 'txt22h'], 'demo22'); }\n    <\/script>\n\t<button onclick=\"myFunction22()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear22\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear22()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<\/td>\n  <\/tr>\n\t\t <\/tbody><\/table>\n\n<br>\nRe\u0161itve lahko preverite na spletnih straneh\n<a href=\"http:\/\/www.tribology-abc.com\/calculators\/e2_3.htm\" target=\"_blank\">Tribology-abc<\/a> in\n<a href=\"https:\/\/www.mesys.ch\/?page_id=54\" target=\"_blank\">Mesys.<\/a><br><br>\n<hr>\n<!-------------------------------------------------------------------->\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C18\">18. Hertzov tlak: valj\u010dek-ravnina<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/s19.png\" alt=\"slika19\" width=\"auto\" height=\"80\">\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/enacba19.png\" alt=\"enacba19\" width=\"auto\" height=\"60\">\n<table style=\"width:100%\">\n\t<tbody><tr>\n\t\t<td>\n  <br>\n  \t<b>Izra\u010dun pritisne sile F=?<\/b><br>\n  <input type=\"text\" id=\"txt19a\" style=\"font-size: 12pt\" name=\"text19a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>1<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt19c\" style=\"font-size: 12pt\" name=\"text19c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>1<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt19d\" style=\"font-size: 12pt\" name=\"text19d\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>2<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt19e\" style=\"font-size: 12pt\" name=\"text19e\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>1<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt19f\" style=\"font-size: 12pt\" name=\"text19f\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>2<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt19g\" style=\"font-size: 12pt\" name=\"text19g\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Najve\u010dji Hertzov tlak p<sub>0<\/sub> [MPa]<br>\n  <input type=\"text\" id=\"txt19h\" style=\"font-size: 12pt\" name=\"text19h\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Dol\u017eina valj\u010dka [mm]<br>\n\n    <p id=\"demo19\"><\/p>\n        <script>\n      function myFunction19() {\n        var x19a = document.getElementById(\"txt19a\").value;\n\t\tvar x19c = document.getElementById(\"txt19c\").value;\n\t\tvar x19d = document.getElementById(\"txt19d\").value;\n\t\tvar x19e = document.getElementById(\"txt19e\").value;\n\t\tvar x19f = document.getElementById(\"txt19f\").value;\n\t\tvar x19g = document.getElementById(\"txt19g\").value;\n\t\tvar x19h = document.getElementById(\"txt19h\").value;\n\t\tvar Rzv = Math.pow((1\/Number(x19a)),-1);\n\t\tvar Ezv = Math.pow((1-Math.pow(Number(x19e),2))\/Number(x19c)+(1-Math.pow(Number(x19f),2))\/Number(x19d),-1);\n        var rez19 = Math.pow(Number(x19g),2)*Number(Rzv)*Number(x19h)*Math.PI\/Number(Ezv);\n\n\t\tvar Rzv = Rzv.toFixed(2)\n\t\tvar Ezv = Ezv.toFixed(2)\n\t\tvar rez19 = rez19.toFixed(2)\n        document.getElementById(\"demo19\").innerHTML = \"<b>Ekvivalentni Polmer R*<\/b> = \"+ Rzv + \" \" + \"[mm] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ Ezv + \" \" + \"[MPa] <br\/> <b>Pritisna sila F<\/b> = \"+ rez19 + \" \" + \"[N]\";\n      }\n      function Clear19() { lftClear(['txt19a', 'txt19c', 'txt19d', 'txt19e', 'txt19f', 'txt19g', 'txt19h'], 'demo19'); }\n    <\/script>\n    <button onclick=\"myFunction19()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear19\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear19()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n\t\t <\/td>\n<td>\n<b>Izra\u010dun najve\u010djega Hertzovega tlaka p<sub>0<\/sub>=?