地铁车轮踏面制动疲劳强度评价方法及应用  

METHOD TO ASSESS FATIGUE STRENGTH OF TREAD BREKING OF METRO VEHICLE WHEEL AND ITS APPLICATION

作　　者：肖楠[1] 谢基龙[1] 周素霞[1] 

机构地区：[1]北京交通大学结构强度检测国家级认证中心,北京交通大学轨道车辆结构可靠性与运用检测技术教育部工程研究中心,北京100044

出　　处：《工程力学》2010年第9期234-239,共6页Engineering Mechanics

基　　金：国家重点基础研究发展计划“973”项目(2007CB714705);国家自然科学基金项目(50875019)

摘　　要：地铁车轮在运用中受到与车轮转动相关的高频次轮轨载荷和频繁的闸瓦制动热负荷的联合作用,是导致车轮疲劳失效的主要原因。该文采用有限元法模拟了全程实际运营下车轮的制动热应力和轮轨机械应力,并分析了热应力与轮轨机械应力的叠加模式,进而提出了地铁车轮疲劳强度评价的思路和方法。通过实例分析:揭示出了制动和车轮踏面磨耗量对车轮疲劳强度的影响规律。The fatigue failure of metro vehicle wheel results from the high-frequency wheel-rail loads and thermal loads duo to frequent braking during service. The analysis method for mechanical stress and thermal stress of metro vehicle wheel under full service cycle is put forward on the basis of axial symmetry finite element model. And then the superimposition principle of mechanical loads and thermal loads is investigated. Thus, the method to assess the fatigue strength of the metro vehicle wheel is established. Finally, a case study shows the influence of braking and tread wear on the wheel fatigue strength.

关 键 词：疲劳强度 地铁车轮 踏面磨耗 热应力 轮轨机械应力 

分 类 号：U231[交通运输工程—道路与铁道工程]