Ansysworkbench_Thermal_安世亚太培训.pdf

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1、CustomerTrainingMaterialLecture7ThermalAnalysisIntroductiontoANSYSMechanicalANSYS,Inc.ProprietaryRelease13.0©2010ANSYS,Inc.Allrightsreserved.L7-1November2010IntroductiontoANSYSMechanicalChapterOverviewCustomerTrainingMaterial•Inthischapter,performingsteady-statethermalanalysesinMechanicalwillb

2、ecovered:A.GeometryB.Assemblies–SolidBodyContactC.HeatLoadsD.SolutionOptionsE.ResultsandPostprocessingF.Workshop7.1•ThecapabilitiesdescribedinthissectionaregenerallyapplicabletoANSYSDesignSpacelicensesandabove,exceptforanANSYSStructurallicense.•Note:advancedtopicsincludingthermaltransientanaly

3、sesarecoveredintheANSYSThermalAnalysistrainingcourse.ANSYS,Inc.ProprietaryRelease13.0©2010ANSYS,Inc.Allrightsreserved.L7-2November2010IntroductiontoANSYSMechanicalBasicsofSteady-StateHeatTransferCustomerTrainingMaterial•Forasteady-state(static)thermalanalysisinMechanical,thetemperatures{T}ares

4、olvedforinthematrixbelow:[K(T)]{T}={Q(T)}•Assumptions:–Notransienteffectsareconsideredinasteady-stateanalysis–[K]canbeconstantorafunctionoftemperature–{Q}canbeconstantorafunctionoftemperatureANSYS,Inc.ProprietaryRelease13.0©2010ANSYS,Inc.Allrightsreserved.L7-3November2010IntroductiontoANSYSMec

5、hanicalBasicsofSteady-StateHeatTransferCustomerTrainingMaterial•Fourier’sLawprovidesthebasisofthepreviousequation:•Heatflowwithinasolid(Fourier’sLaw)isthebasisof[K]•Heatflux,heatflowrate,andconvectionaretreatedasboundaryconditionsonthesystem{Q}•Convectionistreatedasaboundaryconditionalthoughte

6、mperature-dependentfilmcoefficientsarepossible•ItisimportanttoremembertheseassumptionsrelatedtoperformingthermalanalysesinMechanical.ANSYS,Inc.ProprietaryRelease13.0©2010ANSYS,Inc.Allrightsreserved.L7-4November2010IntroductiontoANSYSMechanicalA.GeometryCustomerTrainingMaterial•Inthermalanalyse

7、sallbodytypesaresupported:–Solid,surface,andlinebodies.•Linebodiescross-sectionandorientationisdefinedwithinDesignModeler.•The“PointMass”featureisnotavailableinthermalanalyses.•Shellandlinebodyassumptions:–Shells:nothrough-thicknesstemp