Volume 21 Issue 3
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YANG Chun-lei, HUANG Yun-hua, DING Jun-jun. Influences of curve geometric parameters of heavy haul track on wheel/rail coupling dynamic characteristics[J]. Journal of Traffic and Transportation Engineering, 2021, 21(3): 215-227. doi: 10.19818/j.cnki.1671-1637.2021.03.014
Citation: YANG Chun-lei, HUANG Yun-hua, DING Jun-jun. Influences of curve geometric parameters of heavy haul track on wheel/rail coupling dynamic characteristics[J]. Journal of Traffic and Transportation Engineering, 2021, 21(3): 215-227. doi: 10.19818/j.cnki.1671-1637.2021.03.014
shu

Influences of curve geometric parameters of heavy haul track on wheel/rail coupling dynamic characteristics

doi: 10.19818/j.cnki.1671-1637.2021.03.014
  • 1.

    School of Information Engineering, Hubei Minzu University, Enshi 445000, Hubei, China

  • 2.

    School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

Funds:

National Key Research and Development Program of China 2016YFB1200501

National Natural Science Foundation of China 51965016

More Information
  • Author Bio:

    YANG Chun-lei(1973-), male, professor, PhD, 2015017@hbmzu.edu.cn

  • Received Date: 2020-12-22
    Available Online: 2021-08-27
  • Publish Date: 2021-08-27
    Abstract
  • Based on the theory of vehicle-track coupling dynamics, a model of coupling dynamics heavy haul railway freight vehicle-curved track was established according to the actual structures of 27 t axle heavy side-frame cross-bracing bogie and C80E universal gondola recently developed by China. The structural characteristics and technical specification requirements of heavy haul railway curved track was also considered. When heavy haul freight vehicles traveled over curved tracks under different working conditions, the wheel/rail coupling dynamic characteristics were computationally simulated based on the novel fast numerical integration method, the Hertzian theory of nonlinear elastic contact, and the Shen-Hedrick-Elkins nonlinear wheel/rail creep theory. The effects of curve geometric parameters, such as the curve radius, transition curve length, and superelevation of outer rail, on the wheel/rail dynamic interaction of heavy haul freight vehicles were analyzed. Analysis results show that when the curve radius varies between 400 and 800 m, its influence on the wheel/rail dynamic interaction is extremely significant. When the curve radius is greater than 800 m, the influence gradually weakens. Thus, the curve radius of heavy haul track should generally exceed 800 m. Increasing the transition curve length can reduce the wheel/rail dynamic interaction of heavy haul freight vehicles to a certain extent. However, there exists a length inflection point, prior to which the reduction is evident and after which it is minimal. In addition, both the curve radius and operating speed affect the specific position of inflection point. The minimum transition curve lengths for curved railways with different radii should be determined based on the positions of inflection points. A significantly inadequate superelevation or surplus superelevation will aggravate the wheel/rail dynamic interaction of heavy haul freight vehicles when they travel over curved tracks. However, when the inadequate superelevation is between -20 and 0 mm, the comprehensive wheel/rail dynamic response of heavy haul freight vehicles is relatively minor. In other words, the heavy haul freight vehicles passing over curved tracks at a properly inadequate superelevation (-20 mm to 0 mm) is beneficial for reducing the dynamic interaction and wear of wheel/rail. This is consistent with the actual range of inadequate superelevation specified by the railway engineering transportation department of China. 4 tabs, 7 figs, 51 refs.

     

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    • References(51)
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