不同轨下基础轨道连接的动力特性分析  

Research on dynamic performance of train and track at the junction of two different kinds of track structures

作　　者：蔡成标[1] 翟婉明[1] 王其昌[1] 

机构地区：[1]西南交通大学列车与线路研究所,四川成都610031

出　　处：《铁道学报》2002年第2期79-82,共4页Journal of the China Railway Society

基　　金：国家杰出青年科学基金项目 (5952 551 1 );教育部"高等学校骨干教师资助计划项目";牵引动力国家重点实验室开放课题基金项目 (2 0 0 0 0 7)

摘　　要：建立两类不同轨下基础轨道连接的动力特性分析计算模型 ,确定了动力学性能评价指标 ,分析由轨下基础沉降差引起的钢轨初始变形以及行车方向、行车速度和轨道刚度变化对轮轨系统动力性能的影响 ,提出确定轨道过渡段长度的方法。Two kinds of mechanical models to analyze the dynamic performance of train and track at the junction of two different types of sub rail foundations had been established and the reasonable criterions were put forward too. Based on this, the initial deformation of rails due to differential settlement of two kinds of tracks, the effects of the train moving direction, train speed and the changes in track stiffness on the dynamic performance of wheel/track system were studied. Finally, the method to determinate the length of track transition section between different structures was suggested.

关 键 词：轨下基础 沉降差 刚度变化 动力特性 过渡段 

分 类 号：U213.2[交通运输工程—道路与铁道工程]