高速列车受电弓气动噪声特性分析

doi:10.3969/j.issn.0258-2724.2015.05.025

详细信息

作者简介:
杜健(1977-),女,高级工程师,研究方向为高速动车组车体结构及空气动力学,E-mail:dujian@cqsf.com

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出版历程
- 收稿日期:2015-04-20
- 刊出日期:2015-10-25

Analysis of Aeroacoustics Characteristics for Pantograph of High-Speed Trains

摘要

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.
- 高速列车/
- 受电弓/
- 气动噪声/
- 脉动压力/
- 声压级/
- 指向性
Abstract: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.
- high-speed train/
- pantograph/
- aerodynamic noise/
- fluctuating pressure/
- sound pressure level/
- directivity

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参考文献 (58)

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