Aerodynamic Noise Analysis of High-speed Train Pantograph and Study on Noise Reduction of Pantograph Head

被引：0
|
作者：
Yuan X. [1 ]
Miao X. [2 ]
Yuan T. [1 ]
Yang J. [1 ]
机构：
[1] School of Urban Rail Transportation, Shanghai University of Engineering Science, Shanghai
[2] School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2021年 / 43卷 / 12期
关键词：
Aerodynamic noise; Bionic noise reduction; Broadband noise; FW-H sound analogy method; Large eddy simulation; Pantograph;
D O I：
10.3969/j.issn.1001-8360.2021.12.005
中图分类号：
学科分类号：
摘要：
Aiming at the environmental noise pollution due to the rapid increase of aerodynamic noise caused by the constant speed increase of high-speed trains, an aerodynamic noise analysis model for pantograph of Fuxing high speed train was established to study the characteristics of aerodynamic noise source, far field noise propagation and frequency domain distribution, based on RNG k-ε model, large eddy simulation and FW-H sound analogy method. The results of the numerical simulation show that the maximum noise contribution of the train is the head of pantograph. The far-field aerodynamic noise of the pantograph is the largest when its center of mass points is in the direction of the head of pantograph. The far field sound pressure level is linearly related to the logarithm of the propagation distance. The pantograph aerodynamic noise is broadband noise and distributes in the range of 25~6 000 Hz, with the main frequency between 145~315 Hz. According to the above research results, this paper conducted a bionic noise reduction study on the main noise source, the head of pantograph. Considering the bidirectional running characteristics of the high speed train, a symmetrical ellipsoidal convex structure was applied on the carbon slide and round bar. The noise reduction effect was most obvious when the height of the carbon slide and the round bar was 60 mm and 10.5 mm respectively. The total sound pressure level of Fuxing is reduced by 2.56 dBA at a distance of 7.5 m. © 2021, Department of Journal of the China Railway Society. All right reserved.
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页码：38 / 48
页数：10
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