基于幾何造型的參數(shù)化有限元建模和曲面網(wǎng)格生成方法及實(shí)現(xiàn).pdf

1、大連理工大學(xué)碩士學(xué)位論文基于幾何造型的參數(shù)化有限元建模和曲面網(wǎng)格生成方法及實(shí)現(xiàn)姓名：隋曉峰申請學(xué)位級別：碩士專業(yè)：計(jì)算機(jī)應(yīng)用技術(shù)指導(dǎo)教師：顧元憲關(guān)振群20020601墨王鹽盟堂型墮壟墼些查堡墨堡燮塑些亙塑塑圭墮杰些墨壅里AbstractFiniteelementmethodisapopularnumericalanalysismethod，whichiswidelyappliedinmanyindustrialfieldssuchasa

2、viation，architecture，mechanics，electronicsandchemistryIthasbecomethecriterionoftheanalysisanddesignoptimizationofstructures，andfiniteelementanalysis(FEA)softwarehasbecomethemostimportantpartofCAD／CIMSsystemFiniteelementm

3、odeling(FEM)isthepre—processofFEAItisbasedonCADsystem，andtiesFEAtechniquetoCADsystemMostoffiniteelementmodelingmethodsarestaticatpresent0neethedesignengineersfinishthefiniteelementmodel，itwillbeverydifficulttomodifythemo

4、delThisstaticfiniteelementmodelingmethoddoesn’tneedtherequirementofthedynamicdesignofproductinthemodernindustryOtherwise，mostworkonthesurfacemeshgenerationisbasedonthesingletrimmedsurfaces，andtheworktoclosedsurfaceandcom

5、binedsurface，whichareverypopularinengineer，isveryfewTosolvetheproblemsmentionedabove，theauthorstudiestheproblemscarefullyandgivesoutsomesolutionsAmethodofsurfacetriangulationbasedonthetraditionalmappingapproachispresente

6、dinthisthesisThemethodhasfonrfeatures：1)Virtualmovableboundariesaregiventoassistthemeshgenerationonclosedsurfaces2、Formakingthemeshesconsistentonthecommonboundariesofadjoiningsurfaces，anewapproachofboundarydiscretization

7、isemployed31Theboundary—representationstructureisadoptedtofulfillthemeshgenerationovercombinedsurfaces4)Thequalityofsurfacemeshesisimprovedbypointcreationon3DscanlinesanddiagonalswappingprocedureAnapplicationtomeshsurfac

8、esonlydependingongeometriesisdevelopedTheapplicationistightlyintegratewiththeCADpackageAutoCADfromAutodeskCorporationAmethodofparametricfiniteelementmodelingforshapeoptimizationispresentedinthisthesisThemethodhasthreefea

9、tures：11ThedimensionsusedincommercialCADsystemareselectedtobethedesignvariablesofshapeoptimization2)Amappingbetweengeometryobjectsandfiniteelementobjectssuchasmeshes，structurepropertiesissetuptoassistindefiningfiniteelem

10、entmodelsongeometries3)AnautomaticmeshgeneratorandamethodbywhichstructurepropertiesisassignedfromgeometryobjectstofiniteelementobjectsautomaticallyareusedtoupdatefiniteelementmodelsduringtheoptimizationprocessKeywords：pa