wheel rail contact elements incorporating irregularities

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1、AdvancesinEngineeringSoftware36(2005)827837www.elsevier.com/locate/advengsoftWheel-railcontactelementsincorporatingirregularitiesC.J.Bowe*,T.P.MullarkeyDepartmentofCivilEngineering,NationalUniversityofIreland,Galway,IrelandReceived25November2003;acce

2、pted17March2005Availableonline22August2005AbstractTheaimofthisstudyistosimulatethedynamicverticalresponseofavehicletraversingrigidrailsandarailwaybridge.Thisisachievedbyusingtheauthorswheel-railcontactelement(WRC)tomodelthedynamicinteractionthatexist

3、sbetweenasprungwheel,usingaHertzianspring,andtherail.Theobjectiveincreatingtheseelementswastomodeltherailandwheelirregularities,whichwasnotafeatureofthecontactelementswithintheANSYSfiniteelementprogram.Inthispaperthenumericalresultsgeneratedusingtheau

4、thorsWRCelementareidenticaltotheresultsgeneratedusingthecommercialcontactelementofANSYSforasmoothrailcondition.Inthecaseofirregularrails,thenumericalresultsgeneratedusingtheauthorsWRCelementscompareveryfavourablywiththeresultsfromtheliterature.q2005C

5、ivil-CompLtdandElsevierLtd.Allrightsreserved.Keywords:Wheel-railcontactelement;Hertzianspring;Rigidrails;Irregularities1.Introductionincludetheadditionalconvectiveaccelerationsduetothewheelasittravelsalongthebeam.Intheauthorsmodel,theInrecentyears,re

6、searchonthedynamicresponseofwheelisrepresentedbyasprungmass,thusaHertziantrainsandrailwaybridgeshasbecomeanimportanttopicinspringexistsbetweenthewheelandtherailandissimulatedcivilengineering.EngineersandresearchershaveabymeansoftheWRCelements.Inthisc

7、ase,thewheelandresponsibilityforensuringthesafepassageoftrainsbeamnolongerhavethesamedeflection;hencethetraversingrailsandrailwaybridgesbycarryingoutadditionalconvectiveaccelerationsduetothewheelareextensiveresearchonexistingstructures.Muchofthenotreq

8、uired.dynamicresponsethatthebridgeandvehicleexperienceTheauthorstechniqueinvolvesmodellingeachwheelascanbeattributedtothecontactthatexistsbetweenthewheelaHertzianspringperpendiculartothesurfaceoftherail.andtherail.Therefore,bymodellingthedifferentwhe