Analysis of Aerodynamic Noise Characteristics of Pantograph in High Speed Train

被引：0
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作者：
Yao Y. [1 ,2 ]
Sun Z. [1 ,2 ]
Liu W. [3 ]
Yang G. [1 ,2 ]
机构：
[1] Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing
[2] University of Chinese Academy of Sciences, Beijing
[3] Siemens Industrial Software (Beijing) Co, Ltd, Beijing
来源：
Beijing Daxue Xuebao (Ziran Kexue Ban)/Acta Scientiarum Naturalium Universitatis Pekinensis | 2020年 / 56卷 / 03期
关键词：
Acoustic finite element method; Aerodynamic noise; Delayed detached eddy simulation; High-speed train; Pantograph;
D O I：
10.13209/j.0479-8023.2020.014
中图分类号：
学科分类号：
摘要：
The delayed detached eddy simulation (DDES) coupled with the acoustic finite element method (FEM) is applied to analyze aerodynamic noise characteristics of a high-speed train with a pantograph. Numerical results are presented in terms of spectrum characteristics and distributions of aerodynamic noise in near and far fields in the case of pantograph with demo in up and down situations. The influence of different modeling methods on the flow field of the pantograph is considered, and the effects of scattering and reflection of sound waves from the body and shroud panels on aerodynamic noise results are also took into account. The following interesting phenomena are drawn. 1) Under the pantograph shape and selected opening direction, the noise induced by down-pantograph with dome is higher than that induced by up-pantograph with dome. 2) The noise induced by the dome has a large proportion of noise in the low frequency region below 300 Hz, while the noise induced by the pantograph has a greater influence after 300 Hz. Using the dome as the sound source face, the noise is larger in the case of up-pantograph. 3) About the directivity of the induced noise, in the horizontal plane, the front of the pantograph, the dome contributes more to the noise, and in the rear of the pantograph, the pantograph contributes more. In the upper part of the train, the noise induced by the pantograph itself is greater than the noise induced by the dome, becoming the main source of aerodynamic noise in this case. © 2020 Peking University.
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页码：385 / 398
页数：13
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