基于虛擬樣機技術的70t級新型通用敞車抗疲勞設計.pdf

1、分類號：UDC：U27393Y1404967學校代號：10150密級：——學號：G2004005峽建交積摯工程碩士學位論文基于虛擬樣機技術的70t級新型通用敞車抗疲勞設計ANTIFATIGUEDESIGNON70TNEWTYPEGENERALPURPOSEUSEOPENTOPWAGONBASEDoNVIRTUALMODELMACHINETECHNOLOGY學生姓名：校內導師及職稱：企業(yè)導師及職稱：工程領域：研究方向：申請學位：論文答辯日

2、期：學位授予單位：關曉麗兆文忠教授范國海高工車輛工程車輛CAE關鍵技術工程碩士2008年6月12日大連交通大學大連交通大學工程碩士學位論文AbstractWithimplementationofstridedevelopmentstrategyforChinaRailways，aseriesofheavyhaulbrandnewproductsrunningathigherspeedhavebeengivenbirthtothemark

3、etinrailwayindustrySincethesenewproductsputintoservice，theproblemoffatiguebreakagehasbecomemoreprominentthanbeforeHence，fordevelopmentof70tnewtypegeneralpurposeuseopentopwagon，ifthetraditionalstaticstrengthdesignphilosop

4、hywereusedforproductdesign，itwouldinevitablyresultinmuchmorestaticstrengthoftheproductstructureavailable，butinsufficientfatiguestrengthexistingthere，whichwouldbringintheserioussafetydangertothereliableserviceoftheproduct

5、Therefore，itisofgreatsignificanceinrealityincarryingoutanti—fatiguedesignonwagonbodyof70tnewtypegeneralpurposeopentopwagonbasedonvirtualmodelmachinetechnologyThispaperpresentsthemajorresearchandstudyon70tnewtypegeneralpu

6、rposeUseopentopwagoninthefollowingaspects、Ⅳitllcarefulstudyofkeytechnicalknow—howofvirtualmodelmachinetechnology，thatistosay，onthebasisofperformancesimulationtechnology：Atfirst，consideringthestructurefeatureandtechnicalp

7、arametersof70tnewtypegeneralpurposeuseopentopwagon，thedetailedFEAmodelisestablishedforthewagonbodyThenthestaticstrengthanalysisandmodularanalysisisdoneonthemodelinaccordance、崩tllTB／T13351996“StrengthDesignandTestAccredit

8、ationSpecificationforRailwayRollingStock”ThepositionofthewagonbodyforthecrackmoreeasilyoccurringisfinalizedonthebasisoftheresultofstaticstrengthanalysisandweldingtypesforthestructureSecondly，theanti—fatiguedesignonthewel

9、dingseamonthekeypositionofwagonbodyfor70tnewtypegeneralpurposeuseopentopwagonisperformedbasedontheresultsoffiniteelementstaticstrengthanalysis，aspervariousloadspectrumsinAARstandardandduedynamicstressVStime，thencharacter

10、isticcalveofvariousweldingjointsasdescribedinAARstandardandMinerdamagetheoryFinally，uponcompletionofprototypewagonproduction，thefatiguelifeforecastiscarriedoutwitlltheresultofthestaticstrengthtestandtheloadspectruminAARs

11、tandardalsoincontrastwiththelifeforecastwiththeresultofFEA，whichillustratesthatweakpositionisbasicallythesameaseachotherItshowsthatitisgreatlysignificantandfeasibleforantifatiguedesignonthebasisofvirtualmodelmachinetechn

12、ologyAnti—fatiguedesignon70tnewtypegeneralpurposeuseopentopwagonasdescribedinthispaperattachesgreatimportanceforthereferencetesearchanddevelopmentoffuturenewproductAstherearevariousfactorsaffectingfatiguelifeforecastandf