车轮磨耗与其对车辆动力学性能的影响

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1、西南交通大学硕士研究生学位论文第H页AbstractWheelwearisacommonprobl锄inmilwayn孤sportation．Wheelwearcausesch锄geofwheelprofilein也elateralandcircumferentialdiI．ectio璐ofwheel臼．ead，andthusmaycause铲eatchangeinmew，heel—milcontactrelationship，whichmayleadt0tlledegradeofd)咄珊icresponseofVehicl

2、es．Asurveyf．oundthatthefonnofthe、)l，_heelwearV撕esn．omconditionsofbotll舰ckandvehicle．Itisalsof．oundmatthefIonnofwheelwearhavedirectinfluenceonmesafe劬s协bili劬andcostofthe叩emtionofhighspeed昀iIls．nlewheelwearhasbecomeoneofmem萄0rprobleIIlsinⅡ1ehigh·speedrailways，觚dttlere

3、fore，becomeahotspotofresearchin廿1em勾0rmilway昀nsportationnations．Themainworkofthisthesisincludes：(1)Mollito血gofwheelwearof的inSoperating0nahi曲一speedmilway．111eresultsindicatethath0110wwearoft11ewheeltl汜adis也emainwearst)rleonnlem础toredhigh-speedVehicles．Allwheelsarewo

4、mtodi丘．erentleVels．Someof也eVehiclesweref孤dtohave、^，heeldenectedwearthatleanstothes扣nesideofmevehicles．(2)T11evehiclesystem咖1锄icmodelofmemonitored仃ainswasbuilt．nedetrimentale丘．ectsofhonow—wearandotherwears够lesonⅡleVehicleeIynamicperfomanceweresimulated．Thes怕te影ofⅥ，h

5、eelr印rofilingwasdisCussed．TheresultsshowmatnegatiVeequiValentconici够oc叫呱on也econditionofwheeldenectedwe鸩whichleadStotheequilibd啪positionofwheelseto趣ets舶m也emiddleof也e仃a咄、他ichinre仙maCceleratesthedenectedweaLThereareseVeral、池ee№ilequilibriumpositionS0nmehollow—wom、Ⅳhee

6、l仃eadprofile．Thus，Ⅱlewhee№ilcontaCtpointjulnps行omoneequilibriumpositiont0锄om％whentheVehicleisrum血Igatahi曲speed，leadingt0a“flangeton锄ge'’Vibration，whichc髓a彘ctmeVehicledynalllicbehaVior．Thepresentofdenectedwearon也ehollow．womwheelsmakes戗leinnuenceofthe“nanget0nange”Vi

7、bration0nt11eVehicledynaIIlicbehaviormorec伽叩1eX．Onmes锄ebogie，ifthewearof觚owheelsetsisdenectedtooneside，nledenectedwearhas伊eaterinfluencetllant11atisdeflected0ndi疵rentsides．TheVehicledyn锄icbehaviorwi也di脑entwheelwears够1eswasanalyzedandadVicesonwheelre-profilingweregi

8、Ven．(3)Anlree—dimensionalWheel．railcontactmodelwasestablishedbasedonthespl硫丘ttedpr01fileofthemeasured臼eadprofile．Itisf孤dmatmereisatwo．poiIItconta