{"id":17183,"date":"2026-06-30T09:34:11","date_gmt":"2026-06-30T09:34:11","guid":{"rendered":"https:\/\/www.dgcrane.com\/?p=17183"},"modified":"2026-06-30T09:35:20","modified_gmt":"2026-06-30T09:35:20","slug":"crane-main-girder-section-moment-of-inertia-calculator","status":"publish","type":"post","link":"https:\/\/www.dgcrane.com\/fr\/crane-main-girder-section-moment-of-inertia-calculator\/","title":{"rendered":"Calculateur de moment d&#39;inertie de la section de poutre principale de la grue"},"content":{"rendered":"<div id=\"calculator\">\n    <style>\n        \/* \u4ec5\u4f5c\u7528\u4e8e#calculator\u5185\u90e8\uff0c\u5168\u5c40\u65e0\u6c61\u67d3\uff0c\u56fa\u5b9a\u989c\u8272\u53d8\u91cf *\/\n        #calculator {\n            --primary-color: #0a3487;\n            --primary-hover: #F58423;\n            --error-color: #e53935;\n            --bg-color: #EAEEF7;\n            --text-color: #4a4a4a;\n            max-width: 600px;\n            padding: 30px;\n            background: var(--bg-color);\n            font-family: Arial, sans-serif;\n            color: var(--text-color);\n            box-sizing: border-box;\n        }\n        #calculator .calc-title {\n            font-size: 18px;\n            margin: 0 0 8px 0;\n            font-weight: 600;\n        }\n        #calculator .sub-title {\n            font-size: 16px;\n            margin: 10px 0 6px;\n            font-weight: 600;\n            border-bottom: 1px solid #ccc;\n            padding-bottom: 3px;\n        }\n        \/* \u8f93\u5165\u533a\u57df\u4e24\u5217\u5e03\u5c40 *\/\n        #calculator .input-grid {\n            display: grid;\n            grid-template-columns: 1fr 1fr;\n            gap: 10px;\n            margin-bottom: 8px;\n        }\n        #calculator .field-wrap {\n            margin-bottom: 6px;\n        }\n        #calculator label {\n            display: block;\n            font-size: 14px;\n            margin-bottom: 3px;\n        }\n        #calculator input {\n            width: 100%;\n            height: 36px;\n            font-size: 16px;\n            padding: 0 10px;\n            border: 1px solid #ccc;\n            border-radius: 0;\n            box-sizing: border-box;\n            transition: 0.2s ease;\n        }\n        #calculator input:focus {\n            outline: none;\n            border: 2px solid var(--primary-color);\n        }\n        #calculator input.error {\n            border: 2px solid var(--error-color);\n        }\n        #calculator .error-msg {\n            font-size: 12px;\n            color: var(--error-color);\n            margin-top: 1px;\n            display: none;\n        }\n        #calculator .btn-group {\n            display: flex;\n            gap: 10px;\n            margin: 10px 0 8px;\n        }\n        #calculator button {\n            flex: 1;\n            height: 34px;\n            line-height: 34px;\n            font-size: 14px;\n            border: none;\n            border-radius: 0;\n            cursor: pointer;\n            transition: 0.2s ease;\n        }\n        #calculator .calc-btn {\n            background: var(--primary-color);\n            color: #fff;\n        }\n        #calculator .calc-btn:hover {\n            background: var(--primary-hover);\n        }\n        #calculator .reset-btn {\n            background: #fff;\n            color: var(--primary-color);\n            border: 1px solid var(--primary-color);\n        }\n        \/* \u4e2d\u95f4\u53c2\u6570 \u6bcf\u63924\u5217\u7d27\u51d1\u5e03\u5c40 *\/\n        #calculator .mid-grid-4 {\n            display: grid;\n            grid-template-columns: repeat(4, 1fr);\n            gap: 8px;\n            margin: 4px 0;\n        }\n        \/* \u5f62\u5fc3\u5355\u72ec\u5c45\u4e2d\u7f51\u683c *\/\n        #calculator .mid-grid-center {\n            display: grid;\n            grid-template-columns: 1fr;\n            max-width: 280px;\n            margin: 4px auto;\n        }\n        #calculator .result-label {\n            font-size: 13px;\n            margin-bottom: 2px;\n        }\n        #calculator .result-label.final-label {\n            font-size: 16px;\n            font-weight: 600;\n            margin-bottom: 4px;\n        }\n        #calculator .result-value {\n            font-size: 18px;\n            font-weight: 600;\n            word-break: break-all;\n            background: #fff;\n            padding: 4px 8px;\n            border:1px solid #ccc;\n        }\n        \/* \u6700\u7ec8\u7ed3\u679c\u5355\u72ec\u884c *\/\n        #calculator .final-row {\n            margin-top:4px;\n        }\n        \/* \u79fb\u52a8\u7aef\u9002\u914d 768px\u4ee5\u4e0b *\/\n        @media (max-width: 768px) {\n            #calculator .input-grid {\n                grid-template-columns: 1fr;\n            }\n            #calculator .mid-grid-4 {\n                grid-template-columns: repeat(2, 1fr);\n            }\n            #calculator input {\n                height: 0.7rem;\n                font-size: 0.28rem;\n            }\n            #calculator button {\n                height: 0.7rem;\n                line-height: 0.7rem;\n                font-size: 0.28rem;\n            }\n            #calculator .btn-group {\n                flex-direction: column;\n            }\n            #calculator button {\n                width: 100%;\n            }\n        }\n    <\/style>\n\n    <!-- \u6a21\u57571\uff1a\u624b\u52a8\u8f93\u5165\u539f\u59cb\u622a\u9762\u5c3a\u5bf8\uff0c\u6807\u9898\u4e0b\u65b9\u65e0\u591a\u4f59\u7a7a\u767d -->\n    <h4 class=\"sub-title\">1. Dimensions de la section de saisie manuelle<\/h4>\n    <div class=\"input-grid\">\n        <div class=\"field-wrap\">\n            <label for=\"h\">Hauteur de poutre h (cm)<\/label>\n            <input type=\"number\" step=\"0.01\" id=\"h\" placeholder=\"par exemple 111,6\">\n            <div class=\"error-msg\" id=\"err-h\">Veuillez saisir un num\u00e9ro valide<\/div>\n        <\/div>\n        <div class=\"field-wrap\">\n            <label for=\"B1\">Largeur de la bride sup\u00e9rieure B1 (cm)<\/label>\n            <input type=\"number\" step=\"0.01\" id=\"B1\" placeholder=\"par exemple 50\">\n            <div class=\"error-msg\" id=\"err-B1\">Veuillez saisir un num\u00e9ro valide<\/div>\n        <\/div>\n        <div class=\"field-wrap\">\n            <label for=\"B2\">Largeur de la bride inf\u00e9rieure B2 (cm)<\/label>\n            <input type=\"number\" step=\"0.01\" id=\"B2\" placeholder=\"par exemple 50\">\n            <div class=\"error-msg\" id=\"err-B2\">Veuillez saisir un num\u00e9ro valide<\/div>\n        <\/div>\n        <div class=\"field-wrap\">\n            <label for=\"t1\">\u00c9paisseur de la bride sup\u00e9rieure t1 (cm)<\/label>\n            <input type=\"number\" step=\"0.01\" id=\"t1\" placeholder=\"par exemple 0,8\">\n            <div class=\"error-msg\" id=\"err-t1\">Veuillez saisir un num\u00e9ro valide<\/div>\n        <\/div>\n        <div class=\"field-wrap\">\n            <label for=\"t2\">\u00c9paisseur de la bride inf\u00e9rieure t2 (cm)<\/label>\n            <input type=\"number\" step=\"0.01\" id=\"t2\" placeholder=\"par exemple 0,8\">\n            <div class=\"error-msg\" id=\"err-t2\">Veuillez saisir un num\u00e9ro valide<\/div>\n        <\/div>\n        <div class=\"field-wrap\">\n            <label for=\"delta1\">\u00c9paisseur de la bande principale \u03b41 (cm)<\/label>\n            <input type=\"number\" step=\"0.01\" id=\"delta1\" placeholder=\"par exemple 0,6\">\n            <div class=\"error-msg\" id=\"err-delta1\">Veuillez saisir un num\u00e9ro valide<\/div>\n        <\/div>\n        <div class=\"field-wrap\">\n            <label for=\"delta2\">\u00c9paisseur de la toile secondaire \u03b42 (cm)<\/label>\n            <input type=\"number\" step=\"0.01\" id=\"delta2\" placeholder=\"par exemple 0,6\">\n            <div class=\"error-msg\" id=\"err-delta2\">Veuillez saisir un num\u00e9ro valide<\/div>\n        <\/div>\n    <\/div>\n\n    <!-- \u6a21\u57572\uff1a\u81ea\u52a8\u8ba1\u7b97\u4e2d\u95f4\u53c2\u6570 \u6309\u94ae\u4e0a\u65b9 -->\n    <h4 class=\"sub-title\">2. Param\u00e8tres interm\u00e9diaires calcul\u00e9s automatiquement<\/h4>\n    <!-- A1 A2 A3 A4 \u4e00\u63924\u4e2a -->\n    <div class=\"mid-grid-4\">\n        <div class=\"result-col\">\n            <div class=\"result-label\">A1 (cm\u00b2)<\/div>\n            <div class=\"result-value\" id=\"res-A1\">&#8212;<\/div>\n        <\/div>\n        <div class=\"result-col\">\n            <div class=\"result-label\">A2 (cm\u00b2)<\/div>\n            <div class=\"result-value\" id=\"res-A2\">&#8212;<\/div>\n        <\/div>\n        <div class=\"result-col\">\n            <div class=\"result-label\">A3 (cm\u00b2)<\/div>\n            <div class=\"result-value\" id=\"res-A3\">&#8212;<\/div>\n        <\/div>\n        <div class=\"result-col\">\n            <div class=\"result-label\">A4 (cm\u00b2)<\/div>\n            <div class=\"result-value\" id=\"res-A4\">&#8212;<\/div>\n        <\/div>\n    <\/div>\n    <!-- d1 d2 d3 d4 \u4e00\u63924\u4e2a -->\n    <div class=\"mid-grid-4\">\n        <div class=\"result-col\">\n            <div class=\"result-label\">d1<\/div>\n            <div class=\"result-value\" id=\"res-d1\">&#8212;<\/div>\n        <\/div>\n        <div class=\"result-col\">\n            <div class=\"result-label\">d2<\/div>\n            <div class=\"result-value\" id=\"res-d2\">&#8212;<\/div>\n        <\/div>\n        <div class=\"result-col\">\n            <div class=\"result-label\">d3<\/div>\n            <div class=\"result-value\" id=\"res-d3\">&#8212;<\/div>\n        <\/div>\n        <div class=\"result-col\">\n            <div class=\"result-label\">d4<\/div>\n            <div class=\"result-value\" id=\"res-d4\">&#8212;<\/div>\n        <\/div>\n    <\/div>\n    <!-- \u6574\u4f53\u5f62\u5fc3\u5355\u72ec\u5c45\u4e2d\u5c55\u793a -->\n    <div class=\"mid-grid-center\">\n        <div class=\"result-col\">\n            <div class=\"result-label\">Centre global \u0233<\/div>\n            <div class=\"result-value\" id=\"res-ybar\">&#8212;<\/div>\n        <\/div>\n    <\/div>\n\n    <!-- \u64cd\u4f5c\u6309\u94ae -->\n    <div class=\"btn-group\">\n        <button class=\"calc-btn\" id=\"calc-trigger\">Calculer<\/button>\n        <button class=\"reset-btn\" id=\"calc-reset\">R\u00e9initialiser tout<\/button>\n    <\/div>\n\n    <!