地铁列车气动噪声数值模拟研究

Numerical Simulation Investigation on Aero Acoustics of Subway Train

随着地铁交通的快速发展和城市人居环境要求的不断提高,地铁沿线噪声问题日益突出,已成为城市建设与发展中人们关注的焦点之一。本文利用计算气动声学CAA(Computational Aero Acoustics)方法,对地铁列车在空旷地段匀速直线行驶和由地下隧道匀速驶出地面这两类营运工况下,地铁列车气动噪声对周围环境的影响进行数值模拟计算,评估分析地铁运行时产生的气动噪声对线路周边环境的影响。

With the rapid development of subway and the increasing requirements of urban living environment, the resulting noise problems along the metro lines become increasingly prominent. This has become a focus of attention in urban construction and development. In this paper, when the train is travelling in constant velocity on ground and from tunnel to ground, the aero acoustics of subway train is calculated in method of numerical simulation which is based on computational aero acoustics. Then the influence on the environment along the metro lines could be evaluated quantitatively.