user guide: fea solid modeling, meshing and analysis

UserGuide:FEASolidModeling,MeshingandAnalysisASeminarforSimulationEngineers

GeorgeLaird,PhD,PE–PrincipalMechanicalEngineerMaxBreedlove,MSME,FE–StaffMechanicalEngineer

UserGuide:FEASolidModeling,MeshingandAnalysis 2020

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UserGuide:FEASolidModeling,MeshingandAnalysis 2020

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UserGuide:FEASolidModeling,MeshingandAnalysis 2020

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TABLEOFCONTENTS1. WHYWEAREHERE:FEASOLIDMODELING,MESHINGANDANALYSIS..........................................................................5

1.1 WHATWEWILLCOVER..................................................................................................................................................................................51.2 WHATWEDON’TCOVER................................................................................................................................................................................5

UserGuide:FEASolidModeling,MeshingandAnalysis 2020

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1. WHYWEAREHERE:FEASOLIDMODELING,MESHINGANDANALYSIS

Prettymuchanybodycantakeachunkofjunkorasonemightsaya“potato”meshit,applysomeboundaryconditionsand,withaclick-of-a-mouse,generatesomecolors.Butasweknow,itcanbealonganddifficultroadtoturncolorsintoaverifiedsimulationthathasachancethatitmightbeaccurate.Thisseminarwillfocusonshowinghowtoidealizesolidgeometryintoefficientnumericalmodelsthatarequicktorunandcangenerateaccurateresults.Whyisspeedimportant?Becausetogetananswerthatyoucantrustoftenmeansrunningthesamemodeldozensoftimes.So,wewillcoverhowtotakeachunkofjunk,meshtheimpossible,hexwhatishexableandtettherest,discusselementqualityandthenhowtomakeitrunquickly.

1.1 WHATWEWILLCOVERo DifficultGeometryisRealGeometry:GeometryCleanup(removingblends),MeshPreparationo WhyisHexingsoDifficultandWhyShouldWeCare–ANodtoThosethatjustTetEverythingo BeingCleverwithyourGeometryBattles–Let’sStepBackandThinkabouttheAnalysisObjectiveo WhyDoSoManySimulationEngineersThinkThatMeshRefinementMakesAnAccurateAnalysis?o EasyWaystoCheckYourMeshResolution(NormalModesAnalysis)toDetermineIfItisGoodEnougho Don’tFallInLovewith10-NodeTetsandIfYouDo,UsetheIterativeSolvero Lastly,IfItLooksGood,MostLikelyItIsGood

1.2 WHATWEDON’TCOVER• BiasTowardAnyOneFEASoftwareProgram–ThisSeminarisforAnyandAllSimulationEngineers• ThatFEAisforEverybody,asoneChiefEngineertoldme“manyengineersthinkthattheymightenjoy

simulation…”So,wearenotgoingtosugarcoatanything.Gettingthe“right”answerishardworkandnoFEAprogramcreatedonthiswonderfulgreenearthisgoingtoensurethatyouwillgettherightanswer–onlythruyourhardthinkingisthewayforward.