A probe into air pressure pulse amplitude of high-speed trains crossing in open air

被引：6
|
作者：
Xi Y.-H. [1 ,2 ]
Mao J. [1 ,2 ]
Liu R.-D. [1 ]
Yang G.-W. [3 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
[2] Beijing Key Laboratory of Track Engineering, Beijing Jiaotong University, Beijing
[3] Institute of Mechanics, Chinese Academy of Sciences, Beijing
来源：
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2016年 / 44卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Air pressure pulse amplitude; Boundary layer; Crossing pressure wave; High-speed train; Numerical simulation;
D O I：
10.3969/j.issn.1000-565X.2016.03.017
中图分类号：
学科分类号：
摘要：
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, tracking 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 amplitude in comparison with monitoring point height when other conditions keep constant. © 2016, Editorial Department, Journal of South China University of Technology. All right reserved.
引用
收藏
页码：118 / 127
页数：9
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