路基本体材料参数敏感性分析

Sensitivity Analysis of Road Element Material Parameters

为研究影响铁路轨道-路基结构动力特性的因素,文中通过有限元仿真分析,建立三维模型,研究路基本体材料不同的阻尼比、泊松比、弹性模量、黏聚力和内摩擦角参数下轨道-路基动力特性,对比分析各参数对轨道-路基动力特性影响程度。结果表明:各结构层动力特性对路基本体材料参数的敏感性依次为弹性模量、凝聚力和内摩擦角、泊松比、阻尼比。

In order to study the factors affecting the dynamic characteristics of track-subgrade structure,a three-dimensional model is established through the finite element simulation analysis,and the influence degree of different damping ratio,Poisson ratio,elastic modulus,cohesion and internal friction angle parameters of the road base material are compared and analyzed.The results show that the sensitivity of the dynamic characteristics of each structural layer to the material parameters of the road base is in descending order of elastic modulus,cohesion and internal friction angle,Poisson's ratio,and damping ratio.