机械工程学报 >

2018 , Vol. 54 >Issue 12: 1 - 7

DOI: https://doi.org/10.3901/JME.2018.12.001

特邀专栏：大国重器：复兴之路上的轨道交通技术

客货混运线路扣件弹条疲劳特性准静态分析

  • 亓伟 ,
  • 刘玉涛 ,
  • 陈江 ,
  • 赵振航 ,
  • 李成辉
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  • 1. 西南交通大学高速铁路线路工程教育部重点实验室 成都 610031;
    2. 中铁第四勘察设计院集团有限公司 武汉 430063;
    3. 昆明铁路局昆明南工务段 昆明 650000
亓伟,男,1989年出生,博士研究生。主要研究方向为道路与铁道工程高速重载轨道工程与维护。E-mail:qw9199@126.com

收稿日期: 2017-07-25

  修回日期: 2018-01-20

  网络出版日期: 2018-06-20

基金资助

国家杰出青年科学基金（51425804）和“高速铁路基础研究联合基金”重点支持（U1334203&U1234201）资助项目。

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Quasi-static Analysis of Fatigue Characteristic of Rail Fastening Clip for Railways with Passenger and Freight Traffic

  • QI Wei ,
  • LIU Yutao ,
  • CHEN Jiang ,
  • ZHAO Zhenhang ,
  • LI Chenghui
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  • 1. MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031;
    2. China Railway Siyuan Survey and Design Group Co. Ltd., Wuhan 430063;
    3. Kunming South Track District, Kunming Railway Bureau, Kunming 650000

Received date: 2017-07-25

  Revised date: 2018-01-20

  Online published: 2018-06-20

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摘要

在客货混运线路中，弹性支承块式无砟轨道的扣件弹条疲劳损伤情况比较严重，为探明原因并制定解决方案，建立包含扣件系统精细化模型的轨道模型，同时确定了扣件疲劳损伤的计算步骤。由于客货混运线路扣件刚度较小，而货车轴重较大，当一个货车转向架通过时，其造成的弹条疲劳损伤度达到5.77×10-7，远高于客车的2.47×10-9。由此得出，货车是造成客货混运线路弹条断裂的主要原因。通过对比分析扣件刚度、橡胶套靴刚度等因素的影响，可知增加扣件刚度可以降低弹条的疲劳损伤度，建议在客货混运线路中，弹性支承块式无砟轨道的扣件刚度提高至80 kN/mm，橡胶套靴刚度降至50 kN/mm。

关键词： 无砟轨道; 弹性支承块; 扣件弹条; 疲劳损伤

本文引用格式

亓伟 , 刘玉涛 , 陈江 , 赵振航 , 李成辉 . 客货混运线路扣件弹条疲劳特性准静态分析[J]. 机械工程学报, 2018 , 54(12) : 1 -7 . DOI: 10.3901/JME.2018.12.001

Abstract

In elastic bearing block track for railways with passenger and freight traffic, the fatigue damage of rail fastening clips is very serious. To find out the reasons and develop solutions, the sophisticated structure model of rail fastening clip is established. Then how to calculate the fatigue damage of rail fastening clip is confirmed. Because of the lower stiffness of the passenger and freight traffic, and the larger freight car axle load, the fatigue damage degree reaches to 5.77×10-7 when a bogie is through, which is more than 2.47×10-9 of passenger train. It follows that the freight car is the main reason why rail fastening clips for passenger and freight traffic are fractured. Compared with the effects of fastener stiffness and rubber coat boot stiffness, it draws the conclusions that the fatigue damage degree is mainly affected by the fastener stiffness. Therefore, it suggests that the fastener stiffness should increase to 80 kN/mm, and the rubber coat boot stiffness should reduce to 50 kN/mm in elastic bearing block track for railways with passenger and freight traffic.

Key words： ballastless track; elastic bearing block; rail fastening clip; fatigue damage

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