Volume 21 Issue 5
Nov.  2021
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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2021  >  21(5): 114-124
YAO Yuan, XU Zhen-fei, SONG Ya-dong, SHEN Long-jiang, LI Chuan-long. Mechanism of train tail lateral sway of EMUs in tunnel based on vortex-induced vibration[J]. Journal of Traffic and Transportation Engineering, 2021, 21(5): 114-124. doi: 10.19818/j.cnki.1671-1637.2021.05.010
Citation: YAO Yuan, XU Zhen-fei, SONG Ya-dong, SHEN Long-jiang, LI Chuan-long. Mechanism of train tail lateral sway of EMUs in tunnel based on vortex-induced vibration[J]. Journal of Traffic and Transportation Engineering, 2021, 21(5): 114-124. doi: 10.19818/j.cnki.1671-1637.2021.05.010
shu

Mechanism of train tail lateral sway of EMUs in tunnel based on vortex-induced vibration

doi: 10.19818/j.cnki.1671-1637.2021.05.010
  • 1.

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

  • 2.

    CRRC Zhuzhou Electric Locomotive Co., Ltd., Zhuzhou 412000, Hunan, China

  • 3.

    CRRC Dalian Locomotive and Rolling Stock Co., Ltd., Dalian 116022, Liaoning, China

Funds:

National Natural Science Foundation of China 51675443

National Natural Science Foundation of China 51735012

Project of Science and Technology Research and Development Plan of China Railway N2021J028

Project of Science and Technology Research and Development Plan of China Railway N2020J026

More Information
  • Author Bio:

    YAO Yuan(1983-), male, researcher, PhD, yyuan8848@163.com

  • Received Date: 2021-03-27
    Available Online: 2021-11-13
  • Publish Date: 2021-10-01
    Abstract
  • Aiming at the train tail lateral sway of 160 km·h-1 electric multiple units (EMUs), which occurs in single-track tunnels, the mechanism was put forward that the vortex shedding effect of gas flow in the train tail causes the vortex-induced vibration of the car-body and results in the lateral sway of the train tail. Relevant mitigation measures, such as the optimization of vehicle suspension parameters, were studied. Based on the structural parameters of a certain type of locomotive, the vehicle lateral dynamics model was established and combined with the semi-empirical nonlinear vortex-induced vibrator model to enable the fluid-solid coupling lateral dynamics calculation during the vortex-induced vibration. Calculation results show that a large lateral vortex-induced force acting on the train tail of EMUs in a single-track tunnel and the resonance between the vortex-induced frequency and the car-body hunting frequency are the main causes of car-body sway. Reducing the lateral vortex-induced force and improving the vehicle hunting stability are effective measures to reduce the amplitude of the car-body sway. For this type of locomotive, avoiding wheel-rail contact with a lower equivalent conicity is required to prevent aggravation of the vortex-induced vibration by vehicle primary hunting behavior. When the damping of the yaw damper is reduced from 800 kN·s·m-1 to 400 kN·s·m-1, the lateral vibration acceleration amplitude in the rear end of the car-body during vortex-induced resonance is reduced by 40%. When the semi-active control with skyhook damping in the secondary lateral suspension is adopted, the lateral vibration amplitude of the car-body in the vortex-induced resonance zone is effectively reduced. Moreover, the lateral ride comfort at the front and rear ends of the car-body can be guaranteed. 1 tab, 9 figs, 29 refs.

     

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