Dynamic solution for vehicle-track interaction considering the elastoplasticity of track slabs

作     者：Xu, Lei Yu, Zhiwu 

作者机构：Cent South Univ Sch Civil Engn Dept Railway Engn 22 Shaoshan Rd Changsha 410083 Peoples R China 

出 版 物：《JOURNAL OF VIBRATION AND CONTROL》 (振动与控制杂志)

年 卷 期：2021年第27卷第13-14期

页      面：1668-1680页

核心收录：

学科分类：07[理学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China [U1934217] 

主　　题：Vehicle-track interaction elastoplastic dynamics Mindlin plate theory iterative algorithm plastic deformation 

摘      要：In this work, an entire multi-rigid-body system with two-stage suspension systems is assumed to run on a slab track system, where the elastoplasticity of the track slab is modeled by Mindlin plate theory considered in a framework of three-dimensional vehicle-track dynamic system. Considering the elastoplasticity of track slabs, the nonlinearity and time- and stress-dependent track slab stiffness matrices must be accounted for in the time-domain dynamic solutions;therefore, a two-step iterative algorithm separating the vehicle-track system into vehicle-rail subsystem and track slab system is developed to solve the dynamic equations of motion for vehicle-track interactions. The numerical studies have shown the accuracy and efficiency of this method in calibrating the vehicle-track dynamic behavior in conditions of track slab elastoplastic deformation. Besides, it has shown that the longitudinal unevenness of the track support stiffness has significant influence on the plasticity of track slabs.