Page 110 - 《摩擦学学报》2020年第4期

第 40 卷 第 4 期 摩 擦 学 学 报 Vol 40 No 4
2020 年 7 月 Tribology Jul, 2020

DOI: 10.16078/j.tribology.2019186

铁路车轴过盈配合面微动损伤分析

及有限元仿真

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袁才钦 , 李亚波 , 杨 凯 , 鲁连涛 , 邹 朗 , 李 伟 , 曾东方 1*
(1. 西南交通大学 牵引动力国家重点实验室，四川 成都 610031;
2. 中车青岛四方机车车辆股份有限公司 工程实验室，山东 青岛 266111)
摘 要: 基于全尺寸铁路车轴疲劳试验，观察并分析了微动区损伤形貌及损伤机理. 基于测量的磨损轮廓建立有限
元模型，计算分析了微动磨损对过盈配合面微动参量及轴向应力的影响. 结果表明：轮座近加载侧存在1个宽度约为
20 mm的微动损伤区，根据形貌特征可以分为3个区域. 仿真得到的微动滑移区宽度与损伤区宽度基本一致，张开区
宽度略小于磨损区. 未磨损时，接触压应力、摩擦剪应力及轴向应力峰值均出现在接触最边缘；在微动磨损作用下，
接触压应力、摩擦剪应力、轴向应力峰值出现在磨损-未磨损边界，且轴向应力数值在磨损区由负变正. 磨屑的存在
为接触面提供承载平台，在一定程度上抑制应力集中向内部转移.
关键词: 铁路车轴; 有限元; 微动磨损; 微动参量; 损伤分析
中图分类号: TH117.3 文献标志码: A 文章编号: 1004-0595(2020)04–0520–11

Damage Analysis and Finite Element Simulation of Fretting
Wear on Press-Fitted Surface of Railway Axle

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YUAN Caiqin , LI Yabo , YANG Kai , LU Liantao , ZOU Lang , LI Wei , ZENG Dongfang

(1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Sichuan Chengdu 610031, China
2. CRRC Qingdao Sifang Co, Ltd Engineering Laboratory, Shandong Qingdao 266111, China)
Abstract: The fatigue test was conducted for the full-scale railway axle, and the fretting damage on the press-fitted
surface was analyzed. The finite element model was then established to investigate the influence of fretting wear on the
fretting parameters and axial stress. The results show that the total width of the fretting damage area was about 20 mm.
According to the characteristics of surface appearance, it can be divided into three areas. The width of the damage zone
was almost the same as the width of the fretting zone, and the width of the opening zone was slightly smaller than that of
the wear zone. The peak values of the contact pressure, the frictional shear stress and the axial stress appeared at the
contact edge for the axle without wear. With the occurrence of fretting wear, the peak values of the contact pressure,
axial stress and frictional shear stress appeared at the worn-unworn boundary. At the same time, the value of the axial
stress changed from negative to positive in the wear zone. The wear debris provided a bearing platform for the contact
surface and inhibits the stress concentration moving from the external to the inside of fretting area.
Key words: railway axle; finite element; fretting wear; fretting parameter; damage analysis

Received 15 October 2019, revised 19 February 2020, accepted 28 February 2020, available online 28 July 2020.
*Corresponding author. E-mail: zengdongfang@swjtu.edu.cn, Tel: +86-18628188937.
This work was supported by the Independent Research Project of State Key Laboratory of Traction Power (2018TPL_Z01), the
National Natural Science Foundation of China (51375406) and the Fundamental Research Funds for the Central Universities
(2682018CX68).
牵引动力国家重点实验室自主项目(2018TPL_Z01)，国家自然科学基金项目(51375406)和中央高校基本科研业务费(2682018CX68)
资助.