铁道科学与工程学报2012，Vol.9Issue(3)：13-19,7.
路基不均匀沉降对列车-路基上无砟轨道耦合系统动力特性的影响
Influence of uneven settlement of subgrade on dynamic characteristic of train-ballastless track on subgrade coupling system
摘要
Abstract
A three - dimensional finite element coupling dynamic model of vehicle - slab track on subgrade which can take the nonlinear contact state of different parts of slab track - subgrade system into account was established based on vehicle - track coupling dynamic theory, and corresponding program was developed and verified. With the established dynamic model, and taking the high - speed trains passing ballastless track on subgrade as example, dynamic characteristics of train - ballastless track on subgrade system was theoretically studied under uneven settlement of subgrade. The results show that: (1) Uneven settlement of subgrade has great influence on dynamic characteristics of carbody, and influence of uneven settlement of subgrade on dynamic characteristics of carbody has little relation with types of ballastless track. (2) Uneven settlement load of subgrade has some influence on dynamic characteristics of components of ballastless track, but the influence is less than that of carbody, and influence of uneven settlement of subgrade on dynamic characteristics of components of ballastless track has some relation with types of ballastless track. In general, influence of uneven settlement of subgrade on dynamic characteristics of components of I - type ballastless slab track is greater than that of II - type ballastless slab track and double - block ballastless track.关键词
三维非线性有限元/耦合动力学/路基上无砟轨道/不均匀沉降/高速铁路Key words
three - dimensional nonlinear finite element method/ coupling dynamic/ ballastless track on subgrade / uneven settlement/ high - speed railway分类
交通工程引用本文复制引用
徐庆元,李斌,范浩..路基不均匀沉降对列车-路基上无砟轨道耦合系统动力特性的影响[J].铁道科学与工程学报,2012,9(3):13-19,7.基金项目
国家自然科学基金资助项目(51178469) （51178469）
铁道部科技开发计划项目(2008G031-17-1) （2008G031-17-1）
