Identification of switch rail brakeage in high speed railway turnout based on elastic wave propagation

被引：1
|
作者：
Wang P. [1 ,2 ]
Liu L. [1 ,2 ]
Hu C.-Y. [1 ,2 ]
Gong Z. [1 ,2 ]
Xu J.-M. [1 ,2 ]
Wang Z.-X. [3 ]
机构：
[1] Key Laboratory of High-speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu
[2] College of Civil Engineering, Southwest Jiaotong University, Chengdu
[3] CRSC Research and Design Institute Group Limited Company, Beijing
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2020年 / 54卷 / 10期
关键词：
Broken rail detection; Elastic wave propagation; High-speed turnout; Switch rail fracture; Time-frequency analysis;
D O I：
10.3785/j.issn.1008-973X.2020.10.022
中图分类号：
学科分类号：
摘要：
The identification of high-speed switch rail break based on elastic wave propagation was analyzed aiming at the monitoring problem of high-speed switch rail break. The explicit finite element method was used to establish an analytical model for the elastic wave propagation characteristics of high-speed turnouts, in which the constraints such as switch closure and the support of the sliding bed platform were considered. The model was verified by experiment. The effects of different excitation frequency, fracture position of switch rail and the close-contact state on the elastic wave propagation characteristics of the high-speed turnout were analyzed. Results showed that the elastic wave energy of 2 kHz and 4 kHz was concentrated in the healthy rail, and the signal propagation was basically not affected by the constraints of stock rail and slide bed platen. In the process of broken rail identification, the signal transmitted by slide bed platen attenuated to above 109, and the signal transmitted by switch closure had significant influence of elastic waves of various frequencies. Broken rail position was related to the signal of elastic wave propagation under close contact. Copyright ©2020 Journal of Zhejiang University (Engineering Science). All rights reserved.
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页码：2038 / 2046
页数：8
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