Fatigue Life of EMU Axle Considering Harmonic Wear of Wheel

被引：1
|
作者：
Wu D. [1 ]
Ding W. [1 ]
Shang Y. [1 ]
Li H. [2 ]
机构：
[1] School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, Gansu
[2] Product R & D Center, CRRC Tangshan Co., Ltd., Tangshan, 063035, Hebei
来源：
Zhongguo Tiedao Kexue/China Railway Science | 2020年 / 41卷 / 03期
关键词：
Axle; EMU; Fatigue life; Flexible wheel-rail; Harmonic wear of wheel; Time history of load;
D O I：
10.3969/j.issn.1001-4632.2020.03.13
中图分类号：
学科分类号：
摘要：
Taking CRH380BL high-speed EMU as the research object, based on the measured results of wheel harmonic wear, the vehicle-track coupling dynamics models were established under four different wheel-rail relations, namely, rigid wheel-rail, rigid wheel flexible rail, flexible wheel rigid rail and flexible wheel-rail. Through the contrast analysis of the wheel-rail vibration characteristics of the four models, the wheel-rail coupling dynamic model that could best reflect the real situation was obtained. Based on the analysis of axle force, the static strength of axle was calculated by using the finite element software ANSYS. Multi-body dynamics software was used to calculate the time history of axle load considering the harmonic wear of wheel. According to the theory of cumulative fatigue damage, FE-SAFE software was used to analyze the fatigue life of axle considering the harmonic wear of wheel. Results show that the relationship between the flexible wheel and rail can better reflect the real contact state of the wheel and rail. The stress, which is 114.4 MPa, is the largest at the transition point of the inner arc of axle wheel seat. The fatigue life of axle is about 19.2 a considering the harmonic wear of wheel. The harmonic wear of wheel leads to the aggravation of wheel and rail vibration, which has an obvious adverse effect on the fatigue life of axle. © 2020, Editorial Department of China Railway Science. All right reserved.
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页码：111 / 119
页数：8
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