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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2020  >  20(1): 132-139
ZOU Si-min, HE Xu-hui, WANG Han-feng, TANG Lin-bo, PENG Tian-wei. Wind tunnel experiment on aerodynamic characteristics of high-speed train-bridge system under crosswind[J]. Journal of Traffic and Transportation Engineering, 2020, 20(1): 132-139. doi: 10.19818/j.cnki.1671-1637.2020.01.010
Citation: ZOU Si-min, HE Xu-hui, WANG Han-feng, TANG Lin-bo, PENG Tian-wei. Wind tunnel experiment on aerodynamic characteristics of high-speed train-bridge system under crosswind[J]. Journal of Traffic and Transportation Engineering, 2020, 20(1): 132-139. doi: 10.19818/j.cnki.1671-1637.2020.01.010
shu

Wind tunnel experiment on aerodynamic characteristics of high-speed train-bridge system under crosswind

doi: 10.19818/j.cnki.1671-1637.2020.01.010
  • 1.

    School of Civil Engineering, Central South University, Changsha 410075, Hunan, China

  • 2.

    National Engineering Laboratory for High-Speed Railway Construction, Central South University, Changsha 410075, Hunan, China

More Information
  • Author Bio:

    ZOU Si-min(1990-), male, doctoral student, zsm1990@163.com

    HE Xu-hui (1975-), male, professor, PhD, xuhuihe@csu.edu.cn

  • Received Date: 2019-07-21
  • Publish Date: 2020-02-25
    Abstract
  • To study the aerodynamic characteristics of a high-speed train in operation and analyze the mechanism of aerodynamic characteristics change, two wind tunnel experimental schemes for aerodynamic characteristics of the high-speed train-bridge system were designed. A high-speed train-bridge test method and system appropriate for wind tunnel were developed and established. The system consisted of two parts including the motion system and the data acquisition system. The motion system was based on the inertial drive mechanism, the high-speed servo motor served as the power, through the high strength rotary conveyor belt, and the moving vehicle model with a scale ratio of 1∶8-1∶30 with a maximum speed of around 50 m·s-1could run in the wind tunnel to simulate the real operating environment.Taking the motion system as the carrier, a set of data acquisition systems was developed for measuring the aerodynamic characteristic of trains with or without the crosswind in the wind tunnel. Analysis result shows that the experimental method and system can be applied to the test scenarios with a short acceleration-deceleration distance and the high instantaneous acceleration. The system is not only free from the shape of vehicle and infrastructure but also reduces the design cost and improves the safety and stability of test.The standard error-mean value ratios are less than 10%, which shows that the aerodynamic characteristics of the train tested by the data acquisition system have good stability and repeatability, the aerodynamic characteristics of train in different tests can be obtained accurately. By comparing the test of train with or without the crosswind, the impact of speed of moving train on the aerodynamic is extremely important.While the train running at high speed, the aerodynamic effects due to the speed of train are much larger than the crosswind, and the mean wind pressure coefficient is up to-10, which reflects that the static model test method can not meet the requirements of the simulation of the aerodynamic characteristics of the train in high-speed operation.

     

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