Influence and detection method of steel spring failure of floating slab track based on vibration response

被引：0
|
作者：
Ren J. [1 ,2 ,3 ]
Xu X. [1 ,2 ]
Zhang K. [1 ,2 ]
Zhang S. [1 ,2 ]
Wei Z. [4 ]
机构：
[1] MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu
[2] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[3] School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha
[4] China Railway Design Group Co. Ltd., Tianjin
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 06期
基金：
中国国家自然科学基金;
关键词：
detection index; failure of steel spring vibration isolator; floating slab track; singular value entropy; vibration transmissibility;
D O I：
10.11817/j.issn.1672-7207.2023.06.028
中图分类号：
学科分类号：
摘要：
The study is to study the influence of steel spring failure on the dynamic performance of assembled floating slab track and effectively detect the service of steel spring in the operation of the line. Based on the steel spring floating slab track structure of a line of Shenzhen Metro, a finite element model of vertical coupling dynamics of vehicle-floating slab track with steel spring failure was established by using ABAQUS software. The influence of single and combined steel spring failure on the dynamic performance of floating slab track was explored. A steel spring failure detection method based on vibration transmissibility function and singular value entropy theory was proposed. The results show that the vertical acceleration of the vehicle is less sensitive to the failure of single or multiple steel springs. Compared with the span center, the failure of a single steel spring at the end of the floating slab has a greater impact on the vibration response of the track structure. When multiple steel springs fail, the maximum vertical displacement of rail and floating slab is significantly larger than that of single steel spring failure, and all of them exceed the relevant limit, which has a great influence on the stability of floating slab track structure. After the failure of the steel spring, the maximum and average values of the vibration transmissibility between the detection points decrease compared with those before the failure, and the singular value entropy before and after the failure also changes significantly. By extracting the vertical acceleration response of each measuring point, the detection method combined with the maximum value, mean value and singular value entropy index of the vibration transmissibility function can better reflect the failure of the steel spring. The study can provide theoretical guidance for the engineering application of steel spring damage detection in the future. © 2023 Central South University of Technology. All rights reserved.
引用
收藏
页码：2407 / 2418
页数：11
相关论文
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