Research on the failure mechanism of elastic strip fracture in corrugated sections of metros

被引：27
作者：
Cui, Xiaolu [1 ,2 ,3 ]
Bao, Pengyu [1 ]
Li, Tong [1 ]
Qi, Wei [3 ]
机构：
[1] Chongqing Jiaotong Univ, Sch Mechanotron & Vehicle Engn, Chongqing 400074, Peoples R China
[2] State Key Lab Performance Monitoring & Protecting, Nanchang 330013, Jiangxi, Peoples R China
[3] Chongqing Rail Transit Grp Co Ltd, Chongqing 401120, Peoples R China
来源：
ENGINEERING FAILURE ANALYSIS | 2023年 / 143卷
基金：
中国国家自然科学基金;
关键词：
Rail corrugation; Frictional coupling vibration; Fastener clip; Resonance response; Fatigue failure analysis; RAIL CORRUGATION; SPRING CLIP; PERFORMANCE;
D O I：
10.1016/j.engfailanal.2022.106837
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Rail corrugation is a common problem of railway, where the failure of the fastener clip in the corrugated section is serious. According to field investigations, a complete finite element model of the wheelset-rail-fastener system and an irregularity surface of corrugated wear are constructed. Then, the failure mechanism of elastic strip fracture in the corrugated section is studied from the perspectives of the resonance response and the fatigue failure, respectively. Finally, the relevant treatment measure is proposed through the grinding treatment of rail corrugation. Results show that the frictional coupling vibration of the wheelset-rail-fastener system in the corrugated section may lead to the resonance and the failure of fastener clips. Besides, the vibration of the entire system is intensified by the corrugated wear, which reduces fatigue lives of fastener clips. Moreover, the fracture of elastic strips can be restrained by controlling the corrugated depth below 0.078 mm.
引用
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页数：12
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