Generation and Evolution Conditions of Polygonal Wear of High-Speed Wheel

Yahong Dong,Shuqian Cao,Jiaqiang E

doi:10.1155/2021/6793351

Yahong Dong, Shuqian Cao + Show 1 more

Open Access

https://doi.org/10.1155/2021/6793351

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Abstract

Wheel polygonal wear has long been a problem that confused the safety of railway operation which has important theoretical value and research significance. In this paper, the conditions of polygonal wear of high-speed wheel are analyzed based on the wear model and verified by the field measured data. Considering the wheel track interaction caused by rotation, a finite element model of wheelset rotor dynamics is established. The effects of rotor speed, mass eccentricity, wheelset, and track flexibility on the vibration characteristics of wheelset rotor system and wheel polygonal wear characteristics are analyzed by beam element and solid element, respectively. The results show that the wheel longitudinal vibration is the main reason of wheel polygonal wear, and the wheel polygonal wear follows the law of “constant frequency and divisible.” Its “constant frequency” comes from the wheel track contact vibration, which stimulates the third-order vertical bending vibration of wheelset and the eighth-order coupled bending vibration of track, and the order is equal to the ratio of “constant frequency” to the wheelset rotation frequency.

Highlights

Polygonal wear of high-speed wheel has long troubled the safe operation of railway [1]
Meywerk [2] established a flexible wheelset model running on a flexible track, considering wheel track vibration in simulation
Wu et al [4] established the multibody dynamics model of vehicle/track coupled and found that the high frequency vibration of wheel track contact may be the main reason for the generation of wheel polygon, and the main reason for the high frequency vibration in the frequency range of 500–800 Hz is the bending vibration modes of the track segment of two wheelsets

Summary

Introduction

Polygonal wear of high-speed wheel has long troubled the safe operation of railway [1]. Meywerk [2] established a flexible wheelset model running on a flexible track, considering wheel track vibration in simulation. Wu et al [4] established the multibody dynamics model of vehicle/track coupled and found that the high frequency vibration of wheel track contact may be the main reason for the generation of wheel polygon, and the main reason for the high frequency vibration in the frequency range of 500–800 Hz is the bending vibration modes of the track segment of two wheelsets. Most of the existing studies are based on statistical analysis of field measured data or theoretical simulation from the perspective of wheel track or vehicle track coupled dynamics, and some conclusions related to wheelset bending or track bending modes have been found. It provides an innovative perspective and theoretical basis for understanding the mechanism of generation and evolution of polygonal wear

Theoretical Analysis and Verification

Polygonal Wear Model of the Wheel

Findings

A: Modal Total Deformation 4 Type: Total Deformation Frequency