Study on wind-induced wear characteristics of railway catenary bushing ear

被引：0

作者：

Zhou W. ^{[1
,2
]}

Kang J. ^{[1
,2
]}

Fang C. ^{[1
,2
]}

Chen J. ^{[3
]}

Zhang Q. ^{[1
,2
]}

Xiao H. ^{[1
,2
]}

Wang Z. ^{[1
,2
]}

机构：

[1] School of Traffic & Transportation Engineering, Central South University, Changsha

[2] Key Laboratory of Traffic Safety on Track, Ministry of Education, Joint International Research Laboratory of Key Technology for Rail Traffic Safety, National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Central South Uni

[3] Technology and Information Department of China Railway Urumqi Bureau Group Co., Ltd., Urumqi

来源：

Journal of Railway Science and Engineering | 2023年 / 20卷 / 04期

关键词：

bushing ear; pre-tension attenuation; railway catenary; wear characteristic; wind load;

D O I：

10.19713/j.cnki.43-1423/u.T20220844

中图分类号：

学科分类号：

摘要：

Wind-induced vibration of railway catenary cause accelerated component wear and rising maintenance cost. Further, the component wear develops into fracture and failure in severe cases, which is harmful to train operation safety. To treat with wind-induced wear problem of railway catenary components, bushing ears, one of the most frequent wearing parts, were investigated to study its wear feature under the practical wind loads. First, the wind load identification and node force reconstruction were created via wind-induced catenary attitude decoupling. Wind load calculation formula and nodal force transfer coefficient were obtained through finite simulation. Time-history of suspension wind loads and bushing ear node forces were given based on the detected wind deviation of catenary suspension on Xinjiang railway line in wind area. Second, a three-dimensional finite element model of the contact between bushing ear and wrist arm was established. Considering bolt pre-tension attenuation due to wear clearance expansion between ears, the wear prediction model was constructed based on Archard wear theory. With the nodal force time-history at bushing ear and the dynamic bolt pretension, the contact wear propagation was analyzed between bushing ear and cantilever beam under winds. Results indicate that a big wear ratio occurs at the initial wear period because of high contact stress. However, the wear decelerates as the bolt pre-tension weakens due to the expansion of wear clearance. The wear depth follows a gradual increasing from two sides to the middle, where the deeper wear locates closer to the linking joint. The accumulative wear depth and bolt pre-tension attenuation reaches to 0.52 mm per year and 20.55% separately, when the maximum wear occurs at the bushing ear on top of positioning tube. The research outcome in bushing ear wear feature can provide a scientific support for operation and maintenance of railway catenary components in wind area. © 2023, Central South University Press. All rights reserved.

引用

页码：1487 / 1499

页数：12

共 21 条

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