• ISSN 0258-2724
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Volume 60 Issue 2
Apr.  2025
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Journal of Southwest Jiaotong University  > 2025  >  60(2): 336-345.
QI Yayun, LI Long, SHI Huailong, SONG Ye, DAI Huanyun. Influence of Temperature-Varying Characteristics on Operating Performance of Alpine Electric Multiple Units[J]. Journal of Southwest Jiaotong University, 2025, 60(2): 336-345. doi: 10.3969/j.issn.0258-2724.20220876
Citation: QI Yayun, LI Long, SHI Huailong, SONG Ye, DAI Huanyun. Influence of Temperature-Varying Characteristics on Operating Performance of Alpine Electric Multiple Units[J]. Journal of Southwest Jiaotong University, 2025, 60(2): 336-345. doi: 10.3969/j.issn.0258-2724.20220876
shu

Influence of Temperature-Varying Characteristics on Operating Performance of Alpine Electric Multiple Units

doi: 10.3969/j.issn.0258-2724.20220876
  • 1.

    School of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing 400074, China

  • 2.

    State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China

  • 3.

    Baotou Beifang Chuangye Co., Ltd., Baotou 014030, China

  • Received Date: 20 Dec 2022
  • Rev Recd Date: 20 Mar 2023
    • Available Online: 17 Jun 2024
  • Publish Date: 11 May 2023
    Abstract

  • The service environment of alpine electric multiple units (EMUs) is affected by temperature for a long time, and the vehicle suspension element parameters and under-rail parameters have strong seasonal variation characteristics. To investigate the influence of temperature-varying characteristics of rubber elements on the operating performance of alpine EMUs, a multi-body dynamics model of alpine EMUs was established to analyze the vehicle dynamics characteristics under different temperatures. Then, the wheel wear characteristics at different temperatures were analyzed by the Jendel wear model. Finally, the wheel surface fatigue index was proposed based on the fatigue prediction model. The results show that the temperature variation will change the stiffness and damping value of suspension parameters, and the stiffness of suspension parameters increases as the temperature decreases. The dynamic performance of the EMUs decreases at low temperatures. The wear of the vehicle increases as the temperature decreases. After 200 000 miles of operation, the largest depth of wheel wear is found at a temperature of −40 ℃, which is 6.2% greater than the depth of wheel wear at a temperature of 20 ℃. The surface contact fatigue index gradually increases as the temperature decreases, with wheel surface fatigue indexes being 6.4648×10−4, 6.6150×10−4, and 6.7885×10−4 at temperatures of 20 ℃, −20 ℃, and −40 ℃, respectively. Temperature-varying characteristics have a large effect on the suspension parameters of alpine EMUs, with dynamic performance deteriorating at low temperatures, wear intensifying, and wheel surface fatigue increasing.

     

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