高速列车明线会车压力波波幅研究  

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

作　　者：郗艳红[1,2] 毛军[1,2] 柳润东 杨国伟[3] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京交通大学轨道工程北京市重点实验室,北京100044 [3]中国科学院力学研究所,北京100190

出　　处：《华南理工大学学报（自然科学版）》2016年第3期118-127,共10页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51278032)~~

摘　　要：采用移动网格原理对列车明线交会的空气动力学特性进行了数值模拟.修正了Steinheur经验公式,并给出了等速交会的列车表面压力波波幅的新计算公式.研究表明:交会列车低速时对应的压力波幅值小于高速时的幅值;波幅与交会速度、交会侧间距和监测点的高度有关,并近似与列车运行速度的平方成正比;交会侧间距越小,波幅越大;在其他条件不变的情况下,交会侧间距比高度对压力波幅的影响大.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 modified,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.

关 键 词：高速列车 交会压力波 压力波幅值 数值模拟 边界层 

分 类 号：U271.91[机械工程—车辆工程]