摘要
Ahigh-speedtrain-trackcouplingdynamicmodelisusedtoinvestigatethedynamicbehaviorofahigh-speedtrainoperatingonacurvedtrackwithfailedfasteners.Themodelconsidersahigh-speedtrainconsistingofeightvehiclescoupledwithaballastedtrack.Thevehicleismodeledasamulti-bodysystem,andtherailismodeledwithaTimoshenkobeamrestingonthediscretesleepers.Thevehiclemodelconsiderstheeffectoftheendconnectionsoftheneighboringvehiclesonthedynamicbehavior.Thetrackmodeltakesintoaccountthelateral,vertical,andtorsionaldeformationsoftherailsandtheeffectofthediscretesleepersupportonthecouplingdynamicsofthevehiclesandthetrack.Thesleepersareassumedtomovebackwardatacon-stantspeedtosimulatethevehiclerunningalongthetrackatthesamespeed.ThetrainmodelcoupleswiththetrackmodelbyusingaHertziancontactmodelforthewheel/railnormalforcecalculation,andthenonlinearcreeptheorybyShenetal.(1984)isusedforwheel/railtangentforcecalculation.Intheanalysis,acurvedtrackof7000-mradiuswithfailedfastenersisselected,andtheeffectsoftrainoperationalspeedandthenumberoffailedfastenersonthedynamicbehaviorsofthetrainandthetrackareinvestigatedindetail.Furthermore,thewheel/railforcesandderailmentcoefficientandthewheelsetloadingreductionareanalyzedwhenthehigh-speedtrainpassesoverthecurvedtrackwiththedifferentnumberofcontinuouslyfailedfastenersatdifferentoperationalspeeds.Throughthedetailednumericalanalysis,itisfoundthatthehigh-speedtraincanoperatenormallyonthecurvedtrackof7000-mradiusatthespeedsof200km/hto350km/h.
出版日期
2013年09月19日（中国期刊网平台首次上网日期，不代表论文的发表时间）
