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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>加工中心谐响应分析及两方面结果综合分析<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> <span style="line-height: 20.65pt; text-indent: 26pt; background-color: transparent;">模态分析反映了机床的物理属性，而要想知道机床在实际工作时的响应情况，则需 进行谐响应分析。</span></p> <div class="Section1"> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-indent:26.0pt; line-height:20.65pt;mso-line-height-rule:exactly;background:transparent"><span class="2">机床在实际工作时，连接在主轴上的刀具相当于激励输入点，该激励响应作用在由 夹具固定在工作台上的工件上，所以分析时在机床主轴前端施加一对副值大小为</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">1000</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">N </span></span><span class="2">的简谐力（相当于转矩），提取工作台上一点为响应输出点，分析机床</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">250</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span class="2">内的谐响</span><!--[if gte vml 1]><o:wrapblock><v:shapetype id="_x0000_t202" coordsize="21600,21600" o:spt="202" path="m,l,21600r21600,l21600,xe"> <v:stroke joinstyle="miter" /> <v:path gradientshapeok="t" o:connecttype="rect" /> </v:shapetype><v:shape 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mso-wrap-distance-right:5pt;mso-wrap-distance-bottom:94.55pt; mso-position-horizontal-relative:margin;mso-position-vertical-relative:text' filled="f" stroked="f"> <v:textbox style='mso-fit-shape-to-text:t' inset="0,0,0,0"> <![if !mso]> <table cellpadding=0 cellspacing=0 width="100%"> <tr> <td><![endif]> <div> <p class=20 style='line-height:7.0pt;mso-line-height-rule:exactly; background:transparent'><span lang=EN-US><o:p> </o:p></span></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> <w:wrap type="topAndBottom" anchorx="margin" /> </v:shape><![endif]--><!--[if !vml]--><span class="2">应特性，分析步长选择1000,阻尼比设置为0.05,利用模态叠加法</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Mode</span></span><span class="2"><span lang="EN-US" style="font-size: 9pt; font-family: SimSun;"> </span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Superposition</span></span><span class="2">计 算</span><span class="2"><span lang="EN-US" style="font-size:9.0pt;mso-hansi-font-family:"Times New Roman"; mso-ansi-language:EN-US"><o:p></o:p></span></span><span style="font-size:9.0pt"> </span></p> <p class="60" style="margin-top:0cm;margin-right:0cm;margin-bottom:10.2pt; margin-left:0cm;line-height:14.0pt;mso-line-height-rule:exactly;mso-pagination: lines-together;page-break-after:avoid;background:transparent"><a name="bookmark7"><span class="6"><span style="font-size: 9pt; font-family: SimSun;">2.4</span></span></a><span class="6">两方面结果综合分析</span><span style="font-size:9.0pt"><o:p></o:p></span></p> <p class="130" align="left" style="margin: 0cm 0cm 0.0001pt 24pt; line-height: 20.4pt; background: transparent;"><span class="130pt">综合以丨:两方1⑴的分析结災，||丨得;丨丨以</span><span class="1312pt2"><span lang="EN-US" style="font-size: 9pt;">K</span></span><span class="13"><span lang="EN-US" style="font-size: 9pt; font-family: SimSun;"> </span></span><span class="13"><span style="font-size: 9pt; font-family: 'Times New Roman';">•</span></span><span class="13">些从木结论：</span><span style="font-size:9.0pt"><o:p></o:p></span></p> <p class="21" align="right" style="margin-top:0cm;margin-right:9.0pt;margin-bottom: 0cm;margin-left:0cm;margin-bottom:.0001pt;text-align:right;line-height:20.4pt; mso-line-height-rule:exactly;background:transparent"><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">C</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">1)</span></span><span class="2">山丨</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">t</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 </span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">U</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span class="2">、</span><span class="2">阁 </span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">h</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span class="2">和阳 </span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 </span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">U</span></span><span class="23pt"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span class="23pt">叫7]</span><span class="23pt"><span style="font-size: 9pt; font-family: 'Times New Roman';">•</span></span><span class="23pt">山，彳频特线/|;5(川 </span><span class="2">附近均介较火</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">l</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">'</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">l</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">%</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">V</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">;</span></span><span class="2">值，尤</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">U</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">:</span></span><span class="2">见</span><span class="2TimesNewRoman">X</span><span class="2">以和</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">ZI</span></span><span class="2-1pt">(彳，对</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">hV</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">:.</span></span><span class="2">幣机笫4阶枚态，</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">U</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">:</span></span><span class="2">频半为</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">47.9</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">llz</span></span><span class="2">，</span><span style="font-size:9.0pt"><br clear="all" style="mso-special-character:line-break; page-break-before:always" /> <o:p></o:p></span></p> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 9pt; line-height: 20.65pt; background: transparent;"><span class="2">振型为立柱三个方向上的复合振动，其屮</span><span class="2TimesNewRoman">X</span><span class="2">向和</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span class="2">向的振幅较大。</span><span style="font-size:9.0pt"><o:p></o:p></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:9.0pt;margin-bottom:.0001pt;text-indent:29.0pt;line-height:20.65pt; mso-line-height-rule:exactly;mso-list:l0 level1 lfo1;tab-stops:63.7pt; background:transparent"><!