车轮扁疤引起的轮轨冲击分析  

Analysis of Wheel /Rail Impact Induced by Wheel Flats

作　　者：王忆佳[1] 曾京[1] 高浩[1] 罗仁[1] 

机构地区：[1]西南交通大学牵引动力国家实验室,四川成都610031

出　　处：《西南交通大学学报》2014年第4期700-705,共6页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(5100518);国家973计划资助项目(2011CB711100)

摘　　要：为了研究高速列车车轮扁疤引起的动力学问题,根据多体动力学理论和等效轨道激扰法,建立了我国某型高速车辆的动力学模型及车轮新、旧两种扁疤模型.应用车轮轮径变化扁疤模拟法对车轮扁疤进行模拟,并对高速车辆轮轨冲击动力效应进行仿真分析.结果表明:新、旧扁疤轮轨冲击力规律不同,旧扁疤产生轮轨垂向冲击力随车速的增大而增大,在高速运行条件下,远大于新扁疤产生的垂向冲击力;当车速分别高于200和250 km/h时,车轮扁疤长度需要限制在35和30 mm以内.In order to study the dynamic issues induced by wheel flats for high speed trains,a dynamic model and new/worn wheel flat models were developed using the multi-body theory and the equivalent track excitation method. The simulation method considering the change of wheel radius was applied to simulate the wheel flat and analyze the wheel/rail impact caused by wheel flats. The results show that the behaviors of wheel-rail impact forces caused by new and worn wheel flats are different：the impact force caused by a worn flat increases with the train speed increasing,and is significantly larger than that by a new flat at high speeds. When the running speed of the train is larger than 200 and 250 km/h,the length of the wheel flat should be limited within 35 and 30 mm,respectively.

关 键 词：车轮扁疤 轮轨冲击 扁疤限值 

分 类 号：U271.91[机械工程—车辆工程]