Numerical simulation on aerodynamic noise of 120 km/h metro train

YAN Lei; YOU Tianyv; YANG Zhigang

doi:10.13890/j.issn.1000-128X.2022.02.005

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Numerical simulation on aerodynamic noise of 120 km/h metro train

Vehicle Safety and Comfort | 更新时间：2024-08-02

- Numerical simulation on aerodynamic noise of 120 km/h metro train
- Electric drive for locomotives Issue 2, Pages: 26-30(2022)
- 作者机构：
  
  1.中车青岛四方机车车辆股份有限公司，山东青岛　266111
  2.中南大学交通运输工程学院　轨道交通安全教育部重点实验室，湖南　长沙　410075
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128X.2022.02.005
  CLC： U231;U270.1⁺6
- Published：10 March 2022，
  
  Received：24 January 2022，
  
  Revised：02 March 2022，
- 稿件说明：
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YAN Lei, YOU Tianyv, YANG Zhigang. Numerical simulation on aerodynamic noise of 120 km/h metro train. [J]. Electric drive for locomotives (2):26-30(2022)
DOI：

YAN Lei, YOU Tianyv, YANG Zhigang. Numerical simulation on aerodynamic noise of 120 km/h metro train. [J]. Electric drive for locomotives (2):26-30(2022) DOI： 10.13890/j.issn.1000-128X.2022.02.005.

摘要

列车噪声影响车内乘客舒适性，其产生原理复杂，在一定程度上影响着轨道交通车辆的发展，开展列车噪声研究意义重大。文章采用数值仿真方法，以3辆车编组、带转向架、无受电弓的1:8缩比列车模型为基础，运用软件ICEM的拓扑优化、多层网格加密技术、附面层网格技术与网格拉伸技术开展精细化四面体/三棱柱网格划分，构建列车明线运行环境下的计算域网格。通过建立地铁列车气动噪声仿真模型，研究了80 km/h、120 km/h和130 km/h不同工况下列车明线运行的气动声学特性；分析了不同速度下地铁列车流场脉动性能、气动噪声源性能和远场辐射噪声性能，研究列车外部流场情况及其声学规律。仿真结果表明，随着列车运行速度增加，列车车体表面的声功率级逐渐增加，声源能量和声压级也随之增大。对时速120公里地铁列车气动噪声特性的研究可为地铁车型气动声学优化设计提供参考。

Abstract

The mechanism of noise generated by rail vehicles in the process of driving is complex. Noise problems not only cause trouble to the comfort of passengers

but also restrict the development and application of rail transit vehicle to a certain extent. Therefore

the research on the noise of standard metro trains has important implications. Through the numerical simulation method

based on the 1:8 scaled model of 3-vehicle marshalling with bogies and without pantograph

using the topology optimization

multi-layer mesh refinement technology

boundary layer mesh technology and mesh stretching technology of the commercial meshing software ICEM to develop refined tetrahedral/triangular prism meshing

the computational domain mesh under the open-line operation was built. The simulation model of the aerodynamic noise of metro train was established

and the aeroacoustics characteristics of the open-line operation under different working conditions of 80 km/h

120 km/h and 130 km/h were studied. Specifically

the flow field pulsation performance

aerodynamic noise source performance and far-field radiated noise performance of metro trains under different velocity were analyzed

the external flow field and acoustic law of train were researched. The simulated results show that with the increase of train's speed

the sound power level on the surface of the train body

sound source energy and sound pressure level increase gradually. The research on the aerodynamic noise characteristics of metro trains with a speed of 120 kilometers per hour in this paper provides a reference basis for the aeroacoustics optimization design of other metro trains.

关键词

地铁列车仿真流场脉动气动噪声源远场辐射噪声

Keywords

metro trainsimulationflow field pulsationaerodynamic noise sourcefar-field radiated noise

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