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<li><a title="數(shù)控文章" href="/bethel/news">數(shù)控文章</a></li> </ol> </nav> </div> <!--/sub_menu--><!-- 面包屑導(dǎo)航結(jié)束 --> <!-- 頁面標(biāo)題開始 --> <div id="n1l1njb9b" class="title"> <h3><a>加工中心諧響應(yīng)分析及兩方面結(jié)果綜合分析<small></small></a></h3> </div> <!-- 頁面標(biāo)題結(jié)束 --> <hr class="featurette-divider"> <!-- 中部開始 --> <div id="n1l1njb9b" class="container"> <!-- 正文 --> <div id="n1l1njb9b" class="lead" id="print"> <p> <span style="line-height: 20.65pt; text-indent: 26pt; background-color: transparent;">模態(tài)分析反映了機(jī)床的物理屬性，而要想知道機(jī)床在實(shí)際工作時(shí)的響應(yīng)情況，則需 進(jìn)行諧響應(yīng)分析。</span></p> <div id="n1l1njb9b" 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 id="n1l1njb9b" class="2">機(jī)床在實(shí)際工作時(shí)，連接在主軸上的刀具相當(dāng)于激勵(lì)輸入點(diǎn)，該激勵(lì)響應(yīng)作用在由 夾具固定在工作臺上的工件上，所以分析時(shí)在機(jī)床主軸前端施加一對副值大小為</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">1000</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">N </span></span><span id="n1l1njb9b" class="2">的簡諧力（相當(dāng)于轉(zhuǎn)矩），提取工作臺上一點(diǎn)為響應(yīng)輸出點(diǎn)，分析機(jī)床</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">250</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span id="n1l1njb9b" class="2">內(nèi)的諧響</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 id="_x0000_s1027" type="#_x0000_t202" style='position:absolute; left:0;text-align:left;margin-left:391.2pt;margin-top:39.35pt;width:21.1pt; height:9pt;text-indent:0;z-index:-9;mso-wrap-distance-left:5pt; 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cellpadding=0 cellspacing=0 width="100%"> <tr> <td><![endif]> <div> <p class=17 style='margin-bottom:0cm;margin-bottom:.0001pt;line-height: 5.5pt;mso-line-height-rule:exactly;background:transparent'><span lang=EN-US style='mso-fareast-font-family:宋體;mso-fareast-language:ZH-CN'><o:p> </o:p></span></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> <w:wrap type="topAndBottom" anchorx="margin" /> </v:shape><v:shape id="_x0000_s1031" type="#_x0000_t202" style='position:absolute; left:0;text-align:left;margin-left:82.55pt;margin-top:163.2pt;width:48.5pt; height:6.75pt;text-indent:0;z-index:-5;mso-wrap-distance-left:78.7pt; 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 id="n1l1njb9b" class="2">應(yīng)特性，分析步長選擇1000,阻尼比設(shè)置為0.05,利用模態(tài)疊加法</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Mode</span></span><span id="n1l1njb9b" class="2"><span lang="EN-US" style="font-size: 9pt; font-family: SimSun;"> </span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Superposition</span></span><span id="n1l1njb9b" class="2">計(jì) 算</span><span id="n1l1njb9b" 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 id="n1l1njb9b" class="6"><span style="font-size: 9pt; font-family: SimSun;">2.4</span></span></a><span id="n1l1njb9b" class="6">兩方面結(jié)果綜合分析</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 id="n1l1njb9b" class="130pt">綜合以丨:兩方1⑴的分析結(jié)災(zāi)，||丨得;丨丨以</span><span id="n1l1njb9b" class="1312pt2"><span lang="EN-US" style="font-size: 9pt;">K</span></span><span id="n1l1njb9b" class="13"><span lang="EN-US" style="font-size: 9pt; font-family: SimSun;"> </span></span><span id="n1l1njb9b" class="13"><span style="font-size: 9pt; font-family: 'Times New Roman';">•</span></span><span id="n1l1njb9b" class="13">些從木結(jié)論：</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 id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">C</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">1)</span></span><span id="n1l1njb9b" class="2">山丨</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">t</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 </span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">U</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span id="n1l1njb9b" class="2">、</span><span id="n1l1njb9b" class="2">閣 </span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">h</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span id="n1l1njb9b" class="2">和陽 </span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 </span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">U</span></span><span id="n1l1njb9b" class="23pt"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span id="n1l1njb9b" class="23pt">叫7]</span><span id="n1l1njb9b" class="23pt"><span style="font-size: 9pt; font-family: 'Times New Roman';">•</span></span><span id="n1l1njb9b" class="23pt">山，彳頻特線/|;5(川 </span><span id="n1l1njb9b" class="2">附近均介較火</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">l</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">'</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">l</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">%</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">V</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">;</span></span><span id="n1l1njb9b" class="2">值，尤</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">U</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">:</span></span><span id="n1l1njb9b" class="2">見</span><span id="n1l1njb9b" class="2TimesNewRoman">X</span><span id="n1l1njb9b" class="2">以和</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">ZI</span></span><span id="n1l1njb9b" class="2-1pt">(彳，對</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">hV</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">:.