-- \u65e0\u4e09\u7ea7\u6807\u9898\uff0cIx\u6807\u7b7e\u540ch4\u5b57\u53f7 -->\n    <div class=\"final-row\">\n        <div class=\"result-label final-label\">Moment d&#39;inertie Ix (cm\u2074) :<\/div>\n        <div class=\"result-value\" id=\"res-Ix\">&#8212;<\/div>\n    <\/div>\n\n    <script>\n        const BoxBeamCalc = {\n            setError(inputId, errId) {\n                const input = document.getElementById(inputId);\n                const errBox = document.getElementById(errId);\n                input.classList.add('error');\n                errBox.style.display = 'block';\n            },\n            clearError(inputId, errId) {\n                const input = document.getElementById(inputId);\n                const errBox = document.getElementById(errId);\n                input.classList.remove('error');\n                errBox.style.display = 'none';\n            },\n            validateInput(inputId, errId) {\n                const val = document.getElementById(inputId).value.trim();\n                if (val === '') return false;\n                const num = parseFloat(val);\n                if (isNaN(num) || num <= 0) {\n                    this.setError(inputId, errId);\n                    return false;\n                }\n                this.clearError(inputId, errId);\n                return num;\n            },\n            resetAll() {\n                const inputIds = ['h','B1','B2','t1','t2','delta1','delta2'];\n                const errIds = ['err-h','err-B1','err-B2','err-t1','err-t2','err-delta1','err-delta2'];\n                inputIds.forEach((id, idx) => {\n                    document.getElementById(id).value = '';\n                    this.clearError(id, errIds[idx]);\n                });\n                document.getElementById('res-A1').innerText = '--';\n                document.getElementById('res-A2').innerText = '--';\n                document.getElementById('res-A3').innerText = '--';\n                document.getElementById('res-A4').innerText = '--';\n                document.getElementById('res-ybar').innerText = '--';\n                document.getElementById('res-d1').innerText = '--';\n                document.getElementById('res-d2').innerText = '--';\n                document.getElementById('res-d3').innerText = '--';\n                document.getElementById('res-d4').innerText = '--';\n                document.getElementById('res-Ix').innerText = '--';\n            },\n            compute() {\n                const h = this.validateInput('h','err-h');\n                const B1 = this.validateInput('B1','err-B1');\n                const B2 = this.validateInput('B2','err-B2');\n                const t1 = this.validateInput('t1','err-t1');\n                const t2 = this.validateInput('t2','err-t2');\n                const delta1 = this.validateInput('delta1','err-delta1');\n                const delta2 = this.validateInput('delta2','err-delta2');\n                if(!h||!B1||!B2||!t1||!t2||!delta1||!delta2) return;\n\n                const hw = h - t1 - t2;\n                if(hw <= 0) return;\n\n                const A1 = B1 * t1;\n                const A2 = B2 * t2;\n                const A3 = hw * delta1;\n                const A4 = hw * delta2;\n                const totalA = A1 + A2 + A3 + A4;\n\n                const y1 = h - t1\/2;\n                const y2 = t2\/2;\n                const y3 = t2 + hw\/2;\n                const y4 = t2 + hw\/2;\n\n                const yBar = (A1*y1 + A2*y2 + A3*y3 + A4*y4) \/ totalA;\n\n                const d1 = yBar - y1;\n                const d2 = yBar - y2;\n                const d3 = yBar - y3;\n                const d4 = yBar - y4;\n\n                const Iself1 = (B1 * Math.pow(t1,3)) \/ 12;\n                const Iself2 = (B2 * Math.pow(t2,3)) \/ 12;\n                const Iself3 = (delta1 * Math.pow(hw,3)) \/ 12;\n                const Iself4 = (delta2 * Math.pow(hw,3)) \/ 12;\n\n                const Ix = Iself1 + A1*Math.pow(d1,2)\n                         + Iself2 + A2*Math.pow(d2,2)\n                         + Iself3 + A3*Math.pow(d3,2)\n                         + Iself4 + A4*Math.pow(d4,2);\n\n                document.getElementById('res-A1').innerText = A1.toFixed(2);\n                document.getElementById('res-A2').innerText = A2.toFixed(2);\n                document.getElementById('res-A3').innerText = A3.toFixed(2);\n                document.getElementById('res-A4').innerText = A4.toFixed(2);\n                document.getElementById('res-ybar').innerText = yBar.toFixed(2);\n\n                document.getElementById('res-d1').innerText = d1.toFixed(2);\n                document.getElementById('res-d2').innerText = d2.toFixed(2);\n                document.getElementById('res-d3').innerText = d3.toFixed(2);\n                document.getElementById('res-d4').innerText = d4.toFixed(2);\n\n                document.getElementById('res-Ix').innerText = Ix.toFixed(2);\n            },\n            bindEvents() {\n                document.getElementById('calc-trigger').addEventListener('click', ()=>this.compute());\n                document.getElementById('calc-reset').addEventListener('click', ()=>this.resetAll());\n                const inputList = document.querySelectorAll('#calculator input');\n                inputList.forEach(input => {\n                    const errId = 'err-' + input.id;\n                    input.addEventListener('input', ()=>this.clearError(input.id, errId));\n                });\n            }\n        };\n        document.addEventListener('DOMContentLoaded', ()=>BoxBeamCalc.bindEvents());\n    <\/script>\n<\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Mode d&#39;emploi<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Les param\u00e8tres de ce calculateur de moment d&#39;inertie de la section de poutre principale de la grue <br>sont principalement applicables aux sections creuses rectangulaires.<\/li>\n\n\n\n<li>je<sub>x<\/sub> correspond \u00e0 la charge verticale et \u00e0 la flexion verticale de la grue principale <br>poutre ; cette valeur peut \u00eatre directement substitu\u00e9e dans le calcul de la poutre principale <br>D\u00e9flexion de la poutre.<\/li>\n<\/ul>\n\n\n\n<div style=\"height:55px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Formule de calcul du moment d&#39;inertie de la section de poutre principale de la grue<\/h2>\n\n\n\n<!DOCTYPE html>\n<html lang=\"zh-CN\">\n<head>\n    <meta charset=\"UTF-8\">\n    <title>\u8d77\u91cd\u673a\u4e3b\u6881\u622a\u9762\u60ef\u6027\u77e9\u516c\u5f0f<\/title>\n    <!