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bodyBgs[3] = "/images/banner/s4.jpg"; bodyBgs[4] = "/images/banner/s5.jpg"; var randomBgIndex = Math.round( Math.random() * 4 ); //输出随机的背景图 document.write('<style>.banner{background:url(' + bodyBgs[randomBgIndex] + ') no-repeat 50% bottom}</style>'); //]]> </script> <section> <div class="banner" style="height:160px;"> </div> </section> <!-- 面包屑导航开始 --> <div class="container "> <nav class="sub_menu"> <ol class="breadcrumb"><span class="glyphicon glyphicon-list"></span> <li><a href="/">网站首页</a></li> <li><a title="技术文章" href="/bethel/NC">技术文章</a></li> <li><a title="数控文章" href="/bethel/news">数控文章</a></li> </ol> </nav> </div> <!--/sub_menu--><!-- 面包屑导航结束 --> <!-- 页面标题开始 --> <div class="title"> <h3><a>加工中心立柱的计算模态分析<small></small></a></h3> </div> <!-- 页面标题结束 --> <hr class="featurette-divider"> <!-- 中部开始 --> <div class="container"> <!-- 正文 --> <div class="lead" id="print"> <p>加工中心立柱的计算模态分析<br /> 在动态分析领域，结构的模态分析的使用是非常广泛的，其主要目的是获取结构的 振型、固有频率等模态参数。模态分析方法主要分析计算模态分析和试验模态分析两种， 而计算与试验的相互结合、相互验证更有助于得出准确的结果[48]。通过观察振型可以知 道在某个固有频率（共振频率）下结构的变形趋势，进而可以从这些较弱的部分来加强 结构的刚性。其次还可以确定支撑结构和其它结构放置时的理想位置，尽量不把物体放 置在振型幅值较大的位置。<br /> 利用有限单元法来做模态分析的基本思路是，首先将连续体离散，化为有限数目的 单元结构，然后基于平衡条件和变形协调条件，将系统看作多自由度系统来求解。<br /> 本小节利用ANSYS有限元分析软件对卧式加工中心的立柱结构进行计算模态分 析，得出其前四阶模态的相关振型和固有频率。不考虑网格划分和单元类型的话，结构 的模态分析结果主要取决于两点，其一是结构本身的特性，其二是结构所受到的约束。 根据结果所受到的约束，可以将模态分析分为自由模态分析和约束模态分析两种。自由 模态分析即不施加任何约束使结构处于一种自由状态，分析结果的前六阶为6个刚体模态，包括由结构质量决定的3个平动模态和由转动惯量决定的3个转动模态。<br /> 材料属性定义与2.1.2小节中静力分析中的定义一样，为灰铸铁HT250。<br /> 2. 2.1自由模态分析<br /> 划分网格后，不添加任何约束，修改Analysis Setting中的Max Modes to find为12, 求解立柱的前12阶自由模态。相应的固有频率和振型描述如下表所示：<br /> 表2.2前6阶自由模态固有频率值和振型描述<br /> Tab.2.2 1st - 6th natural frequency and free mode description of colimm</p> <table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse;mso-table-layout-alt:fixed;mso-table-overlap: never;mso-padding-alt:0cm .5pt 0cm .5pt"> <tbody> <tr style="mso-yfti-irow:0;mso-yfti-firstrow:yes;height:34.1pt;mso-height-rule: exactly"> <td width="52" style="width: 39.35pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 34.1pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:11.0pt;text-align:center; text-indent:0cm;line-height:10.5pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">阶次</span></span><o:p></o:p></p> </td> <td width="96" style="width: 71.75pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 34.1pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 15.6pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:355.7pt;mso-element-frame-height:151.45pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">固有频率 </span><span class="2AngsanaUPC"><span lang="EN-US">(Hz)</span></span></span><o:p></o:p></p> </td> <td width="55" style="width: 41.05pt; border-style: solid none none solid; border-top-color: windowtext; border-top-width: 1pt; border-left-color: windowtext; border-left-width: 1pt; padding: 0cm 0.5pt; height: 34.1pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:8.0pt;text-align:center; text-indent:0cm;line-height:10.5pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">阶次</span></span><o:p></o:p></p> </td> <td width="75" style="width: 56.15pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 34.1pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 15.6pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:355.7pt;mso-element-frame-height:151.45pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">固有频率 </span><span class="2AngsanaUPC"><span lang="EN-US">(Hz)</span></span></span><o:p></o:p></p> </td> <td width="196" style="width: 147.35pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 34.1pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:355.7pt;mso-element-frame-height:151.45pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">振型描述</span></span><o:p></o:p></p> </td> </tr> <tr style="mso-yfti-irow:1;height:17.05pt;mso-height-rule:exactly"> <td width="52" style="width: 39.35pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 17.05pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-right:15.