不同磨耗状态钢轨中弹性波传播特性研究

doi:10.3901/JME.2021.18.015

机械工程学报 ›› 2021, Vol. 57 ›› Issue (18): 15-22.doi: 10.3901/JME.2021.18.015

• 特邀专栏：高速铁路钢轨检测监测与应用 • 上一篇下一篇

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不同磨耗状态钢轨中弹性波传播特性研究

陈嵘^1,2, 江文强^1,2, 李浩然^1,2, 徐井芒^1,2, 胡辰阳^1,2, 田雨虹³

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. 西南交通大学土木工程学院成都 610031;
3. 成都怡建工程咨询代理有限公司成都 610074

收稿日期:2021-01-06 修回日期:2021-06-05 出版日期:2021-09-20 发布日期:2021-11-30
通讯作者: 徐井芒(通信作者),男,1987年出生,博士,副教授,硕士研究生导师。主要研究方向为高速道岔伤损监测,高速重载铁路轨道结构及轨道动力学。E-mail:jingmang87@home.swjtu.edu.cn
作者简介:陈嵘,男,1981年出生,博士研究生导师。主要研究方向为铁路轨道无损检测、高速重载铁路轨道结构及轨道动力学。E-mail:chenrong@home.swjtu.edu.cn
基金资助:
国家自然科学基金（51978586，51778542，U1734207）和四川省科技支撑计划重点研发（2019YFG0283）资助项目。

Investigation on Propagation Characteristics of Elastic Wave in Different Wear Rail

CHEN Rong^1,2, JIANG Wenqiang^1,2, LI Haoran^1,2, XU Jingmang^1,2, HU Chenyang^1,2, TIAN Yuhong³

1. Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031;
2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031;
3. Chengdu Yijian Engineering Consulting Agency Co., Ltd., Chengdu 610074

Received:2021-01-06 Revised:2021-06-05 Online:2021-09-20 Published:2021-11-30

摘要/Abstract

摘要： 区间线路钢轨若发生磨耗将会对弹性波传播产生影响，继而影响弹性波对伤损的识别。采用现场试验，验证半解析有限元方法的正确性；基于该理论方法，对五种不同垂直磨耗量的钢轨求解得到频散曲线，结合波结构对比分析了磨耗后钢轨的频散特性；以群速度变化为指标分析了对垂直磨耗敏感和不敏感的波结构特征，并仿真进行验证。研究表明：在不同垂直磨耗条件下，同一频率附近发生频散曲线相交或偏转的频率随着垂直磨耗量增大而增大，而曲线相交或偏转处的相速度随着垂直磨耗量增大而减小；非敏感波模式主要通过轨腰和轨底传播，而敏感波模式主要通过轨头或全断面传播；轨头垂向振动波模式对钢轨垂直磨耗敏感，选择该波模式进行钢轨缺陷检测需要考虑钢轨磨耗的影响。

关键词: 磨耗钢轨, 弹性波, 半解析有限元, 频散特性, 波结构

Abstract: If the rail wear occurs in the main line, which can affect the elastic wave propagation and further influence the elastic wave identification of the damage. The semi-analytical finite element method is verified by field tests. Based on the theoretical method, the dispersion curves of five types rails with different vertical wear rates are obtained, and the dispersion characteristics of the rails after wear are compared with the wave structures. The wave structure characteristics that are sensitive and insensitive to vertical wear are analyzed based on the variation of group velocity, and verified by simulation. The results show that the frequency of intersecting or deflection of dispersion curves near the same frequency increases with the increase of vertical wear under different vertical wear conditions, while the phase velocity at the intersecting or deflection of the curves is opposite. The insensitive wave mode propagates mainly through the rail waist and the rail bottom, while the sensitive wave mode propagates mainly through the rail head or the full section. The simulation results show that the vertical vibration wave mode of rail head is sensitive to rail vertical wear, and the influence of rail wear should be considered when selecting this wave mode to detect rail defects.

Key words: worn rail, elastic wave, semi-analytical finite element method, dispersion characteristics, wave structures

中图分类号:

TH17

陈嵘, 江文强, 李浩然, 徐井芒, 胡辰阳, 田雨虹. 不同磨耗状态钢轨中弹性波传播特性研究[J]. 机械工程学报, 2021, 57(18): 15-22.

CHEN Rong, JIANG Wenqiang, LI Haoran, XU Jingmang, HU Chenyang, TIAN Yuhong. Investigation on Propagation Characteristics of Elastic Wave in Different Wear Rail[J]. Journal of Mechanical Engineering, 2021, 57(18): 15-22.

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不同磨耗状态钢轨中弹性波传播特性研究

Investigation on Propagation Characteristics of Elastic Wave in Different Wear Rail

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