文档介绍：华中科技大学
硕士学位论文
考虑徐变影响的铁路桥梁车线桥耦合振动分
姓名:王涛
申请学位级别:硕士
专业:桥梁与隧道工程
指导教师:陈志军
2011-02-26
摘要
我国高速铁路在近十几年发展迅猛,给国家和人民带来巨大效益。在这种背景
下,研究高速铁路桥梁车线桥耦合振动,保证列车运营过程中的安全性和舒适性以
及桥梁寿命期的安全性就显得非常有意义。高速列车通过桥梁时通过轮轨接触关系
将引起桥梁结构的振动,而桥梁结构的振动反过来又影响车辆的振动,这种结构间
相互作用、相互影响就是车辆、轨道与桥梁之间的振动耦合。虽然目前有许多车线
桥耦合振动的理论方法,但是大多数侧重于求解车辆系统的动力响应且计算复杂,
耗时耗力。本文在总结和吸收前人研究成果的基础上,利用有限元方法并结合虚功
原理,推导出了基于欧拉-伯努利梁的车线桥系统大单元,应用 MATLAB 语言,编
制了车线桥耦合振动程序,并对铁路中常用的 24m 简支梁进行了桥梁动力响应分
析。取得的主要成果如下:
1、本文将车-线-桥的单元自由度融合到一起,构建出一种新的共同作用单元,
并通过理论推导得到了该单元的动力学方程和相关动力矩阵,运用 MATLAB 编制
了高速铁路桥梁动力分析程序。
2、采用上述方法对铁路常用 24m 简支梁桥进行分析,讨论了在不同车速以及
考虑徐变与否情况下桥梁系统的动力响应。分析结果表明,列车速度和桥梁动力响
应之间关系不明显,小跨径简支梁桥的徐变对桥梁动力响应的影响不大。
本文研究了小跨径桥梁考虑徐变与否的桥梁动力响应,今后可对大跨径桥梁的
动力响应做进一步研究。

关键词:高速铁路桥梁车-线-桥共同作用单元徐变车辆-轨道-桥梁耦合

I
Abstract
In recent decades,high-speed railway in china is developing rapidly,bring huge
benefits to our on this background,research the coupling vibration between
the vehicle, rail and bridge,ensure the safty fort of the train and security of the
bridge is very meaningful. High-speed train passing through the bridge will cause the
vibration of the bridge structure through the contact between wheel and rail, and vibration
of the bridge structure affects the vibration of the vehicle in turn. This interaction and
influence is the coupling vibration between the vehicle, rail and bridge. Although there are
many theoretical methods about vehicle - rail - bridge coupling vibration, most of those
focus on the dynamic response of vehicle systems. That plex caculation and
time-consuming. This thesis summarize and absorb the results of previous studies, deduce
a new element which is based on euler-bernoulli beam with finite element method and
principle of virtual work,make a vehicle - rail - bridge coupling vibration program with the
MATLAB language, analyze the vehicle - rail - bridge coupling dynamics problem of 24m
railway bridge. The main achievements of this thesis are as follows: