曲轴的加工工艺及夹具设计外文翻译

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1、毕业设计外文翻译题目曲轴的加工工艺及夹具设计学院航海学院专业轮机工程学生佟宝诚学号10960123指导教师彭中波重庆交通大学2014年ProceedingsofIMECE20082008ASMEInternationalMechanicalEngineeringCongressandExpositionOctober31-November6,2008,Boston,Massachusetts,USAIMECE2008-67447MULTI-OBJECTIVESYSTEMOPTIMIZATIONOFENGINECRANKSHAFTSUSINGANINTEGRATIONAPPRO

2、ACHAlbertAlbers/IPEKInstituteofProductDevelopmentUniversityofKarlsruheGermanyNoelLeon/CIDyTCenterforInnovationandDesignMonterreyInstituteofTechnology,MexicoHumbertoAguayo/CIDyTCenterforInnovationandDesign,MonterreyInstituteofTechnology,MexicoThomasMaier/IPEKInstituteofProductDevelopmentUniv

3、ersityofKarlsruheGermanyABSTRACTTheeverincreasingcomputercapabilitiesallowfasteranalysisinthefieldofComputerAidedDesignandEngineering(CAD&CAE).CADandCAEsystemsarecurrentlyusedinParametricandStructuralOptimizationtofindoptimaltopologiesandshapesofgivenpartsundercertainconditions.Thispaperdes

4、cribesageneralstrategytooptimizethebalanceofacrankshaft,usingCADandCAEsoftwareintegratedwithGeneticAlgorithms(GAs)viaprogramminginJava.Anintroductiontothegroundingsofthisstrategyismadeamongdifferenttoolsusedforitsimplementation.Theanalyzedcrankshaftismodeledincommercialparametric3DCADsoftwa

5、re.CADisusedforevaluatingthefitnessfunction(thebalance)andtomakegeometricmodifications.CAEisusedforevaluatingdynamicrestrictions(theeigenfrequencies).AJavainterfaceisprogrammedtolinktheCADmodeltotheCAEsoftwareandtothegeneticalgorithms.Inordertomakegeometrymodificationstoourcasestudy,itwasde

6、cidedtosubstitutetheprofileofthecounterweightswithsplinesfromitsoriginal“arc-shaped”design.Thevariationofthesplinedprofileviacontrolpointsresultsinanimbalanceresponse.Theimbalanceofthecrankshaftwasdefinedasanindependentobjectivefunctionduringafirstapproach,followedbyaParetooptimizationofthe

7、imbalancefrombothcorrectionplanes,plusthecurvatureoftheprofileofthecounterweightsasrestrictionsformaterialflowduringforging.Thenaturalfrequencywasconsideredasanadditionalobjectivefunctionduringasecondapproach.Theoptimizationprocessrunsfullyautomatedandth