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">V</span></span></span><o:p></o:p></p> </td> <td width="96" style="width: 71.75pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 17.05pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:355.7pt;mso-element-frame-height:151.45pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">0</span></span></span><o:p></o:p></p> </td> <td width="55" style="width: 41.05pt; border-style: solid none none solid; border-top-color: windowtext; border-top-width: 1pt; border-left-color: windowtext; border-left-width: 1pt; padding: 0cm 0.5pt; height: 17.05pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:8.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">1(7</span></span><span class="2105pt"><span lang="EN-US">’）</span></span></span><o:p></o:p></p> </td> <td width="75" style="width: 56.15pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 17.05pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:14.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">135.11</span></span></span><o:p></o:p></p> </td> <td width="196" style="width: 147.35pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 17.05pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:355.7pt;mso-element-frame-height:151.45pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">立柱两支撑面反向振动</span></span><o:p></o:p></p> </td> </tr> <tr style="mso-yfti-irow:2;height:19.45pt;mso-height-rule:exactly"> <td width="52" style="width: 39.35pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-right:15.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">2</span></span><span class="2105pt">，</span></span><o:p></o:p></p> </td> <td width="96" style="width: 71.75pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:355.7pt;mso-element-frame-height:151.45pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">0</span></span></span><o:p></o:p></p> </td> <td width="55" style="width: 41.05pt; border-style: none none none solid; border-left-color: windowtext; border-left-width: 1pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:8.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">2(8</span></span><span class="2105pt"><span lang="EN-US">’）</span></span></span><o:p></o:p></p> </td> <td width="75" style="width: 56.15pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:14.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">142.37</span></span></span><o:p></o:p></p> </td> <td width="196" style="width: 147.35pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:10.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">立柱沿以</span><span class="2AngsanaUPC"><span lang="EN-US">Y</span></span><span class="2105pt">向为轴的扭动</span></span><o:p></o:p></p> </td> </tr> <tr style="mso-yfti-irow:3;height:19.45pt;mso-height-rule:exactly"> <td width="52" style="width: 39.35pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-right:15.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">3</span></span><span class="2105pt">，</span></span><o:p></o:p></p> </td> <td width="96" style="width: 71.75pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:355.7pt;mso-element-frame-height:151.45pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">0</span></span></span><o:p></o:p></p> </td> <td width="55" style="width: 41.05pt; border-style: none none none solid; border-left-color: windowtext; border-left-width: 1pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:8.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">3(9</span></span><span class="2105pt"><span lang="EN-US">，）</span></span></span><o:p></o:p></p> </td> <td width="75" style="width: 56.15pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:14.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">162.35</span></span></span><o:p></o:p></p> </td> <td width="196" style="width: 147.35pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:10.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">两支撑面在</span><span class="2AngsanaUPC"><span lang="EN-US">Y</span></span><span class="2105pt">向上下振动</span></span><o:p></o:p></p> </td> </tr> <tr style="mso-yfti-irow:4;height:19.45pt;mso-height-rule:exactly"> <td width="52" style="width: 39.35pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:355.7pt;mso-element-frame-height:151.45pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">4</span></span><span class="2105pt">，</span></span><o:p></o:p></p> </td> <td width="96" style="width: 71.75pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:9.