User Guide: FEA Solid Modeling, Meshing and Analysis
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User Guide: FEA Solid Modeling, Meshing and Analysis A Seminar for Simulation Engineers George Laird, PhD, PE – Principal Mechanical Engineer Max Breedlove, MSME, FE – Staff Mechanical Engineer
Transcript of 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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TABLEOFCONTENTS1. WHYWEAREHERE:FEASOLIDMODELING,MESHINGANDANALYSIS..........................................................................5
1.1 WHATWEWILLCOVER..................................................................................................................................................................................51.2 WHATWEDON’TCOVER................................................................................................................................................................................5
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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.
