考虑车轮不圆的轮轨法向接触问题研究  

Research on the Normal Wheel-Rail Contact with Consideration of Out-of-Round Wheels

作　　者：李晓峰[1] 曾京[1] 罗仁[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《铁道车辆》2014年第1期1-4,6,共4页Rolling Stock

基　　金：国家自然科学基金(51005189);国家科技支撑计划(2009BAG12A01)

摘　　要：建立了描述车轮不圆的轮轨三维模型,并假设切向接触对法向接触不产生影响,采用非赫兹接触理论探讨了车轮不圆对轮轨法向接触的影响。分析了正常情况下车轮横移量对轮轨法向接触的影响,并研究了车轮二阶不圆且滚动1/3周的轮轨法向接触变化特性。计算结果表明,接触斑外形可能有多种形状;车轮不圆会引起较大的接触应力。The 3-dimensional wheel-rail model describing out-of-round wheels is established.The tangent contact is supposed to have no effect on the normal contact,and the non-hertz contact theory is used to discuss the effect of out-of-round wheels on normal wheel-rail contact.The effect of lateral displacement of wheel on normal wheel-rail contact under ordinary conditions is analyzed.The changing features of the normal wheel-rail contact with second-order out-ofround wheels and 1/3circle rolling are researched. The calculation result shows that there may be several shapes of the contact spot,and the out-of-round wheels can cause fairly big contact stress.

关 键 词：车轮不圆 法向接触 非赫兹接触应力 

分 类 号：U270.331.1[机械工程—车辆工程]