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">4.6636e-004</span></span></span><o:p></o:p></p> </td> <td width="55" style="width: 41.05pt; border-style: none none none solid; border-left-color: windowtext; border-left-width: 1pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:8.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">4(10</span></span><span class="2105pt"><span lang="EN-US">，）</span></span></span><o:p></o:p></p> </td> <td width="75" style="width: 56.15pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:14.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">228.44</span></span></span><o:p></o:p></p> </td> <td width="196" style="width: 147.35pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:355.7pt;mso-element-frame-height:151.45pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">以支撑面中线为轴振动</span></span><o:p></o:p></p> </td> </tr> <tr style="mso-yfti-irow:5;height:19.45pt;mso-height-rule:exactly"> <td width="52" style="width: 39.35pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-right:15.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">5,</span></span></span><o:p></o:p></p> </td> <td width="96" style="width: 71.75pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:9.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">9.6344e-004</span></span></span><o:p></o:p></p> </td> <td width="55" style="width: 41.05pt; border-style: none none none solid; border-left-color: windowtext; border-left-width: 1pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:8.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">5(11</span></span><span class="2105pt"><span lang="EN-US">，）</span></span></span><o:p></o:p></p> </td> <td width="75" style="width: 56.15pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:14.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">237.30</span></span></span><o:p></o:p></p> </td> <td width="196" style="width: 147.35pt; padding: 0cm 0.5pt; height: 19.45pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:10.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">支撑面以</span><span class="2AngsanaUPC"><span lang="EN-US">Y</span></span><span class="2105pt">向中线为轴振动</span></span><o:p></o:p></p> </td> </tr> <tr style="mso-yfti-irow:6;mso-yfti-lastrow:yes;height:22.55pt;mso-height-rule: exactly"> <td width="52" style="width: 39.35pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm 0.5pt; height: 22.55pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-right:15.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">6</span></span><span class="2105pt">，</span></span><o:p></o:p></p> </td> <td width="96" style="width: 71.75pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm 0.5pt; height: 22.55pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:9.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">1.3707e-003</span></span></span><o:p></o:p></p> </td> <td width="55" style="width: 41.05pt; border-style: none none solid solid; border-left-color: windowtext; border-left-width: 1pt; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm 0.5pt; height: 22.55pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:8.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">6(12</span></span><span class="2105pt"><span lang="EN-US">，）</span></span></span><o:p></o:p></p> </td> <td width="75" style="width: 56.15pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm 0.5pt; height: 22.55pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:14.0pt;text-align:center; text-indent:0cm;line-height:16.0pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:355.7pt;mso-element-frame-height: 151.45pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">248.74</span></span></span><o:p></o:p></p> </td> <td width="196" style="width: 147.35pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm 0.5pt; height: 22.55pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:355.7pt;mso-element-frame-height:151.45pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:130.35pt;mso-element-top:277.65pt"><span style="font-size: x-small;"><span class="2105pt">两支撑面做开合式振动</span></span><o:p></o:p></p> </td> </tr> </tbody> </table> <p>自由模态的前三阶固有频率为零，第4’、5’和6’阶固有频率接近零，这是由于计算 误差造成的，故前六阶模态固有频率均可看作为零，其振动是由于水平方向或者垂直方 向的力导致的且主要在低频段。鉴于前六阶模态的固有频率为零，将实际的第七阶模态 (弹性体模态的初始模态）看作第1阶模态并以此向下对应之。