Solidworks有限元分析.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,SimulatepartswhichareseparatedbylargegapsFirstrunthemodelwithsmalldisplacementoptionandlookattheresultsIfyouseethatthereisachangeintheorientationofthecontactsurfacesduringloadingoriftheresultsdoesntlookrealistic,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”Dragndropthematerialandloads/bcfoldersfrom“smallcontact”studyRight-clickonthestudynameandclickonproperties.Select“Largedisplacementcontact”option.RuntheanalysisDefineastressplotwithscalefactor=1.Lookatthecontactarea.,Looksreal!,线性静力分析：定义载荷,SimulateheatresistancebetweenpartsforthermalanalysisAccountforheatresistanceofthinpartswithoutactuallymodelingthem!,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/(m2.K)Bulktemperature=298K,线性静力分析：观察结果,ApplyHeatpower=25Wfor“Voltageregulator”MeshwithdefaultsettingsandruntheanalysisNoticethetemperaturedistributionoftheheatsinkDistributedResistance:Defineanewthermalstudy“DistRes”Dragndrop“Material”folderandLoads/BcfolderfromNoResstudytoDistResstudyEditcontactpairdefinitionanddefinedistributedresistance=0.005K.m2/WTotalresistance=DistributedresistanceXContactarea=0.005X0.0003392=14.7K/WRunthestudy“DistRes”Noticethetemperaturedistributionoftheheatsink,ThermalContactExample(Contd),ProbethetemperaturevalueDefineathermalplotwithmeshRight-clicktheploticonandselectProbePickallthenodesontheedgeofboththepartsClickonthePloticontoviewthetemperaturevariationfromthetopfaceofthevoltageregulatortothebottomoftheheatsink,ThermalContactExample(Contd),TotalResistance:Defineanewthermalstudy“TotalRes”Dragndrop“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”Youllseethatthereisanewstudy“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