铁道科学与工程学报2013，Vol.10Issue(3)：1-6,6.
无砟轨道温度梯度荷载对列车-路基上板式无砟轨道系统动力特性的影响
Influence of temperature gradient load of slab on dynamic characteristic of train-slab track on subgrade system
摘要
Abstract
A vehicle-slab track-subgrade three-dimensional finite element coupling dynamic model which can take the nonlinear contact state of different parts of slab track-subgrade system into account was established based on the domestic and foreign research results,and the corresponding program was developed and verified.With the established dynamic model,by using high-speed trains passing slab track on subgrade as example,dynamic characteristics of train-slab track on subgrade system were theoretically studied under temperature gradient load of slab and train load.The calculated results show that temperature gradient load of slab has little influence on dynamic characteristics of wheel/rail vertical force,but it has significant effect on dynamic characteristics of different components of slab track,so the adverse influence of temperature gradientload cannot be ignored when studying the dynamic characteristics of different components of slab track.For Ⅱ-type slab track the influence of temperature gradient load of slab track on dynamic characteristic of train-slab track on subgrade system is greatly related to crack spacing,and the shorter the crack spacing,the smaller the influence of temperature gradient load of slab track.关键词
三维有限元/耦合动力学/板式无砟轨道/温度梯度荷载/高速铁路Key words
three-dimensional finite element method/ coupling dynamic/ slab track/ temperature gradient load / high-speed railway分类
交通工程引用本文复制引用
徐庆元,范浩,李斌..无砟轨道温度梯度荷载对列车-路基上板式无砟轨道系统动力特性的影响[J].铁道科学与工程学报,2013,10(3):1-6,6.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）
