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Slice semi-decoupling damage numerical simulation method for bearing wear

Published:2023-10-30 author:LI Wenjing, WANG Honghui, LIU Guijie, et al. Browse: 272 Check PDF documents

Slice semi-decoupling damage numerical simulation method for bearing wear

LI Wenjing, WANG Honghui, LIU Guijie, TIAN Xiaojie, LI Yanan

(College of Engineering, Ocean University of China, Qingdao 266000, China)

Abstract: Axle box bearing is the key component of running gear of high-speed electronicl multiple units(EMU), which is often in high-speed or even ultra-high-speed running state, and the wear of its bearing is a very prominent problem. It is of great significance to establish the wear model of bogie bearings, simulate the wear state of rolling bearings under the action of track excitation load factors, and analyze the wear damage of bearings. Aiming at the difficulty in monitoring and analyzing the wear of axle box bearing of the bogie, the wear damage method of axle box bearing was explored based on numerical simulation. The wear damage method of axle box bearing was explored based on numerical simulation. In order to reduce the time cost of finite element model analysis, a sliced semi-decoupled damage analysis method was proposed. Firstly, a three-dimensional model was cut radial and equidistant into a finite number of two-dimensional slices. Secondly,based on arbitrary Lagrangian-Eulerian (ALE) adaptive mesh migration technology and the UMESHMOTION subroutine, the finite element analysis flow of bearing model wear was proposed. Finally, the three-dimensional bearing wear state was reproduced by Gaussian process nonlinear fitting, the wear distribution of bearing inner was obtained,and the efficiency and convergence of the model were compared and analyzed. The results indicate that the calculate efficiency is improved greatly by the two-dimensional slice fitting wear analysis method, and the accuracy of the method is relatively reliable, with an error of less than 10% compared with the traditional method. In addition, the area of bearing inner race with severe wear appears at the edge of area where rollers and the inner race contact, and the degree of wear is lighter in the center of the contact area than that of the edge.

Key words: axle box bearing; rolling bearing; bogie bearing; wear model; wear damage; sliced semi-decoupled; arbitrary Lagrangian-Eulerian(ALE) adaptive mesh migration technology

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