--[if !supportLists]--><span style="font-size: 12pt; font-family: SimSun;">(2)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">由图</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">a</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span class="2">和图</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">c</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span class="2">可看出，</span><span class="2TimesNewRoman">X</span><span class="2">向和</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span class="2">向的幅频特性曲线</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">75</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span class="2">附近时 有较大的幅值，对应整机第5阶模态，其频率为</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">75.9</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span class="2">，</span><span class="2">振型为立柱两侧沿</span><span class="2TimesNewRoman">X</span><span class="2">向异向 振动，主轴箱立滑板沿</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span class="2">向振动。</span><span style="font-size:9.0pt"><o:p></o:p></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:9.0pt;margin-bottom:.0001pt;text-indent:29.0pt;line-height:20.65pt; mso-line-height-rule:exactly;mso-list:l0 level1 lfo1;tab-stops:63.7pt; background:transparent"><!--[if !supportLists]--><span style="font-size: 12pt; font-family: SimSun;">(3)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">由图</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">b</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span class="2">和图</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">c</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span class="2">可看出，</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Y</span></span><span class="2">向和</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span class="2">向的幅频特性曲线在</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">150</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span class="2">附 近时有较大的幅值，尤其是</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span class="2">向，对应整机第9阶模态，其频率为</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">156.8</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span class="2">，</span><span class="2">振型为立 柱，主轴箱及立滑板中部沿</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span class="2">向扭振，同时存在一定的上下振动。</span><span style="font-size: 9.0pt"><o:p></o:p></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:9.0pt;margin-bottom:.0001pt;text-indent:29.0pt;line-height:20.65pt; mso-line-height-rule:exactly;mso-list:l0 level1 lfo1;background:transparent"><!--[if !supportLists]--><span style="font-size: 12pt; font-family: SimSun;">(4)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2"><span style="font-size: 9pt; font-family: SimSun;"> </span></span><span class="2">山图</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">b</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span class="2">和图</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">c</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span class="2">可看出，</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Y</span></span><span class="2">向和</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span class="2">向的幅频特性曲线在180</span><span class="2"><span style="font-size: 9pt; font-family: PMingLiU;">?</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">190</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz </span></span><span class="2">范围内时有较大的幅值，对应整机第12阶模态，其频率为</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">187.6</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span class="2">，</span><span class="2">振型为主轴箱沿中 间面扭振，其中在</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span class="2">方向上的振动较为明显。</span><span style="font-size:9.0pt"><o:p></o:p></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:9.0pt;margin-bottom:.0001pt;text-indent:29.0pt;line-height:20.65pt; mso-line-height-rule:exactly;mso-list:l0 level1 lfo1;tab-stops:63.7pt; background:transparent"><!--[if !supportLists]--><span style="font-size: 12pt; font-family: SimSun;">(5)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">由图</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">c</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span class="2">可看出，</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span class="2">方向的幅频特性曲线在</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">210</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span class="2">附近有较大的幅值，对 应整机第13阶模态，其频率为</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">207.8</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span class="2">，</span><span class="2">振型为立滑板及工作台的前后摆动。整机第 13阶模态振型如图</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">2.7</span></span><span class="2">所示。</span><span style="font-size:9.0pt"><o:p></o:p></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:9.0pt;margin-bottom:.0001pt;text-indent:23.0pt;line-height:20.65pt; mso-line-height-rule:exactly;mso-list:l0 level1 lfo1;tab-stops:63.7pt; background:transparent"><!--[if !supportLists]--><span style="font-size: 12pt; font-family: SimSun;">(6)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">由上可知，机床在屮低转速时立柱的振动较为明显，由此推断立柱与床身结合面特 性参数对其有一定影响。立柱床身之间采用12个</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">M</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">24</span></span><span class="2">的螺栓连接，现将其有限元模型 中该部分的结合面特性参数改为用</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">M</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">28</span></span><span class="2">的螺栓连接计算所得数据，再次进行整机模态 分析，提取前20阶模态，其中前两阶为丝杠自身膨胀，第3~20阶频率如表</span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">2.6</span></span><span class="2">所示。