自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
英文版编委
自然科学版 英文版
英文版首届青年编委

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第48卷    第8期    总第276期    2017年8月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2017)08-2142-10
基于轮轨时变接触刚度的车辆-轨道系统垂向振动分析
贺天龙1, 2,陈宪麦1, 2,徐磊3

(1. 中南大学 土木工程学院,湖南 长沙,410075; 2. 高速铁路建造技术国家工程实验室,湖南 长沙,410075; 3. 西南交通大学 牵引动力国家重点实验室,四川 成都,610031)

摘 要: 采用轮轨时变接触刚度代替轮轨非线性接触力的动力效应,模拟轮轨之间的自然接触状态,将有限元理论和能量变分法用于建立车辆-轨道系统垂向统一方程。通过输入脉冲型短波及中、长波不平顺激励,计算系统的动力响应,验证本文模型的正确性,并与国内常用的轮轨密贴模型进行比较分析。研究结果表明:轮轨密贴模型在分析中、长波不平顺激励工况下的系统动力响应是可行的;但在短波不平顺激励工况下,轮轨之间的刚性处理方法将放大短波激励效应,车轮“跳轨”处理方法尚需改进。

 

关键词: 车辆-轨道耦合系统;时变接触刚度;垂向振动;能量变分法;统一方程

Vehicle-track system vertical vibration analysis based on wheel-rail time-varying contact stiffness
HE Tianlong1, 2, CHEN Xianmai1, 2, XU Lei3

1. School of Civil Engineering, Central South University, Changsha 410075, China; 2. National Engineering Laboratory for High Speed Railway Construction, Changsha 410075, China; 3. Track Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China

Abstract:A vertical and unified equation of the vehicle-track system was established with finite element theory and energy variation method, and wheel-rail time-varying contact stiffness replaced wheel-track nonlinear contact force on dynamic effects to simulate the natural contact between wheel and rail. The validity of the model was verified by inputting the long and medium-wave irregularity of track and pulsed shortwave in this model and the dynamic response was calculated. The tight contact model between wheel and rail, which was popular in China was compared and analyzed.The results show that analyzing dynamic response of the vehicle-track system at the tight contact model for the long and medium-wave irregularity of track is feasible. However, the rigid method between wheel and track will amplify the incentive effect of shortwave for the shortwave irregularity of track, the treatment method about jumping rail should be improved.

 

Key words: vehicle-track coupling system; time-varying contact stiffness; vertical vibration; energy variation method; unified equation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号