产品设计中的计算机辅助公差分析

NuclearPowerEngineering305200910Vol.30.No.5(S1)Oct.20090258-0926(2009)05(S1)-0082-04610041CATMonte-Carlo3CATVSAVSATP31TH124TL351A1[1]CATCAT[2]1978HillyardCATVSACETOLTol-MateDCSCATCATVSA2Monte-Carlo[3,4]2.1∑==niiiTaT1Y1ai1=ia/iixfa∂∂=；TYYTii100%2.22009-09-08；2009-10-2283Y()∑==niiiizTaZT12Y2ZziYi63.464195.45%4.45106.4858Y2()∑==niiiTaT12Y3100%2.3Monte-CarloMonte-CarloMonte-CarloMonte-CarloMonte-Carlo4Monte-CarloDYiNY4~7∑==NiiNDm1YY1/4()/12Y1YY2∑=−=NiiNmDm5()∑=−=NiiNmDm13Y1YY3/6()14Y1YY4/NiiNmDm==－76/Y2YmT=8Monte-CarloKarlPearsonVSATol-Mate()()()[]()[]321234462KU2KU2U2KSKSKKSK－+−+=9SKKUKSKKU181PearsonTable1TypesofPearsonDistributionPearsonK=0SK=0KU=0K0K=0SK=0KU02KU=3(SK)2t0K1K=1K1tK=0SK=0KU0Monte-CarloVSA[5]Monte-Carlo①20000031Vol.30.No.5(S1).2009841Fig.1BasicProcessforComputerAidedToleranceAnalysis12CAD3VSA4——4CATCpCpk2RPV2Fig.2ToleranceAnalysisResultwithWorstCaseAnalysisMethodMonte-Carlo34423Monte-Carlo3485CpCpk5CATCAT[1].[J].,2002,6:30~34.[2],,.[J].,2004,8:74~76.[3],.[J].,2006,3:73~75.[4],,.[J].,2001,24~5.[5],,.[J].,2005,3911:14~15.ApplicationofComputerAidedToleranceAnanlysisinProductDesignDUHua(NationalKeyLaboratoryofReactorSystemDesignTechnology,NuclearPowerInstituteofChina,Chengdu,610041,China)Abstract:Thispaperintroducestheshortageofthetraditionaltolerancedesignmethodandthestrongpointofthecomputeraidedtolerancing(CAT)method,comparestheshortageandthestrongpointamongthethreetoleranceanalysismethods,whichareWorstCaseAnalysis,StatisticalAnalysisandMonte-CarloSimulationAnalysis,andoffersthebasiccoursesandcorrelativedetailsforCAT.Asthestudyobjects,thereactorpressurevessel,thecorebarrel,thehold-downbarrelandthesupportplateareusedtoupbuildthetolerancesimulationmodel,basedontheir3Ddesignmodels.Thenthetolerancesimulationanalysishasbeenconductedandtheschemeofthetolerancedistributionisoptimizedbasedontheanalysisresults.Keywords:Toleranceanalysis,CAT,VSA198320093Monte-CarloFig.3InitialToleranceAnalysisReportwithMonte-CarloSimulationMethod4Monte-CarloFig.4ToleranceAnalysisReportafterOptimizationwithMonte-CarloSimulationMethod