</span></span><span id="n1l1njb9b" class="2">幣機(jī)笫4階枚態(tài)，</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">U</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">:</span></span><span id="n1l1njb9b" class="2">頻半為</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">47.9</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">llz</span></span><span id="n1l1njb9b" 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 id="n1l1njb9b" class="2">振型為立柱三個(gè)方向上的復(fù)合振動，其屮</span><span id="n1l1njb9b" class="2TimesNewRoman">X</span><span id="n1l1njb9b" class="2">向和</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span id="n1l1njb9b" class="2">向的振幅較大。</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 id="n1l1njb9b" class="2">由圖</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">a</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span id="n1l1njb9b" class="2">和圖</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">c</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span id="n1l1njb9b" class="2">可看出，</span><span id="n1l1njb9b" class="2TimesNewRoman">X</span><span id="n1l1njb9b" class="2">向和</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span id="n1l1njb9b" class="2">向的幅頻特性曲線</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">75</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span id="n1l1njb9b" class="2">附近時(shí) 有較大的幅值，對應(yīng)整機(jī)第5階模態(tài)，其頻率為</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">75.9</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span id="n1l1njb9b" class="2">，</span><span id="n1l1njb9b" class="2">振型為立柱兩側(cè)沿</span><span id="n1l1njb9b" class="2TimesNewRoman">X</span><span id="n1l1njb9b" class="2">向異向 振動，主軸箱立滑板沿</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span id="n1l1njb9b" class="2">向振動。</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 id="n1l1njb9b" class="2">由圖</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">b</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span id="n1l1njb9b" class="2">和圖</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">c</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span id="n1l1njb9b" class="2">可看出，</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Y</span></span><span id="n1l1njb9b" class="2">向和</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span id="n1l1njb9b" class="2">向的幅頻特性曲線在</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">150</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span id="n1l1njb9b" class="2">附 近時(shí)有較大的幅值，尤其是</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span id="n1l1njb9b" class="2">向，對應(yīng)整機(jī)第9階模態(tài)，其頻率為</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">156.8</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span id="n1l1njb9b" class="2">，</span><span id="n1l1njb9b" class="2">振型為立 柱，主軸箱及立滑板中部沿</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span id="n1l1njb9b" class="2">向扭振，同時(shí)存在一定的上下振動。</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 id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;"> </span></span><span id="n1l1njb9b" class="2">山圖</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">b</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span id="n1l1njb9b" class="2">和圖</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">c</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span id="n1l1njb9b" class="2">可看出，</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Y</span></span><span id="n1l1njb9b" class="2">向和</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span id="n1l1njb9b" class="2">向的幅頻特性曲線在180</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: PMingLiU;">?</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">190</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz </span></span><span id="n1l1njb9b" class="2">范圍內(nèi)時(shí)有較大的幅值，對應(yīng)整機(jī)第12階模態(tài)，其頻率為</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">187.6</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span id="n1l1njb9b" class="2">，</span><span id="n1l1njb9b" class="2">振型為主軸箱沿中 間面扭振，其中在</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span id="n1l1njb9b" class="2">方向上的振動較為明顯。</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 id="n1l1njb9b" class="2">由圖</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">3.2 (</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">c</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">)</span></span><span id="n1l1njb9b" class="2">可看出，</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span id="n1l1njb9b" class="2">方向的幅頻特性曲線在</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">210</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span id="n1l1njb9b" class="2">附近有較大的幅值，對 應(yīng)整機(jī)第13階模態(tài)，其頻率為</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">207.8</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span id="n1l1njb9b" class="2">，</span><span id="n1l1njb9b" class="2">振型為立滑板及工作臺的前后擺動。整機(jī)第 13階模態(tài)振型如圖</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">2.7</span></span><span id="n1l1njb9b" 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 id="n1l1njb9b" class="2">由上可知，機(jī)床在屮低轉(zhuǎn)速時(shí)立柱的振動較為明顯，由此推斷立柱與床身結(jié)合面特 性參數(shù)對其有一定影響。