第1阶模态到第4模态 的振型云图如下如所示：<br /> <br /> 2. 2. 2约束模态分析<br /> 约束模态分析即是考虑在加工中心的实际工作情况中立柱的边界条件，因为对于一 个系统来说，若与之连接的系统发生改变那么其自身的动态特性也会收到影响而改变 [5Q]。边界条件的设定会对结构的固有频率和模态振型产生较大影响，这可以通过对比自 由模态和约束模态分析的结果看出。<br /> 约束位置首先是位于立柱下底面上的滑块接合面上，约束形式为除X向滑动外的固 定约束，其次是下底面上的滚珠丝杠接合面，约束形式为固定约束。<br /> <br /> 前四阶模态的具体的固有频率和其相应的振型描述如下表所示：<br /> 表2.3前4阶约束模态固有频率值和振型描述<br /> Tab.2.3 1st - 4th natural frequency and constraint mode description of column</p> <table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse;mso-table-layout-alt:fixed;mso-table-overlap: never;mso-padding-alt:0cm .5pt 0cm .5pt"> <tbody> <tr style="mso-yfti-irow:0;mso-yfti-firstrow:yes;height:18.5pt;mso-height-rule: exactly"> <td width="70" style="width: 52.8pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 18.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="margin-left:13.0pt;text-align:center; text-indent:0cm;line-height:10.5pt;mso-line-height-rule:exactly;background: transparent;mso-element:frame;mso-element-frame-width:283.45pt;mso-element-frame-height: 90.0pt;mso-element-wrap:none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2105pt">阶次</span></span><o:p></o:p></p> </td> <td width="109" style="width: 82.1pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 18.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2105pt">频率</span><span class="2AngsanaUPC"><span lang="EN-US">(Hz)</span></span></span><o:p></o:p></p> </td> <td width="198" style="width: 148.55pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 18.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2105pt">振型描述</span></span><o:p></o:p></p> </td> </tr> <tr style="mso-yfti-irow:1;height:16.1pt;mso-height-rule:exactly"> <td width="70" style="width: 52.8pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 16.1pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">1</span></span></span><o:p></o:p></p> </td> <td width="109" style="width: 82.1pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 16.1pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">60.648</span></span></span><o:p></o:p></p> </td> <td width="198" style="width: 148.55pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm 0.5pt; height: 16.1pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2105pt">立柱沿</span><span class="2AngsanaUPC"><span lang="EN-US">Y</span></span><span class="2105pt">方向摆动</span></span><o:p></o:p></p> </td> </tr> <tr style="mso-yfti-irow:2;height:17.5pt;mso-height-rule:exactly"> <td width="70" style="width: 52.8pt; padding: 0cm 0.5pt; height: 17.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">2</span></span></span><o:p></o:p></p> </td> <td width="109" style="width: 82.1pt; padding: 0cm 0.5pt; height: 17.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">129.51</span></span></span><o:p></o:p></p> </td> <td width="198" style="width: 148.55pt; padding: 0cm 0.5pt; height: 17.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2105pt">立柱向</span><span class="2AngsanaUPC"><span lang="EN-US">X</span></span><span class="2105pt">正方向摆动</span></span><o:p></o:p></p> </td> </tr> <tr style="mso-yfti-irow:3;height:17.75pt;mso-height-rule:exactly"> <td width="70" style="width: 52.8pt; padding: 0cm 0.5pt; height: 17.75pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">3</span></span></span><o:p></o:p></p> </td> <td width="109" style="width: 82.1pt; padding: 0cm 0.5pt; height: 17.75pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">170.62</span></span></span><o:p></o:p></p> </td> <td width="198" style="width: 148.55pt; padding: 0cm 0.5pt; height: 17.75pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2105pt">立柱绕</span><span class="2AngsanaUPC"><span lang="EN-US">Z</span></span><span class="2105pt">方向扭动</span></span><o:p></o:p></p> </td> </tr> <tr style="mso-yfti-irow:4;mso-yfti-lastrow:yes;height:20.15pt;mso-height-rule: exactly"> <td width="70" style="width: 52.8pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm 0.5pt; height: 20.15pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">4</span></span></span><o:p></o:p></p> </td> <td width="109" style="width: 82.1pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm 0.5pt; height: 20.15pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 16.0pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2AngsanaUPC"><span