Adhesion Adaptability of Dual-Source-Powered Electric Multiple Unit on Qinghai−Xizang Line

WANG Bo; LUO Shihui; WANG Chen; QU Tianwei; MA Weihua; LEI Cheng

doi:10.3969/j.issn.0258-2724.20220843

Volume 60 Issue 1

Jan. 2025

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Journal of Southwest Jiaotong University > 2025 > 60(1): 214-224.

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WANG Bo, LUO Shihui, WANG Chen, QU Tianwei, MA Weihua, LEI Cheng. Adhesion Adaptability of Dual-Source-Powered Electric Multiple Unit on Qinghai−Xizang Line[J]. Journal of Southwest Jiaotong University, 2025, 60(1): 214-224. doi: 10.3969/j.issn.0258-2724.20220843

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Adhesion Adaptability of Dual-Source-Powered Electric Multiple Unit on Qinghai−Xizang Line

doi: 10.3969/j.issn.0258-2724.20220843

WANG Bo^{1, 2
,},
LUO Shihui¹,
WANG Chen³,
QU Tianwei⁴,
MA Weihua^{1
,
,},
LEI Cheng²

1.
State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, China
2.
Henan Engineering Research Center of Rail Transit Intelligent Security, Zhengzhou Railway Vocational & Technical College, Zhengzhou 451460, China
3.
School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
4.
CRRC Dalian Co., Ltd., Dalian 116022, China

Received Date: 02 Dec 2022
Rev Recd Date: 07 Jul 2023

Available Online: 04 Jun 2024

Publish Date: 26 Sep 2023

Abstract

Abstract

In order to analyze the feasibility of a dual-source-powered electric multiple unit (EMU) with enhanced operational efficiency on the Qinghai–Xizang Line (Golmud–Lhasa section), the dynamics model of EMU was established and verified. A dynamic method was adopted to study the relationship among the traction adhesion coefficients, traction force, creepage, and speed for the dual-source-powered EMU and the HXN₃ internal combustion locomotive operating on the straight sections, curved sections, and ramps of the Qinghai–Xizang Line. The adhesion characteristics of dual-source-powered EMU under traction conditions were validated by comparing the dynamic responses of the two locomotives. The analysis finds that: 1) The traction adhesion coefficients of the locomotives are proportional to their traction force. Moreover, within the speed range of 40–120 km/h, the adhesion coefficient of the dual-source-powered EMU decreases from 0.19 to 0.09, while the adhesion affluence increases from 59.0% to 85.7%. 2) The adhesion affluence of the dual-source-powered EMU is superior to that of the HXN₃ locomotive in both straight sections and ramps, thereby enhancing its ability to cope with low wheel-rail adhesion conditions in harsh external environments and exhibiting better adaptability in plateau environments. 3) In the curved section, by ignoring the structure-induced adhesion reduction difference, the adhesion reduction amplitudes of the dual-source-powered EMU and HXN₃ locomotive are 6.3% and 6.8%, respectively, at R300 m curve. At the R800 m curve, the HXN₃ locomotive demonstrates an adhesion reduction amplitude of 3.0%, while the adhesion reduction amplitude of the dual-source-powered EMU is below the threshold value, ensuring sufficient adhesion.
- plateau railway,
- dual-source-powered,
- internal combustion locomotive,
- dynamic,
- traction adhesion

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References(27)

References

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