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12号高锰钢整铸辙叉及其改进型受力分析比较.doc

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(完整word版)12号高锰钢整铸辙叉及其改进型受力分析比较(完整word版)12号高锰钢整铸辙叉及其改进型受力分析比较(完整word版)12号高锰钢整铸辙叉及其改进型受力分析比较ComparisonandLoadAnalysisforNo。12MonoblocManganeseFrogandItsImprovedTypeYangCAO,PingWANG，XiaopingCHENSchoolofCivilEngineering，SouthwestJiaotongUniversity，Chengdu610031,Sichuan,ChinaAbstract:Monoblocmanganesefrogismadebycastingnoserailandwingrailtogether,anditsloadanalysisisverycomplicatedundertrainload.Thiskindoffroghasseveralweakpoints，sorepeatedtrainimpactsleadtodifferentfailureconsequences，includingcontactedfatiguewearingandfatiguecrack.Soanalyzingstresscharacteristicsforthenormaloperationoffrogisveryessential。TakingNo。12Monoblocmanganesefrogof75kg/mrailasanexample,aMonoblocfrogmodelwasmadeandthenexistingfrogandtwootherkindsofimprovedfrogswereanalyzedbyfiniteelementmethodforcomparison。TheanalysisshowsthatthefirstschemehashigherloadresistanceabilityandstrengthmarginHowever，thestrengthofflangewayversusdirectloadshouldbestudiedunderdynamicsituation.Keywords：No。12Monoblocmanganesefrog;improvedscheme；stresscharacteristics;finiteelementmethodFrogistheequipmentforthewheeltocrossfromonerailtoanother,whichiscomposedofcastingnoserail,wingrailandconnectioncomponents。Monoblocmanganesefrogismadebycastingnoserailandwingrailtogether，andisfullymachined。RigorousrequirementsareimposedtorailwayequipmentsduetoChineserailwaytransportationconditions:highdensity，largecapacity,bigaxleloadandmixedtransportationofpassengersandgoods,whichleadtodifferentfailureconsequencesofMonoblocmanganesefrogincludingcontactfatiguewearfailureandfatiguecrackfailure。Sinceitwasobservedhorizontalcrack，verticalcrackandseriousverticalwearinginNo.12Monoblocmanganesefrogsfor75kg/mrailslaidonDa-Qinheavyhaulrailway,itisnecessarytoanalyzestressofMonoblocmanganesefrogandtostudyitsstresscharacteristicsunderdifferentworkingconditionssoastoensurethesafetyandstabilityoftrainpassingandthenormaloperationoffrog。ThisarticleanalyzesandcomparesindetailthemechanicalperformanceofNo。12Monoblocmanganesefrogfor75kg/mrailandtha