摩擦系数对薄轮缘车轮通过曲线段磨耗的影响

打开文本图片集

中图分类号：U211.5 文献标志码：A 文章编号：2095-2945（2025）21-0019-06

Abstract：Thin-rimwhelshavebecomethemain formoftrainwheels.Inorder toreduceitswearoncurvedsections，the efectofcurvedraillubricationonwhelwearwasstudied.Byestablishingavehicle-trackcoupleddynamicmodel，thwear lawsof wornwhelsunderdiferentcurveradiiandtrackbottomslopesareanalyzedwhen thewhee-railfrictioncoefficentsare changed.Theresultsshowthatthewhee-railcontactperformancedecreasesafterwearing，andthecontactcharacteristicsarethe worstwhenmatchingthewornwhel-newtrack，butthemaximumvaluesofderalmentcoeffcientandwheelweightreduction rate decrease by 57.9%and 9.4% respectively，indicating that trains with thin rims are more difficult to derail when crossing curves.Reducingthewhee-railfrictioncoeffientcanefectivelyreduceweelwear，andthesmallrthecurveradius，themore obvioustheefect，whiletherailbotomslopehaslessinfluenceonthewearindexAsymmetriclubricationcontrolofinnerand outerrailsismoreconducivetofrictionreduction.Whenthefrictioncoeficientoftheinnerrailisfixed，thewearindexofthe inerandouterwheelsdecreasesasthefrictioncoefcientoftheouterraildecreases，andthefrictionreductionrateoftheouter wheelsisfaster.Whenthewheel-railfrictioncoeficientdropstoO.1，thewheelfatiguefactorislessthanO，andsurfacfatigue isnoteasytoocur.Basedonthesimulationresults，measuressuchasasymmetricfrictioncontrolorreducingthewhel-rail frictioncoeffcienttoO.1arerecommendedtoreducerimwearandextendwheelfe，providingtheoreticalreferenceandbasis for improving economy.

Keywords：rimwear;whee-rail matching；whel-rail lubrication；wear index；fatigue factor;wear-reducingmeasures

车轮轮缘异常磨耗是高速列车运行中的常见问题，影响轮轨接触特性及运行安全性和稳定性。（剩余6611字）