Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (3): 118-127.doi: 10.3969/j.issn.1000-565X.2016.03.017

• Traffic & Transportation Engineering • Previous Articles     Next Articles

A Probe into Air Pressure Pulse Amplitude of High-Speed Trains Crossing in Open Air

XI Yan-hong1,2 MAO Jun1,2 LIU Run-dong1 YANG Guo-wei3   

  1. 1.School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China; 2.Beijing Key Laboratory of Track Engineering,Beijing Jiaotong University,Beijing 100044,China; 3.Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China
  • Received:2014-10-08 Revised:2015-10-21 Online:2016-03-25 Published:2016-02-02
  • Contact: 郗艳红(1980-)，女，博士后，讲师． 主要从事高速列车空气动力学与行车安全、火灾安全等研究． E-mail:yhxi@bjtu.edu.cn
  • About author:郗艳红(1980-)，女，博士后，讲师． 主要从事高速列车空气动力学与行车安全、火灾安全等研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China(51278032)

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Abstract: The aerodynamic characteristics of high-speed trains passing by in open air are numerically analyzed on the basis of moving mesh.Then,the Steinheur empirical formula for calculating air pressure pulse amplitude is mo- dified,and a new formula is presented.The results show that (1) the pressure pulse amplitude of low-speed trains passing by in open air is less than that of high-speed trains; (2) the amplitude is related to crossing speed,track- ing distance as well as monitoring point height,and is basically proportional to the traveling speed square of trains; (3) smaller tracking distance results in higher amplitude; and (4) tracking distance has a greater effect on the am- plitude in comparison with monitoring point height when other conditions keep constant.

Key words: high-speed train, crossing pressure wave, air pressure pulse amplitude, numerical simulation, boundary layer

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