-- MathJax \u6e32\u67d3\u914d\u7f6e -->\n    <script>\n        window.MathJax = {\n            tex: {\n                inlineMath: [['$', '$'], ['\\\\(', '\\\\)']],\n                displayMath: [['$$', '$$'], ['\\\\[', '\\\\]']]\n            },\n            svg: { fontCache: 'global' }\n        };\n    <\/script>\n    <script id=\"MathJax-script\" async src=\"https:\/\/cdn.jsdelivr.net\/npm\/mathjax@3\/es5\/tex-mml-chtml.js\"><\/script>\n    <style>\n        .formula {\n            font-family: \"Microsoft YaHei\", sans-serif;\n            font-size: 1.2em;\n            margin: 20px 0;\n            padding: 15px;\n            background: #ffffff;\n            border-radius: 8px;\n            \/* \u5bb9\u5668\u5185\u5bb9\u5de6\u5bf9\u9f50 *\/\n            text-align: left;\n        }\n        \/* \u5f3a\u5236 MathJax \u5757\u516c\u5f0f\u5de6\u5bf9\u9f50 *\/\n        .mjx-container[jax=\"CHTML\"][display=\"true\"],\n        .mjx-container[jax=\"SVG\"][display=\"true\"] {\n            text-align: left !important;\n            margin: 0 !important;\n        }\n    <\/style>\n<\/head>\n<body>\n\n<div class=\"formula\">\n\\[ \\begin{aligned} I_x &amp;= \\frac{B_1 \\times t_1^3}{12} + A_1 d_1^2 \\\\ &amp;\\quad + \\frac{B_2 \\times t_2^3}{12} + A_2 d_2^2 \\\\ &amp;\\quad + \\frac{\\delta_1 \\times h_w^3}{12} + A_3 d_3^2 \\\\ &amp;\\quad + \\frac{\\delta_2 \\times h_w^3}{12} + A_4 d_4^2 \\end{aligned} \\]\n<\/div>\n\n<\/body>\n<\/html>\n\n\n\n<ul class=\"wp-block-list\">\n<li>B1 : Largeur de la bride sup\u00e9rieure (unit\u00e9 : cm)<\/li>\n\n\n\n<li>B2 : Largeur de la bride inf\u00e9rieure (unit\u00e9 : cm)<\/li>\n\n\n\n<li>t1 : \u00c9paisseur de la bride sup\u00e9rieure (unit\u00e9 : cm)<\/li>\n\n\n\n<li>t2 : \u00c9paisseur de la bride inf\u00e9rieure (unit\u00e9 : cm)<\/li>\n\n\n\n<li>A1\u00a0: Surface de la bride sup\u00e9rieure (unit\u00e9\u00a0: cm\u00b2)<sup>2<\/sup>)<\/li>\n\n\n\n<li>A2\u00a0: Surface de la bride inf\u00e9rieure (unit\u00e9\u00a0: cm\u00b2)<sup>2<\/sup>)<\/li>\n\n\n\n<li>A3\u00a0: Surface principale (unit\u00e9\u00a0: cm)<sup>2<\/sup>)<\/li>\n\n\n\n<li>A4\u00a0: Sous-surface (unit\u00e9\u00a0: cm)<sup>2<\/sup>)<\/li>\n\n\n\n<li>d1\u00a0: Distance entre la bride sup\u00e9rieure et le centre de gravit\u00e9 de la section<\/li>\n\n\n\n<li>d2\u00a0: Distance entre la bride inf\u00e9rieure et le centre de gravit\u00e9 de la section<\/li>\n\n\n\n<li>d3\u00a0: Distance entre le r\u00e9seau principal et le centre de gravit\u00e9 de la section<\/li>\n\n\n\n<li>d4\u00a0: Distance entre le r\u00e9seau secondaire et le centre de gravit\u00e9 de la section<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Distance entre la plaque et le centre de gravit\u00e9 de la section<\/h3>\n\n\n\n<!DOCTYPE html>\n<html lang=\"zh-CN\">\n<head>\n    <meta charset=\"UTF-8\">\n    <title>\u5404\u677f\u5f62\u5fc3\u8ddd\u79bb\u516c\u5f0f<\/title>\n    <!-- MathJax \u6e32\u67d3\u914d\u7f6e -->\n    <script>\n        window.MathJax = {\n            tex: {\n                inlineMath: [['$', '$'], ['\\\\(', '\\\\)']],\n                displayMath: [['$$', '$$'], ['\\\\[', '\\\\]']]\n            },\n            svg: { fontCache: 'global' }\n        };\n    <\/script>\n    <script id=\"MathJax-script\" async src=\"https:\/\/cdn.jsdelivr.net\/npm\/mathjax@3\/es5\/tex-mml-chtml.js\"><\/script>\n    <style>\n        .formula {\n            font-family: \"Microsoft YaHei\", sans-serif;\n            font-size: 1.2em;\n            margin: 20px 0;\n            padding: 15px;\n            background: #ffffff;\n            border-radius: 8px;\n        }\n    <\/style>\n<\/head>\n<body>\n<div class=\"formula\">\n\\[ \\begin{aligned} d_1 &amp;= \\bar{y} \u2013 y_1 \\\\ d_2 &amp;= \\bar{y} \u2013 y_2 \\\\ d_3 &amp;= \\bar{y} \u2013 y_3 \\\\ d_4 &amp;= \\bar{y} \u2013 y_4 \\end{aligned} \\]\n<\/div>\n<\/body>\n<\/html>\n\n\n\n<ul class=\"wp-block-list\">\n<li>y1\/y2\/y3\/y4\u00a0: Coordonn\u00e9e Y du centre de gravit\u00e9 de chaque plaque en coupe transversale<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Centro\u00efde de section<\/h3>\n\n\n\n<!DOCTYPE html>\n<html lang=\"zh-CN\">\n<head>\n    <meta charset=\"UTF-8\">\n    <!