Stochastic Analysis Model for Vehicle-track Coupled Systems under Joint Random Irregularities of Wheel Treads and Track Irregularities

被引：0

作者：

Xu L. ^{[1
,2
]}

Zhai W. ^{[2
]}

机构：

[1] School of Civil Engineering, Central South University, Changsha

[2] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu

来源：

| 1600年 / Science Press卷 / 42期

关键词：

Random vibration; Track random irregularities; Vehicle-track coupled dynamics; Wheel tread wear;

D O I：

10.3969/j.issn.1001-8360.2020.02.011

中图分类号：

学科分类号：

摘要：

The formation and development of the wheel tread wear and track irregularities are random in nature. Based on the probabilistic feature of wheel wear and Gaussian distribution hypothesis, the wheel profiles can be discretized, to establish a probability inversion mechanism for wheel profile points. Meanwhile, a track irregularity probabilistic model was introduced to achieve the ergodic simulation of track random irregularities under different amplitude and frequency states. By combining the vehicle-track coupled dynamics and probability theory, a vehicle-track stochastic dynamic model in which the wheel profile wear and track random irregularities are jointly used as the excitations was developed. Meanwhile, the issues on probabilistic transmission between exciting loadings and system responses were solved by a class of general probability density evolution equation (PDEM). This model can be used to predict the dynamic responses and assess the dynamical reliability for vehicle-track systems. © 2020, Department of Journal of the China Railway Society. All right reserved.

引用

页码：79 / 85

页数：6

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