Failure analysis and optimization of integral droppers used in high speed railway catenary system

被引：20

作者：

Liu, Xi-Yang ^{[1
]}

Peng, Jin-Fang ^{[1
]}

Tan, De-Qiang ^{[1
]}

Xu, Zhi-Biao ^{[1
]}

Liu, Jian-Hua ^{[1
]}

Mo, Ji-Liang ^{[1
]}

Zhu, Min-Hao ^{[1
,2
]}

机构：

[1] Southwest Jiaotong Univ, Tribol Res Inst, Tract Power State Key Lab, Chengdu 610031, Sichuan, Peoples R China

[2] Southwest Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Sichuan, Peoples R China

来源：

ENGINEERING FAILURE ANALYSIS | 2018年 / 91卷

基金：

中国国家自然科学基金;

关键词：

Integral droppers; Failure analysis; Bending fretting; Optimization scheme; Indentation depth; BENDING FRETTING FATIGUE; DAMAGE;

D O I：

10.1016/j.engfailanal.2018.02.003

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this paper, the premature failure of the integral droppers in high speed railway catenary in China was investigated. Series of microscopic characterization and analysis were conducted to identify the root causes of the unexpected failure. By numerically simulating the existing crimping behavior, distribution of the contact stress in the dropper was obtained. It was found that there was stress concentration at the dropper sliced end, which became the primary reason for the permanent distortion and damage on the droppers, and consequently resulted in the untimely final fracture with bending fretting fatigue acting. Through the failure analysis and numerical simulation, a scheme of the improvements in measuring the existing crimping was brought up. Meanwhile, a plan was also put forward to change the current crimping model and reduce the depth of indentation of clamp tube. Static tensile tests and bending fretting fatigue tests were carried out to evaluate the optional plans, which would help extend the service life of integral dropper in practice.

引用

页码：496 / 506

页数：11

共 23 条

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