-- MathJax \u6e32\u67d3\u914d\u7f6e -->\n    <script>\n        window.MathJax = {\n            tex: {\n                inlineMath: [['$', '$'], ['\\\\(', '\\\\)']],\n                displayMath: [['$$', '$$'], ['\\\\[', '\\\\]']]\n            },\n            svg: { fontCache: 'global' }\n        };\n    <\/script>\n    <script id=\"MathJax-script\" async src=\"https:\/\/cdn.jsdelivr.net\/npm\/mathjax@3\/es5\/tex-mml-chtml.js\"><\/script>\n    <style>\n        .formula {\n            font-family: \"Microsoft YaHei\", sans-serif;\n            font-size: 1.2em;\n            margin: 20px 0;\n            padding: 15px;\n            background: #ffffff;\n            border-radius: 8px;\n        }\n    <\/style>\n<\/head>\n<body>\n<div class=\"formula\">\n\\[ \\bar{y} = h_x = \\frac{A_1 y_1 + A_2 y_2 + A_3 y_3 + A_4 y_4}{A_1 + A_2 + A_3 + A_4} \\]\n<\/div>\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\">Produits concern\u00e9s<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ponts roulants<\/li>\n\n\n\n<li>Grue Portique<\/li>\n\n\n\n<li>Portiques de chantier naval<\/li>\n\n\n\n<li>Grues portiques sur rails (RMG)<\/li>\n\n\n\n<li>Grues portiques sur pneus (RTG)<\/li>\n\n\n\n<li>Grues m\u00e9tallurgiques<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"Le calculateur de moment d&#39;inertie de la poutre principale d&#39;une grue calcule la rigidit\u00e9 en flexion de cette poutre. Un moment d&#39;inertie plus \u00e9lev\u00e9 indique une plus grande rigidit\u00e9 et une moindre d\u00e9formation. Pour les ponts roulants et les portiques, il d\u00e9termine directement la capacit\u00e9 de charge et \u00e9value les risques de d\u00e9formation plastique et de rupture. Ce calculateur prend \u00e9galement en compte la fl\u00e8che afin de pr\u00e9venir la distorsion et le balancement de la poutre lors des phases de d\u00e9placement et de freinage.","protected":false},"author":8,"featured_media":17193,"parent":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"single-onlinetools.php","format":"standard","meta":{"_acf_changed":false,"rank_math_lock_modified_date":false,"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[1059],"tags":[],"class_list":["post-17183","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-online-tools"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/posts\/17183"}],"collection":[{"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/comments?post=17183"}],"version-history":[{"count":15,"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/posts\/17183\/revisions"}],"predecessor-version":[{"id":17200,"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/posts\/17183\/revisions\/17200"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/media\/17193"}],"wp:attachment":[{"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/media?parent=17183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/categories?post=17183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dgcrane.com\/fr\/wp-json\/wp\/v2\/tags?post=17183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}