<\/b><br>\n\t <input type=\"text\" id=\"txt20a\" style=\"font-size: 12pt\" name=\"text20a\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Polmer kroglice R<sub>1<\/sub> [mm]<br>\n  <input type=\"text\" id=\"txt20c\" style=\"font-size: 12pt\" name=\"text20c\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>1<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt20d\" style=\"font-size: 12pt\" name=\"text20d\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Modul elasti\u010dnosti E<sub>2<\/sub> [MPa], <u>(jeklo: E=210000 MPa)<\/u><br>\n  <input type=\"text\" id=\"txt20e\" style=\"font-size: 12pt\" name=\"text20e\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>1<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt20f\" style=\"font-size: 12pt\" name=\"text20f\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-poissonovo \u0161tevilo \ud835\udf08<sub>2<\/sub> [\/], <u>(jeklo: \ud835\udf08=0.3)<\/u><br>\n  <input type=\"text\" id=\"txt20g\" style=\"font-size: 12pt\" name=\"text20g\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Pritisna sila F [N]<br>\n  <input type=\"text\" id=\"txt20h\" style=\"font-size: 12pt\" name=\"text20h\" placeholder=\"Vnesi \u0161tevilo (dec. pika)\">-Dol\u017eina valj\u010dka [mm]<br>\n\n    <p id=\"demo20\"><\/p>\n        <script>\n      function myFunction20() {\n        var x20a = document.getElementById(\"txt20a\").value;\n\t\tvar x20c = document.getElementById(\"txt20c\").value;\n\t\tvar x20d = document.getElementById(\"txt20d\").value;\n\t\tvar x20e = document.getElementById(\"txt20e\").value;\n\t\tvar x20f = document.getElementById(\"txt20f\").value;\n\t\tvar x20g = document.getElementById(\"txt20g\").value;\n\t\tvar x20h = document.getElementById(\"txt20h\").value;\n\t\tvar Rzv = Math.pow((1\/Number(x20a)),-1);\n\t\tvar Ezv = Math.pow((1-Math.pow(Number(x20e),2))\/Number(x20c)+(1-Math.pow(Number(x20f),2))\/Number(x20d),-1);\n\t\tvar a = Math.pow((4*Number(x20g)*Number(Rzv))\/(Number(x20h)*Math.PI*Number(Ezv)),1\/2);\n\t\tvar rez20 = Math.pow((Number(Ezv)*Number(x20g)\/(Number(Rzv)*Number(x20h)*Math.PI)),1\/2);\n\n\t\tvar Rzv = Rzv.toFixed(2)\n\t\tvar Ezv = Ezv.toFixed(2)\n\t\tvar rez20 = rez20.toFixed(2)\n        document.getElementById(\"demo20\").innerHTML = \"<b>Ekvivalentni Polmer R*<\/b> = \"+ Rzv + \" \" + \"[mm] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ Ezv + \" \" + \"[MPa] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ a + \" \" + \"[MPa] <br\/>\";\n\t\t        document.getElementById(\"demo20\").innerHTML = \"<b>Ekvivalentni Polmer R*<\/b> = \"+ Rzv + \" \" + \"[mm] <br\/> <b>Ekvivalentni modul elasti\u010dnosti E*<\/b> = \"+ Ezv + \" \" + \"[MPa] <br\/> <b>Najve\u010dji Hertzov tlak p<sub>0<\/sub> <\/b> = \"+ rez20 + \" \" + \"[MPa]\";\n\n      }\n      function Clear20() { lftClear(['txt20a', 'txt20c', 'txt20d', 'txt20e', 'txt20f', 'txt20g', 'txt20h'], 'demo20'); }\n    <\/script>\n\t<button onclick=\"myFunction20()\">Izra\u010dunaj<\/button>\n    <input id=\"btnClear20\" type=\"button\" value=\"Izbri\u0161i vhodne podatke\" onclick=\"Clear20()\">\n         <a href=\"#C0\">Vrni se na vrh strani!<\/a>\n<\/td>\n  <\/tr>\n\t\t <\/tbody><\/table>\n\n<br>\nRe\u0161itve lahko preverite na spletnih straneh\n<a href=\"http:\/\/www.tribology-abc.com\/calculators\/e2_3.htm\" target=\"_blank\">Tribology-abc<\/a> in\n<a href=\"https:\/\/www.mesys.ch\/?page_id=54\" target=\"_blank\">Mesys.<\/a><br><br>\n<span style=\"font-size:1.33em; font-weight:bold\" id=\"C19\">19. Prilaga A: Jeklene cevi za cevne navoje<br><br><\/span>\n<img decoding=\"async\" src=\"\/lft\/img\/calc\/Priloga-Jeklene cevi za cevne navoje.png\" alt=\"slika19\" width=\"auto\" height=\"500\">\n<br>\n<a>VIR: Krautov strojni\u0161ki priro\u010dnik, Petnajsta slovenska izdaja, 2011<\/a>\n<span style=\"font-size:12px; font-weight:bold\">\n<b>Vpra\u0161anja in dodatne informacije:<\/b>\n<br> Ervin Strm\u010dnik\n<br>\n<a href=\"mailto:lft@fs.uni-lj.si\">ervin.strmcnik@fs.uni-lj.si<\/a>\n<\/span>\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-258","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/web.fs.uni-lj.si\/lft\/wp-json\/wp\/v2\/pages\/258","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/web.fs.uni-lj.si\/lft\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/web.fs.uni-lj.si\/lft\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/web.fs.uni-lj.si\/lft\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/web.fs.uni-lj.si\/lft\/wp-json\/wp\/v2\/comments?post=258"}],"version-history":[{"count":10,"href":"https:\/\/web.fs.uni-lj.si\/lft\/wp-json\/wp\/v2\/pages\/258\/revisions"}],"predecessor-version":[{"id":868,"href":"https:\/\/web.fs.uni-lj.si\/lft\/wp-json\/wp\/v2\/pages\/258\/revisions\/868"}],"wp:attachment":[{"href":"https:\/\/web.fs.uni-lj.si\/lft\/wp-json\/wp\/v2\/media?parent=258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}