高速铁路双线路基动应力的特性研究  

Dynamic stress distribution of high-speed railway double-subgrade

作　　者：张石友 孙海建 陈艳国[2] 

机构地区：[1]河南省电力勘测设计院,郑州450007 [2]黄河勘测规划设计有限公司,郑州450003

出　　处：《振动与冲击》2016年第17期165-170,共6页Journal of Vibration and Shock

摘　　要：双线路基是高速铁路路基中常见的一种形式,其动应力的特性研究至关重要。建立了列车-轨道-双线路基三维有限元模型,并在两股钢轨上添加了两种典型的高低不平顺谱。通过数值计算,得到了两种轨道不平顺谱及三种列车运行速度下路基动应力沿纵向的分布,统计了不同深度处路基动应力的均值及变异系数,并给出了均值的拟合公式。最后,对两种轨道不平顺谱下路基动应力的概率分布型式进行了验证。利用柯尔莫哥洛夫检验方法,证明了轨道不平顺谱下路基动应力近似服从对数正态分布。Double-subgrade is one of widely used types of high-speed railway subgrades,to study its dynamic stress is very important. Here,a 3D finite element model of vehicle-track-double-subgrade was bulit using ABAQUS with two typical track irregularity spectra added on the two rails. Through numerical calculation,the dynamic stress distributions of subgrades in longitudinal direction were obtained under two typical track spectra and three train speeds. The mean values and the coefficients of variation（ COVs） of subgrade dynamic stress under different depths of subgrade were statistically obtained,and the fitting formulas were deduced for the mean values. Using Kolmogorov rule,it was verified that the dynamic stress distribution of subgrades in longitudinal direction is approximately a log-normal distribution under track irregularity spectra.

关 键 词：列车-轨道-双线路基有限元模型 轨道不平顺谱 路基动应力 变异系数 对数正态分布 

分 类 号：TU431[建筑科学—岩土工程]