铁路车辆磨耗型车轮的三维热接触耦合分析  

A Coupled Thermal-Contact Analysis on Worn Tread Wheels of Vehicles

作　　者：张军[1] 曹思洋[1] 张剑[1] 孙传喜[1] 

机构地区：[1]大连交通大学交通运输工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2009年第6期1-5,14,共6页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(50605003;50875218);牵引动力国家重点实验室开放课题;铁道部科学计划资助项目(2008J001);辽宁省百千万人才工程资助项目(02008921037)

摘　　要：建立了铁路车辆磨耗型踏面LM、LMA、XP55、S1002四种车轮与60 kg/m钢轨热接触耦合的三维有限元模型,利用大型有限元分析软件MSC.Marc分析了在不同载荷工况下,车轮与钢轨抱闸滑行时的应力场和温度场的分布规律和变化规律,分析了温度场对应力场的影响,并分别得出了在弹性模量、热导率、比热容、线膨胀系数等材料属性随温度变化的情况下,与相应参数恒定时的应力场与温度场分布,分析了各参数对计算结果的影响.结果表明,线膨胀系数与比热容对耦合分析结果的影响最大,弹性模量次之,热导率的影响最小.Three-dimension finite element models including four types of worn tread wheels LM,LMA,XP55,S1002 and 60 kg/m rail were established to analyze stress and heat generated by friction.The distribution and variational regulation of the stress and temperature field under different loadcases were analyzed based on finite element software MSC.Marc.The effect between temperature and stress was analyzed with the consideration of material properties including Young＇s modulus,heat conductivity,specific heat,thermal expansion coefficient varing with temperature.The stress and temperature results based on the properties above were compared with the results based on the properties invariable.The comparison shows that the thermal expansion coefficient and specific heat have a great effect on the coupled analysis,while Young′s modulus has a weaker effect,and the heat conductivity is the weakest.

关 键 词：磨耗型踏面 热接触耦合 材料非线性 

分 类 号：U270.33[机械工程—车辆工程]