Effect of Fastener Failure of High-speed Railway on Dynamic Response of Vehicle-track Coupling System

被引：0
|
作者：
Sun X. [1 ,2 ]
Wang P. [1 ,2 ]
机构：
[1] Key Laboratory of High-speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu
[2] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2022年 / 44卷 / 08期
关键词：
Coupling dynamics; Failure; Fastener system; Flexible track; Frequency-dependent;
D O I：
10.3969/j.issn.1001-8360.2022.08.012
中图分类号：
学科分类号：
摘要：
A dynamic model of W300-1 fastener system with dynamic frequency-dependent characteristics of the railpad and nonlinear elasticity of spring clip was proposed, considering the preload of the spring clip of the fastener system and the viscoelastic properties of the railpad. The vehicle-flexible track coupling dynamic model was established using SIMPACK, to evaluate in succession from zero to five fasteners the effects of the two failure modes including the spring clip failure and fastener system failure on the safety and stability of the vehicle as well as the vechicle-track interaction. The results show that each evaluation index increases as the number of fastener failures increases. The maximum rate of wheel load reduction exceeds the limit of current code when five fastener systems fail, but does not endanger the safety of the vehicle, while the operating stability of the vehicle is less affected by the number of fastener failures. The failure of the fastener system has a greater impact on the rail, and the vertical displacement of the rail the failure of 3 to 5 fastener systems exceeds the limit. Fastener failure usually causes greater preload of the normal fastener and greater acceleration of the rail near the failure areas than those at the other positions, which exacerbates the damage to the adjacent fastener system. © 2022, Department of Journal of the China Railway Society. All right reserved.
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页码：108 / 116
页数：8
相关论文
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