A High Precision Track Element Model and Its Application to Vehicle-Track Coupling System

被引：0
|
作者：
Liu L. [1 ]
Cui W. [1 ]
Qin J. [1 ]
Zuo Z. [1 ]
机构：
[1] State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2023年 / 45卷 / 12期
关键词：
coupling dynamics; distributed support; rail pad; support length; track element;
D O I：
10.3969/j.issn.1001-8360.2023.12.012
中图分类号：
学科分类号：
摘要：
The accurate simulation of track system is of great significance for the study of vehicle-track system dynamics. Based on the finite element theory, a high precision three-layer track element model considering fastener distributed support was proposed, with the derivation of its mass, stiffness and damping matrix. According to the vehicle-track coupling dynamic equation established by using Lagrange equation, an explicit-implicit integration algorithm was proposed for numerical calculation to improve calculation efficiency. Based on the comparison of this model with the traditional fastener centralized supporting track model, the influence of fastener distributed support and support length on the vibration of vehicle-track coupling system was studied. The results show that the fastener centralized supporting track model can overestimate the wheel-rail interaction force and the vertical vibration of wheelset and rail, amplifying the vibration response near the rail pinned-pinned" frequency of the rail. The fastener distributed supporting track model can provide more accurate amplitude results in both time and frequency domains. The wheel-rail interaction and track structure vibration can be reduced by increasing the fastener rubber cushion support length. The vehicle-track coupling model established and the explicit-implicit integration algorithm can give more accurate results while reducing the computational costs. © 2023 Science Press. All rights reserved."
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页码：112 / 122
页数：10
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