Wheel Tread Wear Characteristics of High-Speed Electric Multi-Units

XU Kai; LI Fu; AN Qi; MAO Wenhui

doi:10.3969/j.issn.0258-2724.20190266

Volume 56 Issue 1

Jan. 2021

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Journal of Southwest Jiaotong University > 2021 > 56(1): 92-100.

XU Kai, LI Fu, AN Qi, MAO Wenhui. Wheel Tread Wear Characteristics of High-Speed Electric Multi-Units[J]. Journal of Southwest Jiaotong University, 2021, 56(1): 92-100. doi: 10.3969/j.issn.0258-2724.20190266

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XU Kai, LI Fu, AN Qi, MAO Wenhui. Wheel Tread Wear Characteristics of High-Speed Electric Multi-Units[J]. Journal of Southwest Jiaotong University, 2021, 56(1): 92-100. doi: 10.3969/j.issn.0258-2724.20190266

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Wheel Tread Wear Characteristics of High-Speed Electric Multi-Units

doi: 10.3969/j.issn.0258-2724.20190266

XU Kai^{1,2
,},
LI Fu^{1
,
,},
AN Qi³,
MAO Wenhui⁴

Received Date: 02 Apr 2019
Rev Recd Date: 21 Aug 2019

Available Online: 04 Sep 2019

Publish Date: 01 Feb 2021

Abstract

Abstract

In order to study the wheel tread wear characteristics of different types of high-speed electric multi-units (EMU) vehicles, and to explore vehicle performance evolution in the period of wheel wear, the CRH380A and CRH380B EMU running on Wuhan–Guangzhou passenger dedicated line are targeted. Based on the line data statistics, the high-speed EMU models by SIMPACK and the rail wear program, the wheel wear characteristics of two types of EMU vehicles and wear impact on vehicle running performance are analyzed in a turning repair cycle. The results show that the EMU on this dedicated line mostly show the tread hollow wear, and the wheel tread wear of the CRH380A EMU is more serious. In a turning repair cycle, due to the differences in the design concepts of the two types of EMU vehicles, the CRH380A EMU shows a narrower wear range, greater wear depth, and more obvious hollow wear; however, the CRH380B EMU shows a wider wear range, smaller wear depth, and more uniform wear. Within the operating distance of 250000 km, the running stability of the CRH380A EMU with the new wheels is obviously better than the CRH380B EMU, but when the distance exceeds 100000 km, due to the wheel wear, the running stability of the CRH380A EMU is worse than that of the CRH380B EMU. The maximum vibration acceleration and riding index of CRH380A EMU are 0.52 m/s² and 2.26, respectively, which are better than 0.58 m/s² and 2.38 of CRH380B EMU, but its derailment coefficient and wheel load reduction rate are both 0.35, which are greater than 0.14 and 0.28 of the CRH380B EMU. Therefore, during the entire operation cycle, the riding comfort of the CRH380A EMU is better than the CRH380B EMU, but its operation safety is worse than that of the CRH380B EMU.
- high-speed electric multi-units,
- wheel tread,
- wear,
- vehicle system dynamic,
- running performance

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