</span><span style="font-size:9.0pt"><o:p></o:p></span></p> <div> <table cellspacing="0" cellpadding="0" hspace="0" vspace="0" width="650" align="center"> <tbody> <tr> <td valign="top" align="left" style="padding-top:0cm;padding-right:0cm; padding-bottom:0cm;padding-left:0cm"> <p class="a2" style="line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="a1">表</span><span class="a1"><span style="font-size: 9pt; font-family: SimSun;">2.6</span></span><span class="a1">修改参数后整机前20阶闹冇频率（单位：</span><span class="SegoeUI"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span class="a1"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> <div align="center"> <table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse;mso-table-layout-alt:fixed;mso-padding-alt: 0cm 0cm 0cm 0cm"> <tbody> <tr style="mso-yfti-irow:0;mso-yfti-firstrow:yes;height:24.95pt;mso-height-rule: exactly"> <td width="68" style="width: 50.9pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 24.95pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 17pt; line-height: 10pt; background: transparent;"><span class="210pt">阶次</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="63" style="width: 47.5pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 24.95pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">3</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 24.95pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">4</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 24.95pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">5</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="64" valign="bottom" style="width: 48.25pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 24.95pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">6</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 24.95pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">7</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="64" valign="bottom" style="width: 48pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 24.95pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">8</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="66" style="width: 49.2pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 24.95pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">9</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" valign="bottom" style="width: 48.5pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 24.95pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">10</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="66" valign="bottom" style="width: 49.45pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 24.95pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">11</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> </tr> <tr style="mso-yfti-irow:1;height:18.25pt;mso-height-rule:exactly"> <td width="68" style="width: 50.9pt; padding: 0cm; height: 18.25pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 17pt; line-height: 10pt; background: transparent;"><span class="210pt">频率</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="63" style="width: 47.5pt; padding: 0cm; height: 18.25pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">45.5</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; padding: 0cm; height: 18.25pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">52.1</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; padding: 0cm; height: 18.25pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">86.8</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="64" style="width: 48.25pt; padding: 0cm; height: 18.25pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">115.4</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; padding: 0cm; height: 18.25pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">122.2</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="64" style="width: 48pt; padding: 0cm; height: 18.25pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">155.4</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="66" style="width: 49.2pt; padding: 0cm; height: 18.25pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">175.4</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.5pt; padding: 0cm; height: 18.25pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">187.3</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="66" style="width: 49.45pt; padding: 0cm; height: 18.25pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">201.1</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> </tr> <tr style="mso-yfti-irow:2;height:23.5pt;mso-height-rule:exactly"> <td width="68" style="width: 50.9pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 23.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 17pt; line-height: 10pt; background: transparent;"><span class="210pt">阶次</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="63" valign="bottom" style="width: 47.5pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 23.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">12</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 23.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">13</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 23.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">14</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="64" style="width: 48.25pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 23.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">15</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" valign="bottom" style="width: 48.7pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 23.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">16</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="64" style="width: 48pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 23.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">17</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="66" valign="bottom" style="width: 49.2pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 23.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">18</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.5pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 23.