| 基于有限元-无限元法的列车声辐射 |
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| 引用本文： | 朱程,郑天锐,徐力,金鑫,汤学军,周劲松.基于有限元-无限元法的列车声辐射[J].科学技术与工程,2023,23(27):11810-11815. |
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| 作者姓名： | 朱程 郑天锐 徐力 金鑫 汤学军 周劲松 |
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| 作者单位： | 中车南京浦镇车辆有限公司 技术中心;同济大学 铁道与城市轨道交通研究院 |
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| 基金项目： | 国家自然科学基金(51805373)；中央高校基本科研业务费专项资金项目(22120210558) |
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| 摘 要： | 基于有限元-无限元理论，建立某型车辆的有限元模型，并对车辆近场监测点、远程监测面及无限元边界面进行设置，利用直接频响方法对头车、中间车及尾车的关键区域在不同频率下的声场特性进行分析。计算结果表面：头车和尾车区域在低频区段时车体顶部平滑区域的声辐射较小，在车体鼻尖及其下方的转向架区域的声压级较大，其中尾车后方区域内的相比头车的声压级水平和声辐射范围偏大，存在明显的流场影响，但在高频区段时其整体声压级均匀且水平较低。中间车区域在低频区段时受电弓区域的声压级水平很高，尤其在碳滑板和底架处尤为明显，其次在转向架区域的声辐射能力也较大，随着频率的提升，其能量也有显著的衰减。研究结果对高速列车的气动声学设计具有一定的参考价值。
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| 关 键 词： | 有限元-无限元法 气动声学 车辆 声压级 |
| 收稿时间： | 2022/11/26 0:00:00 |
| 修稿时间： | 2023/3/8 0:00:00 |
Research on Train Sound Radiation Based onFinite-Infinite Element Method |
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| Zhu Cheng,Zheng Tianrui,Xu Li,Jin Xin,Tang Xuejun,Zhou Jinsong.Research on Train Sound Radiation Based onFinite-Infinite Element Method[J].Science Technology and Engineering,2023,23(27):11810-11815. |
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| Authors: | Zhu Cheng Zheng Tianrui Xu Li Jin Xin Tang Xuejun Zhou Jinsong |
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| Affiliation: | Techology Center of CRRC Nanjing Puzhen CoLtd; Institute of Railway and Urban Rail Transit,Tongji University |
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| Abstract: | Based on the finite-infinite element theory, the finite element model of a certain type of vehicle is established, and the near-field monitoring points, remote monitoring surfaces and infinite element boundary interfaces of the vehicle are set. The characteristics of the sound field of the key areas of the head vehicle, intermediate vehicle and tail vehicle under different frequencies are analyzed using the direct frequency response method. The calculation results show that the sound radiation in the smooth area at the top of the car body is small in the low frequency section of the head car and the tail car area, and the sound pressure level in the bogie area at the nose of the car body and below it is large. The sound pressure level and sound radiation range in the rear area of the tail car are larger than those of the head car, and there is obvious flow field influence, but the overall sound pressure level is uniform and low in the high frequency section. The sound pressure level in the pantograph area in the middle car area is very high in the low-frequency section, especially at the carbon slide plate and underframe. Secondly, the sound radiation capacity in the bogie area is also large. With the increase of frequency, its energy also has a significant attenuation. The research results have a certain reference value for the aerodynamic acoustic design of high-speed trains. |
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| Keywords: | Finite-infinite element method Aeroacoustics Vehicle Sound pressure level |
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