高速列车受电弓气动噪声特性分析  

Analysis of Aeroacoustics Characteristics for Pantograph of High-Speed Trains

作　　者：杜健[1] 梁建英[1] 田爱琴[1] 

机构地区：[1]南车青岛四方机车车辆股份有限公司,山东青岛266111

出　　处：《西南交通大学学报》2015年第5期935-941,共7页Journal of Southwest Jiaotong University

摘　　要：为研究高速列车受电弓气动噪声源分布及频谱特性,利用计算流体力学原理对高速列车受电弓流场进行计算,获得了受电弓表面脉动压力;在此基础上,利用FW-H方程计算高速列车受电弓远场气动噪声.计算结果表明：高速列车受电弓远场气动噪声具有较为明显的指向性,其指向性基本上不受列车速度的影响;远场监测点总声压及在10°~20°附近达到最大.受电弓气动噪声的总声压级随着列车速度的增加而显著增大;受电弓远场气动噪声具有明显的主频,且随着列车速度的增加,远场气动噪声的主频也增大;受电弓顶部横梁是引起受电弓气动噪声的主要因素.In order to study aerodynamic noise source distribution and frequency spectrum for the pantograph of high-speed trains,the flow field for the pantograph of high-speed trains was calculated using the computational fluid dynamics method,and the fluctuating pressure on the surface of the pantograph was obtained. On this basis,the far-field aerodynamic noise for the pantograph was computed using the FW-H equation. Computational results show that the aerodynamic noise for the pantograph of high-speed trains has obvious directivity,which is not affected by the train speed,and the total sound pressure level of the far-field measurement points reaches the maximum near the 10° ~20°. Moreover,the total sound pressure level increases significantly with the train speed. The far-field aerodynamic noise has obvious main frequency that increases with the train speed. The beam at the top of the pantograph is a main contributor to the aerodynamic noise for the pantograph.

关 键 词：高速列车 受电弓 气动噪声 脉动压力 声压级 指向性 

分 类 号：U292.914[交通运输工程—交通运输规划与管理]