Solidworks有限元分析教程.ppt

1 有限元分析用户培训 Jim YueDDSSoftwareCo 目录 企业需求与有限元分析 DesignAnalysis 更少的样机 省钱更短的周期 省时更好的质量 品质 有限元分析的主要步骤 前处理建立分析对象的有限元模型求解对有限元模型的计算工况进行求解后处理观察分析结果 评估设计是否符合要求 Cosmos Works有限元分析的步骤 建立几何模型定义材料属性定义边界条件 约束和载荷 划分网格求解查看和评估结果 Cosmos Works的用户界面 Cosmos Works的工具条 定义 修改 删除专题 定义材料 生成有限元网格 对当前专题进行计算 在几何模型 有限元模型之间进行切换显示 从所选的特征中选择面元 Cosmos Works的选项对话框 Cosmos Works线性静力分析 例1 支座分析例2 轴承载荷例3 壳单元 静水压例4 Motion 远端载荷 线性静力分析 定义专题 Displacementintheradialdirection Select Axis1 andthendefinedisplacementplotinX direction radialtotheaxis Selectdeformationscale 1Right clickonthedisplacementploticon plot2 andthenselect Listselected Averagedisplacementof polepiecelower 0 0019504 decreaseinradius Averagedisplacementof polepieceupper 0 007896 increaseinradius Sumofthese2displacement 0 009846 Initialinterfernceof0 01 HoopStress tangential Select Axis1 andthendefinestressplotinY direction radialtotheaxis Selectdeformationscale 1Right clickonthestressploticon plot2 andthenselect Listselected Negativestresson polepiecelower compression Positivestresson polepieceupper tension 线性静力分析 定义材料属性 SimulatepartswhichareseparatedbylargegapsFirstrunthemodelwithsmalldisplacementoptionandlookattheresultsIfyouseethatthereisachangeintheorientationofthecontactsurfacesduringloadingoriftheresultsdoesn tlookrealistic uselargedeflectionoption Example1 Example2 线性静力分析 网格划分 Open RectangleGap sldasm Defineastaticstudy smallcontact Applymaterial Alloysteel tobothpartsApplyapressureof725psionthetopfaceSelectthetwofrontfacesandthenapplyrestraint SelectFlatfaceoptionandthenselect Normaltoface Fixtheleftsemi circularfaceHidetheloads bcsymbolsDefine Surface contactbetweenthetopfaceofthebottomlegandtheperpendicularfaceCreatemeshandrunDefineastressplotwithscalefactor 1 Lookatthecontactsurface Thisproblemrequireslargedisplacementnonlinearcontact 线性静力分析 定义约束 Defineanewstaticstudy LargeDisp Drag ndropthematerialandloads bcfoldersfrom smallcontact studyRight clickonthestudynameandclickonproperties Select Largedisplacementcontact option RuntheanalysisDefineastressplotwithscalefactor 1 Lookatthecontactarea Looksreal 线性静力分析 定义载荷 Simulateheatresistancebetweenpartsforthermalanalysis Accountforheatresistanceofthinpartswithoutactuallymodelingthem Definethermalconductivityatthecontactareatomodelthepropertiesofthegluebetweenthechipandthesubstrate 线性静力分析 求解 Open Thermalcontactresistance transistor sldasm Explodethemodelandsetpreferredunitsto SI andtemperatureunitsto Kelvin Defineathermalstudy NoRes Applymaterial AISI304 for Voltageregulator and Copper forHeatsinkDefine Surface contactwithNoresistancebetweenthecontactfacesApplyconvectiontoallthefacesofthemodelexceptthecontactfacesFilmcoefficient 250W m 2 K Bulktemperature 298K 线性静力分析 观察结果 ApplyHeatpower 25Wfor Voltageregulator MeshwithdefaultsettingsandruntheanalysisNoticethetemperaturedistributionoftheheatsinkDistributedResistance Defineanewthermalstudy DistRes Drag ndrop Material folderandLoads BcfolderfromNoResstudytoDistResstudyEditcontactpairdefinitionanddefinedistributedresistance 0 005K m 2 WTotalresistance DistributedresistanceXContactarea 0 005X0 0003392 14 7K WRunthestudy DistRes Noticethetemperaturedistributionoftheheatsink ThermalContactExample Cont d ProbethetemperaturevalueDefineathermalplotwithmeshRight clicktheploticonandselectProbePickallthenodesontheedgeofboththepartsClickonthePloticontoviewthetemperaturevariationfromthetopfaceofthevoltageregulatortothebottomoftheheatsink ThermalContactExample Cont d TotalResistance Defineanewthermalstudy TotalRes Drag ndrop Material folderandLoads BcfolderfromNoResstudytoTotalResstudyEditcontactpairdefinitionanddefineTotalresistance 25K WRunthestudy TotalRes Noticethetemperaturedistributionoftheheatsink LoadSimulation RemoteLoads RemoteLoadsDirectTransferFlexiblesurfaceAppliedasequivalentforce momentRigidBeamRigidsurfaceRemoteRestraintRigidconnectionModeleffectofarigidvirtualpartbetweentwofaces Force MomentfromMotionSimulationatthispointappliedontheselectedface RemoteLoadExample Open RemoteLoadExample sldasm Defineastaticstudy Remote Applymaterial Alloysteel FixtheflatfaceSelect Coordinatesystem1 andtheendfaceofthecantilever Defineremoteloadof10NintheXdirection Createmeshandrun Double clickon Plot1 underthestressfolderAnimatetheresultsComparetheplotresultsof Remote studywith AxialTension study MotionLoadTransferUsingRemoteLoads GotoSWAdd inandclick COSMOS Motion Open LoadTransferModel With Result sldasm Playtheanimationandsavetheloadfileforframe 300DeletethemotionresultsGotoCWmenu ImportMotionLoadandopenthisloadfilefrom MotionLoadTransfer directorySelectalltheloadsrelatedtocrank 1andthenclickOK Openthepart crank You llseethatthereisanewstudy Frame 300 withmotionloadstransferredasremoteloadsApplymaterial Plaincarbonsteel Gotostudypropertiesandselect FFEPlus solverand Inertiareliefoption Runtheanalysis Postprocessing ResultsinlocalCS PlottingListingsReactionforces Postprocessing Explodedviews PlotresultsonSolidWorksexplodedviews Postprocessing Newtools ImprovedprobingwithgraphingoptionListresultsbyEntity WebReports InclusionofreporttemplatesinthefeaturetreeSavingofreportsettingAutomaticcreationofallplots ReportExample Open ReportExample sldasm NewoptionsaveJPEGfiles Right clickontheStudyname Right clickonReportandclickdefinePointtothelogofile ReportLogo bmp PointtotherightstressAVIandVRMLfilesSelectoption AutomaticallyupdateallplotsinJPEGfiles ClickOK Youcanalsogetaprintversion Material SupportsorthotropicmaterialpropertiesforsolidsandshellsOptiontousedifferentMaterial