高速列车车身表面气动噪声源研究  

Research on the Aerodynamic Noise Source on Surface of High Speed Trains

作　　者：刘加利[1] 张继业[1] 张卫华[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《铁道车辆》2010年第5期1-5,共5页Rolling Stock

基　　金：铁道部科技研究开发计划(2009J001-D);国家自然科学基金(50525518)

摘　　要：介绍了计算气动噪声源的宽频带噪声源模型,建立了高速列车三维绕流流动的物理数学模型,数值模拟了在不同运行速度下高速列车在平地、路堤和高架桥上的外部流场,进而利用宽频带噪声源模型对车身表面气动噪声源进行了计算。计算结果表明,3种运行工况下车身表面噪声源的分布规律很相似,而且随着列车运行速度的提高,列车车身声功率及表面声功率都显著增加,因此,降低气动噪声对发展高速列车至关重要。The model of broadband noise source in calculation of aerodynamic noise source is described.The physical mathematics model of the three-dimensional flow of high speed trains is set up.The external flow fields of high speed trains on level ground,embankment and viaducts at different operation speeds are simulated digitally,and the model of broadband noise source is used to make the calculation of the aerodynamic noise source on surface of the train.The calculation result shows that the distribution patterns of noise sources on surface of the train under three operation conditions are similar.With the improvement of operation speed of the train,the train body sound power and the surface sound power increase obviously,therefore,reduction of aerodynamic noise is very important for development of high speed trains.

关 键 词：高速列车 气动噪声 噪声源 宽频带噪声源模型 

分 类 号：U270.16[机械工程—车辆工程]