Effects of fastener elastic cushion deterioration on dynamic characteristics of high-speed train-turnout system

被引：0
|
作者：
Hou M. [1 ,2 ]
Xu J. [1 ,2 ]
Wang P. [1 ,2 ]
Yan Z. [1 ,2 ]
Ma Q. [1 ,2 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] Key Laboratory of High-speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 21期
关键词：
axle box vibration acceleration; dynamic characteristics; fastener elastic cushion deterioration; high-speed turnout; rigid-flexible coupled dynamics;
D O I：
10.13465/j.cnki.jvs.2023.21.012
中图分类号：
学科分类号：
摘要：
With increase in high-speed railway operation time, elastic cushions of fasteners in turnout area deteriorate to have a negative impact on dynamic performance of trains passing through turnout. Here, to study effects of deterioration of fastener elastic cushion on dynamic characteristics of high-speed train-turnout system, considering flexible deformation of rail in turnout area, taking high-speed railway No. 18 ballastless turnout as the study object, a train-turnout rigid-flexible coupled dynamic model was established. Through time-domain and frequency-domain analyses, effects of fastener elastic cushion deterioration position, deterioration degree, deterioration number and train running speed on dynamic characteristics of train-turnout system were studied. The study results showed that deterioration position of fastener elastic cushion has a larger impact, the position of 40 mm wide at top of switch rail is the most unfavorable position for fastener elastic cushion deterioration; with increase in deterioration degree, various dynamic indexes of train-turnout system have an increasing trend, vertical indexes are affected more significantly; increase in deterioration number has a negative impact on lateral dynamic indexes of switch rail tip; when 9 groups of fasteners undergo continuous deterioration, lateral force increases by 21. 3% compared to 1 group of fasteners undergoing elastic cushion deterioration; when train passing through turnout at speed of 250 km/h, effects of fastener elastic cushion deterioration on dynamic characteristics of train-turnout system are the most significant; axle box vibration acceleration is more sensitive to fastener elastic cushion deterioration, it can reflect deterioration of fastener elastic cushion to a certain extent; the study results can provide a certain theoretical guidance for turnout area stiffness optimization and maintenance. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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页码：101 / 109
页数：8
相关论文
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