lang="EN-US">184.47</span></span></span><o:p></o:p></p> </td> <td width="198" style="width: 148.55pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm 0.5pt; height: 20.15pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="20" align="center" style="text-align:center;text-indent:0cm;line-height: 10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:frame; mso-element-frame-width:283.45pt;mso-element-frame-height:90.0pt;mso-element-wrap: none;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:page; mso-element-left:166.45pt;mso-element-top:417.1pt"><span style="font-size: x-small;"><span class="2105pt">立柱两支撑面反向振动</span></span><o:p></o:p></p> </td> </tr> </tbody> </table></div> <div class="blank30"></div> <!-- tag --> <div class="blank10"></div> 标签： <a href='/index.php?case=tag&act=show&tag=%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>加工中心</a> <!-- 分类 --> <div class="blank10"></div> 分类： <a href='/bethel/type/jnc/type-1.html' target='_blank'>加工中心</a> <div class="blank30"></div> <!--自动调用自定义字段--> <div class="blank20"></div> <div class="blank30"></div> <!-- 投票 --> <script src="/index.php?case=vote&act=view&aid=1371"></script> <!-- 自定义表单开始 --> <!-- 自定义表单结束 --> <div class="blank60"></div> <!-- 上下页开始 --> <div id="page"> <strong>上一篇</strong><a href="/bethel/news/show_1370.html">加工中心立柱的静力分析</a> <div class="blank10"></div> <strong>下一篇</strong><a 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.btn-qq{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_qq.png) 0px 0px no-repeat; background-color:#6da9de;color:#FFF;} .izl-rmenu .btn-qq:hover{background-color:#488bc7;color:#FFF;} .izl-rmenu .btn-qq .qq{background-color:#488bc7; position:absolute; width:160px; left:-160px; top:0px; line-height:73px; color:#FFF; font-size:18px; text-align:center; display:none;} .izl-rmenu .btn-qq a {color:#FFF;font-size:14px;} .izl-rmenu .btn-wx{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_wx.png) 0px 0px no-repeat; background-color:#78c340;} .izl-rmenu .btn-wx:hover{background-color:#58a81c;} .izl-rmenu .btn-wx .pic{position:absolute; left:-160px; top:0px; display:none;width:140px;height:140px; max-width: 200%;} .izl-rmenu .btn-phone{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_phone.png) 0px 0px no-repeat; background-color:#fbb01f;} .izl-rmenu .btn-phone:hover{background-color:#ff811b;} .izl-rmenu .btn-phone .phone{background-color:#ff811b; position:absolute; width:160px; left:-160px; top:0px; line-height:73px; color:#FFF; font-size:18px; text-align:center; display:none;} .izl-rmenu .btn-ali{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_ali.png) 0px 0px no-repeat; background-color:#B8860B;} .izl-rmenu .btn-ali:hover{background-color:#808000;} .izl-rmenu a.btn-ali,.izl-rmenu a.btn-ali:visited{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_ali.png) 0px 0px no-repeat; background-color:#B8860B; text-decoration:none; display:block;} .izl-rmenu .btn-wangwang{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_wangwang.png) 0px 0px no-repeat; background-color:#FFD700;} .izl-rmenu .btn-wangwang:hover{background-color:#DAA520;} .izl-rmenu a.btn-wangwang,.izl-rmenu a.btn-wangwang:visited{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_wangwang.png) 0px 0px no-repeat; background-color:#FFD700; text-decoration:none; display:block;} .izl-rmenu .btn-skype{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_skype.png) 0px 0px no-repeat; background-color:#FF69B4;} .izl-rmenu .btn-skype:hover{background-color:#8B008B;} .izl-rmenu a.btn-skype,.izl-rmenu a.btn-skype:visited{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_skype.png) 0px 0px no-repeat; background-color:#FF69B4; text-decoration:none; display:block;} .izl-rmenu .btn-web{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_web.png) 0px 0px no-repeat; background-color:#008a46;} .izl-rmenu .btn-web:hover{background-color:#00663a;} .izl-rmenu a.btn-web,.izl-rmenu a.btn-web:visited{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_web.png) 0px 0px no-repeat; background-color:#008a46; text-decoration:none; display:block;} .izl-rmenu .btn-top{background:url(/template/CmsEasy_V_408/skin/images/servers/metro_color/r_top.png) 0px 0px 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