Fracture mechanism and control method of elastic strip of Cologne-egg fastener in the high-prevalence section of rail corrugation

被引：11
|
作者：
Cui, Xiaolu [1 ]
Peng, Shuangqian [1 ]
Yu, Letian [2 ]
Xu, Jia [1 ]
Ding, Haohao [2 ]
Qi, Yayun [1 ]
Hongjuan, Yang [3 ]
机构：
[1] Chongqing Jiaotong Univ, Sch Mechanotron & Vehicle Engn, Chongqing 400074, Peoples R China
[2] Southwest Jiaotong Univ, Chengdu 610031, Peoples R China
[3] Chengdu Univ Technol, Sch Mech & Elect Engn, Chengdu, Peoples R China
来源：
ENGINEERING FAILURE ANALYSIS | 2023年 / 152卷
基金：
中国国家自然科学基金;
关键词：
Rail corrugation; Cologne -egg fastener; Friction coupling vibration; Resonance response; Fatigue failure; SPRING CLIP; BEHAVIOR; CONTACT; GROWTH;
D O I：
10.1016/j.engfailanal.2023.107463
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Rail corrugation is a typical problem on rail surface, and its high-prevalence section is often accompanied by the fracture of fastener elastic strip. The present paper focuses on the fracture mechanism and control method of the Cologne-egg fastener elastic strip in the high-prevalence section of rail corrugation. Firstly, the numerical simulation model of wheel-rail-fastener system considering the key components of Cologne-egg fastener is completely constructed. Then, the fracture mechanism of Cologne-egg fastener is explored by comprehensively considering the resonance response and fatigue failure of the fastener elastic strip. Finally, the corresponding control methods are proposed by the passive control of rail grinding and active adjustment of fastener structure. Analysis results show that the intensified wheel-rail friction coupling vibration in the corrugation zone leads to the resonance response of the Cologne-egg fastener elastic strip, which intensifies the vibration response of elastic strip. Then, the aggravation of vibration response of the Cologne-egg fastener elastic strip leads the fatigue of the elastic strip, and the outer elastic strip is easier to fracture than the inner elastic strip on the low rail of small-radius curve. Controlling the corrugation depth before 0.16 mm or adjusting the elastic modulus of the damping rubber to be 2.20 IV1Pa and 9.40 IV1Pa can increase the service life of Cologne-egg fastener elastic strip.
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页数：14
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