拔伸水壓機前梁失效分析及結構優(yōu)化.pdf

1、華中科技大學碩士學位論文拔伸水壓機前梁失效分析及結構優(yōu)化姓名：黃興夢申請學位級別：碩士專業(yè)：材料加工工程指導教師：陳柏金20070530華中科技大學碩士學位論文華中科技大學碩士學位論文AbstractThisarticleisaimtofindthecauseofthefwardgirderfailureproblembyFiniteElementMethod(FEM)toolthenoptimismitsstructure.Thefw

2、ardgirderisakeypartofTractionhydraulicpressmaterialprocessingsystemtherearefivecolumnholestwelvecavuminitmanyholesonitsurfacetoothestructureisverycomplex.Thefwardgirderisaffectedbyingotheatpartlycracksfrequently.FEMisthe

3、mosteffectivewaytosolvethisquestion.FEMcansolvemathematicsphysicalequationseffectivelyincludingthermalstructuralmagicfieldsproblem.FiniteelementCAEanalysissoftwareisaresultwhichthecomputertechnologynumericaltheycombinedw

4、ithFEMdevelopment.Itisthemostidealtooltodofiniteelementanalysis.ItcanadapttostructurecomplexvarietyofloadslinearnonlinearStructuralFailureproblem.Designparametermodeltooptimizationpartstructuredimension.Thearticledivides

5、intothreemajparts:Thermalanalysisthermalstressanalysisstructuresizeoptimization.Thermalstressistheefficientamseofgirdercrack.Sothermalanalysisstructuralanalysiswascarriedatfirst.Thermalanalysisresultswereprocessedtotempe

6、raturefieldthermalgradientgettingthermalexpansiontrendheattransferdirectionfromthermalanalysis.Structuralanalysisresultswereprocessedtodisplacementstressfield.DisttiontrendprocessdistributionofstresswererevealedbyStructu

7、ralanalysisdetectthepossiblelocationofcrackThermalstressanalysisisthebasisofstructureoptimization.Thicknessofgirderisthekeydimension.ThisarticlecreateparametermodelusingANSYSparameterdesignlanguage(APDL)throughaseriesofa