立柱床身之間采用12個(gè)</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">M</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">24</span></span><span id="n1l1njb9b" class="2">的螺栓連接，現(xiàn)將其有限元模型 中該部分的結(jié)合面特性參數(shù)改為用</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">M</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">28</span></span><span id="n1l1njb9b" class="2">的螺栓連接計(jì)算所得數(shù)據(jù)，再次進(jìn)行整機(jī)模態(tài) 分析，提取前20階模態(tài)，其中前兩階為絲杠自身膨脹，第3~20階頻率如表</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">2.6</span></span><span id="n1l1njb9b" 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 id="n1l1njb9b" class="a1">表</span><span id="n1l1njb9b" class="a1"><span style="font-size: 9pt; font-family: SimSun;">2.6</span></span><span id="n1l1njb9b" class="a1">修改參數(shù)后整機(jī)前20階鬧冇頻率（單位：</span><span id="n1l1njb9b" class="SegoeUI"><span lang="EN-US" style="font-size: 9pt;">Hz</span></span><span id="n1l1njb9b" 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 id="n1l1njb9b" class="210pt">階次</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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" class="210pt">頻率</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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" class="210pt">階次</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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" class="210pt">頻率</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 id="n1l1njb9b" class="210pt"><span style="font-size: 9pt; font-family: SimSun;">2</span></span><span id="n1l1njb9b" class="2SegoeUI"><span lang="EN-US" style="font-size: 9pt;">0</span></span><span id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" 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 id="n1l1njb9b" class="2"><span style="line-height: 16px;">對比表可以看出，修改床身立柱結(jié)合面參數(shù)后的整機(jī)固有頻率有所提高，且高階頻</span>率提高的幅度比低階大，證明了該推斷是正確的。</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 id="n1l1njb9b" class="2">中低階時(shí)立柱的振動較為明顯，由此也帶動了立滑板和主軸箱的振動，第8階為工 作臺的振動，高階則主要是立滑板和主軸箱的振動。高階振型對應(yīng)的剛度和阻尼值都較 大，而該機(jī)床的轉(zhuǎn)速屬于中低速范圍實(shí)際情況中不會出現(xiàn)這樣的情況，在研究整機(jī)動態(tài) 特性時(shí)不關(guān)心高階頻率和振型。之后的章節(jié)將對立柱和</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">Z</span></span><span id="n1l1njb9b" class="2">向進(jìn)給系統(tǒng)進(jìn)行進(jìn)-</span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: 'Times New Roman';">•</span></span><span id="n1l1njb9b" class="2">步的分析 和優(yōu)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 id="n1l1njb9b" class="64"><span style="font-size: 9pt; font-family: SimSun;">2.5</span></span></a><span id="n1l1njb9b" class="64">本章小結(jié)</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 id="n1l1njb9b" class="2">本章首先對</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">SGM</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">50</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">A</span></span><span id="n1l1njb9b" class="2">臥式加工中心的整體結(jié)構(gòu)及特點(diǎn)進(jìn)行了簡單的介紹，建立了適 合有限元網(wǎng)格劃分的三維</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">CAD</span></span><span id="n1l1njb9b" class="2">模型，接著闡述了一種固定結(jié)合面和兩種滾動結(jié)合面在 有限元中的模擬方法，在</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">HyperMesh</span></span><span id="n1l1njb9b" class="2">中劃分了網(wǎng)格并設(shè)置了單元類型和材料屬性，采用 </span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">ANSYS</span></span><span id="n1l1njb9b" class="2">中的用戶自定義單元</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">MARTIX</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">27</span></span><span id="n1l1njb9b" class="2">來模擬零件之間接觸面的動力學(xué)特性，在此基 礎(chǔ)上建立了 </span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">SGM</span></span><span id="n1l1njb9b" class="2"><span style="font-size: 9pt; font-family: SimSun;">50</span></span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US" style="font-size: 9pt;">A</span></span><span id="n1l1njb9b" class="2">整機(jī)有限元模型；然后參照固定結(jié)合面模擬邊界條件，將結(jié)合面 特性數(shù)據(jù)代入整機(jī)有限元模型中進(jìn)行計(jì)算，得到了各階模態(tài)的頻率和振型；再以主軸前 端為施力點(diǎn)工作臺上一點(diǎn)為輸出點(diǎn)，提取了主軸與工作臺之間三個(gè)方向的相對位移幅頻 曲線；最后聯(lián)系兩方面的分析結(jié)果得出床身和立柱之間的結(jié)合面對整機(jī)動態(tài)性能影響較 大，并指出機(jī)床的薄弱部件，為之后的優(yōu)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:宋體;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:宋體;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:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">臥式加工中心動態(tài)特性分析及關(guān)鍵部件的優(yōu)化”，因?yàn)榫庉嬂щy導(dǎo)致有些函數(shù)、表格、圖片、內(nèi)容無法顯示，有需要者可以在網(wǎng)絡(luò)中查找相關(guān)文章！本文由伯特利數(shù)控整理發(fā)表文章均來自網(wǎng)絡(luò)僅供學(xué)習(xí)參考，轉(zhuǎn)載請注明！</span><span lang="EN-US" style="font-size:9.0pt"> <o:p></o:p></span></p></div> <div id="n1l1njb9b" class="blank30"></div> <!-- tag --> <div id="n1l1njb9b" class="blank10"></div> 標(biāo)簽： <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'>臥式加工中心</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 href='/index.php?case=tag&act=show&tag=%E9%AB%98%E9%80%9F%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>高速加工中心</a> <!-- 分類 --> <div id="n1l1njb9b" class="blank10"></div> 分類： <a href='/bethel/type/jnc/type-1.html' 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