Influence of Wheel-Rail Contact Relationship on Wear and Fatigue Defects of Rail in Small Radius Curve for Freight Railway

被引：0

作者：

Yang G. ^{[1
]}

Liu F. ^{[1
]}

Li C. ^{[1
]}

Zhang Y. ^{[1
]}

Zhou S. ^{[1
]}

Liang X. ^{[1
]}

机构：

[1] Metals and Chemistry Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing

来源：

Zhongguo Tiedao Kexue/China Railway Science | 2023年 / 44卷 / 04期

关键词：

Fatigue index; Freight railway; Rail in small radius curve; Wear rate; Wheel[!sup]-[!/sup]rail contact;

D O I：

10.3969/j.issn.1001-4632.2023.04.18

中图分类号：

学科分类号：

摘要：

Aiming at the wear and fatigue damage of rail in small radius curve for freight railway, the evolution laws of rail profile and surface state in small radius curve were obtained through long-term tracking test. Based on measured wheel-rail parameters, a coupling dynamics model of freight vehicle-curve track system was established. By means of dynamic simulation, the variation laws of wheel-rail contact relationship of small radius curved rail in different wear stages were studied, as well as the influence of wheel-rail creep on rail wear and contact fatigue damage. The reasonable lubrication time of rail in small radius curve was analyzed. The results show that, the high rail in small radius curve is mainly subjected to vertical wear in the early stage of service, and the side wear in the later stage. The low rail is mainly subject to vertical wear, and the vertical wear rate is basically equivalent to that of the high rail. As the rail wear increases, the lateral displacement of wheelset, the range of wheel-rail contact, and the width of the rail light band gradually increase. The wheel-rail creep of the working side of the high rail in curve also increases with the wear in dominant position, which is less likely to occur contact fatigue damage. And the surface damage degree of the low rail in curve is continuously reduced. The lubrication should be implemented after the occurrence of the side wear in high rail, which can reduce not only the rate of side wear, but also the probability of contact fatigue damage. © 2023 Chinese Academy of Railway Sciences. All rights reserved.

引用

页码：187 / 194

页数：7

共 16 条

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