1、Workshop8目YPD后的位移和應(yīng)力.PSD譜通過(guò)G Acceleration 指定Workshop8目YPD后的位移和應(yīng)力.PSD譜通過(guò)G Acceleration 指定PSD譜可以指定為加速度譜、速度譜、位移譜譜可以來(lái)自于實(shí)際的物理測(cè)量或者相應(yīng)的規(guī)范指定固定Inventory#002406 July10, 2007ANSYS,ANSYS,Inc.s.Workbench- Workshop8起始從WorkBenchProjectLauncher點(diǎn)擊Simulation”如果進(jìn)入“Simulation，點(diǎn)擊 “NoWorkshop8起始從WorkBenchProjectLauncher點(diǎn)擊

2、Simulation”如果進(jìn)入“Simulation，點(diǎn)擊 “NodonotsaveanyNote: This PSD could be performed as a continuation of the prior Wing Modal exerciseifthedsdbhadbeen saved to your harddrive.Onalargecomplextmightsaveaof time &However,forthisexercise,we will start again from scratch and import the geometry, assign materi

3、alproperty, and insert the fixed boundary condition again.Inventory#002406 July10, 2007ANSYS,ANSYS,Inc.s.Workbench-Workshop8設(shè)當(dāng)導(dǎo)入幾何模型之后，從“Map of Types”選擇“RandomVibration”。Workshop8設(shè)當(dāng)導(dǎo)入幾何模型之后，從“Map of Types”選擇“RandomVibration”。在“Number of Modes”中輸入15,點(diǎn)擊選系統(tǒng)“UnitsU.S.Customary(in,lbm,lbf,F,s,V,1342Inven

4、tory#002406 July10, 2007ANSYS,ANSYS,Inc.s.Workbench-Workshop8前處的材在樹中Workshop8前處的材在樹中點(diǎn).在 “Material”中,單擊下拉菜單Import，然后從Workbench材料庫(kù)中選擇“Titanium Alloy”.56Inventory#002406 July10, 2007ANSYS,ANSYS,Inc.s.Workshop8環(huán)7約束機(jī)翼的遠(yuǎn)端. Modal分支下，選擇定端約束 InsertFixed Supports.固必要，切換Workshop8環(huán)7約束機(jī)翼的遠(yuǎn)端. Modal分支下，選擇定端約束 Inse

5、rtFixed Supports.固必要，切換至面選擇模式8用左鍵選擇端部的面“Depth，或者旋轉(zhuǎn)模型9DepthInventory#002406 July10, 2007ANSYS,ANSYS,Inc.s.Workbench-Workshop8環(huán)對(duì)于PSD基礎(chǔ)激勵(lì)載荷，在Random Vibration分中，選擇InsertPSDBase在PSDWorkshop8環(huán)對(duì)于PSD基礎(chǔ)激勵(lì)載荷，在Random Vibration分中，選擇InsertPSDBase在PSD載荷的Details窗口中89Inventory#002406 July10, 2007ANSYS,ANSYS,Inc.s.W

6、orkbench- Workshop8環(huán)PSD譜輸入形式選擇“PSD G Acceleration” Workshop8環(huán)PSD譜輸入形式選擇“PSD G Acceleration” 點(diǎn)擊 輸入表格數(shù)據(jù)FREQvs.G曲線圖根據(jù)輸入的每個(gè)數(shù)據(jù)點(diǎn)自動(dòng)更新關(guān)閉退出窗Inventory#002406 July10, 2007ANSYS,ANSYS,Inc.s.Workshop8求Workshop8求(準(zhǔn)備好(完成求解注意:點(diǎn)擊工具條的求解，將會(huì)求解所有如希望只求解一個(gè)分支的話，點(diǎn)相應(yīng)的分支進(jìn)行求解即可Inventory#002406 July10, 2007ANSYS,ANSYS,Inc.s.Wor

7、kbench-Workshop8模態(tài)當(dāng)求解完畢，可以查看每階頻率對(duì)應(yīng)的振型Workshop8模態(tài)當(dāng)求解完畢，可以查看每階頻率對(duì)應(yīng)的振型點(diǎn)擊Modal分支的 “Tabular Data”的“Frequency” 點(diǎn)擊鍵選擇“CreateModeInventory#002406 July10, 2007ANSYS,ANSYS,Inc.s.Workbench-Workshop8隨機(jī)振動(dòng)結(jié)現(xiàn)在查看隨機(jī)振動(dòng)結(jié)果如下結(jié)果 應(yīng)變 應(yīng)力 可選Workshop8隨機(jī)振動(dòng)結(jié)現(xiàn)在查看隨機(jī)振動(dòng)結(jié)果如下結(jié)果 應(yīng)變 應(yīng)力 可選擇選擇選擇InsertStressEquivalent (von Inventory#00240

8、6 July10, 2007ANSYS,ANSYS,Inc.s.Workbench-Workshop8評(píng)記住模態(tài)振型的位移是相對(duì)的，并不是實(shí)際的位移Workshop8評(píng)記住模態(tài)振型的位移是相對(duì)的，并不是實(shí)際的位移.輸入的PSD譜決定了響應(yīng)幅值的大小阻尼數(shù)據(jù)同樣影響了反應(yīng)的幅值Scoperesultsatendof 按鈕“Edges” 下可以選擇是否顯示單元以及變形圖圖例控制點(diǎn)擊云圖圖例，添加和減少顏色等Inventory#002406 July10, 2007ANSYS, ANSYS,Inc.s.Workbench-Workshop8評(píng):PSD分析的輸出結(jié)果是1（1倍標(biāo)準(zhǔn)差）值Workshop8評(píng):PSD分析的輸出結(jié)果是1（1倍標(biāo)準(zhǔn)差）值（零均值），結(jié)果滿分布. 可以解釋為，在68.3%時(shí)間內(nèi)，響應(yīng)值會(huì)低于1倍標(biāo)準(zhǔn)差值. 2對(duì)應(yīng)的是95.91% ， 3對(duì)應(yīng)的是99.737% 因?yàn)榕c方向有關(guān)的結(jié)果在本質(zhì)上是統(tǒng)計(jì)性質(zhì)的，因此不能像