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">19</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="66" valign="bottom" style="width: 49.45pt; border-style: solid none none; border-top-color: windowtext; border-top-width: 1pt; padding: 0cm; height: 23.5pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="center" style="margin:0cm;margin-bottom:.0001pt; text-align:center;line-height:10.0pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-width:487.9pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt;mso-height-rule:exactly"><span class="210pt">20</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> </tr> <tr style="mso-yfti-irow:3;mso-yfti-lastrow:yes;height:19.9pt;mso-height-rule: exactly"> <td width="68" style="width: 50.9pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm; height: 19.9pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 17pt; line-height: 10pt; background: transparent;"><span class="210pt">频率</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="63" style="width: 47.5pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm; height: 19.9pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 14pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">2</span></span><span class="2SegoeUI"><span lang="EN-US" style="font-size: 9pt;">0</span></span><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">.3</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm; height: 19.9pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 14pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">225.8</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm; height: 19.9pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 14pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">237.9</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="64" style="width: 48.25pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm; height: 19.9pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">251.4</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.7pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm; height: 19.9pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">254.8</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="64" style="width: 48pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm; height: 19.9pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">267.1</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="66" style="width: 49.2pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm; height: 19.9pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">281.4</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="65" style="width: 48.5pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm; height: 19.9pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">289.9</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> <td width="66" style="width: 49.45pt; border-style: none none solid; border-bottom-color: windowtext; border-bottom-width: 1pt; padding: 0cm; height: 19.9pt; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt 13pt; line-height: 10pt; background: transparent;"><span class="210pt"><span style="font-size: 9pt; font-family: SimSun;">301.1</span></span><span style="font-size:9.0pt"><o:p></o:p></span></p> </td> </tr> </tbody> </table> </div> </td> </tr> </tbody> </table> </div> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt; line-height: 20.65pt; background: transparent;"><span class="2"><span style="line-height: 16px;">对比表可以看出，修改床身立柱结合面参数后的整机固有频率有所提高，且高阶频</span>率提高的幅度比低阶大，证明了该推断是正确的。</span><span style="font-size:9.0pt"><o:p></o:p></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:14.3pt; margin-left:0cm;text-indent:24.0pt;line-height:20.65pt;mso-line-height-rule: exactly;background:transparent"><span class="2">中低阶时立柱的振动较为明显，由此也带动了立滑板和主轴箱的振动，第8阶为工 作台的振动，高阶则主要是立滑板和主轴箱的振动。高阶振型对应的刚度和阻尼值都较 大，而该机床的转速属于中低速范围实际情况中不会出现这样的情况，在研究整机动态 特性时不关心高阶频率和振型。之后的章节将对立柱和</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span class="2">向进给系统进行进-</span><span class="2"><span style="font-size: 9pt; font-family: 'Times New Roman';">•</span></span><span class="2">步的分析 和优化。</span><span style="font-size:9.0pt"><o:p></o:p></span></p> <p class="640" align="left" style="margin: 0cm 0cm 12.25pt; line-height: 14pt; page-break-after: avoid; background: transparent;"><a name="bookmark8"><span class="64"><span style="font-size: 9pt; font-family: SimSun;">2.5</span></span></a><span class="64">本章小结</span><span style="font-size:9.0pt"><o:p></o:p></span></p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-indent:24.0pt; line-height:20.65pt;mso-line-height-rule:exactly;background:transparent"><span class="2">本章首先对</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">SGM</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">50</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">A</span></span><span class="2">卧式加工中心的整体结构及特点进行了简单的介绍，建立了适 合有限元网格划分的三维</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">CAD</span></span><span class="2">模型，接着阐述了一种固定结合面和两种滚动结合面在 有限元中的模拟方法，在</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">HyperMesh</span></span><span class="2">中划分了网格并设置了单元类型和材料属性，采用 </span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">ANSYS</span></span><span class="2">中的用户自定义单元</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">MARTIX</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">27</span></span><span class="2">来模拟零件之间接触面的动力学特性，在此基 础上建立了 </span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">SGM</span></span><span class="2"><span style="font-size: 9pt; font-family: SimSun;">50</span></span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">A</span></span><span class="2">整机有限元模型；然后参照固定结合面模拟边界条件，将结合面 特性数据代入整机有限元模型中进行计算，得到了各阶模态的频率和振型；再以主轴前 端为施力点工作台上一点为输出点，提取了主轴与工作台之间三个方向的相对位移幅频 曲线；最后联系两方面的分析结果得出床身和立柱之间的结合面对整机动态性能影响较 大，并指出机床的薄弱部件，为之后的优化指明方向。</span><span style="font-size:9.0pt"><o:p></o:p></span></p> </div> <p><span style="font-size:9.0pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";mso-ansi-language:#0400;mso-fareast-language: #0400;mso-bidi-language:AR-SA"><br clear="all" style="page-break-before:always; mso-break-type:section-break" /> </span></p> <p> </p> <p> </p> <p class="MsoNormal"><span style="font-size:9.0pt;font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">本文采摘自“</span><span lang="EN-US" style="font-size:9.0pt">SGM50A</span><span style="font-size:9.0pt; font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">卧式加工中心动态特性分析及关键部件的优化”，因为编辑困难导致有些函数、表格、图片、内容无法显示，有需要者可以在网络中查找相关文章！本文由伯特利数控整理发表文章均来自网络仅供学习参考，转载请注明！</span><span lang="EN-US" style="font-size:9.0pt"> <o:p></o:p></span></p></div> <div class="blank30"></div> <!-- tag --> <div class="blank10"></div> 标签： <a href='/index.php?case=tag&act=show&tag=%E5%8D%A7%E5%BC%8F%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>卧式加工中心</a> <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> <a 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