| 谢素明,张磊,付亚兰,兆文忠.铁路客车室内噪声预测与控制技术研究[J].计算力学学报,2009,26(3):336~341 |
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| 铁路客车室内噪声预测与控制技术研究 |
| Research on prediction and control of interior noise in railway passenger-car |
| 投稿时间：2008-08-08 |
| DOI：10.7511/jslx20093009 |
| 中文关键词: 铁路客车 结构-声耦合 FEM／BEM 声学贡献度 |
| 英文关键词:passenger train acoustic-structure coupling FEM／BEM acoustic contribution |
| 基金项目:国家863(2006AA04Z160);辽宁省教育厅(2008S037)资助项目. |
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| 中文摘要: |
| 为探索铁路客车室内低频噪声预测分析与控制的可行办法,提高车室内噪声品质,本文基于有限元和边界元结合的方法给出了铁路客车结构-声场耦合系统振动分析模型的建模方法;通过对比分析结构振动模态、车室内空腔声学模态以及结构-声场耦合系统模态的相关性,澄清车室内噪声形成机理;对客车结构-声场耦合系统在0 Hz~200Hz频率范围内进行谐响应分析之后,确定了室内噪声观测平面及测试点在不同频率下的声压级,通过对客车车身面板声学贡献度的分析,确定主要噪声源和对内部声场影响较大的面板,为降低噪声而试图对客车结构进行修改提供了 |
| 英文摘要: |
| In order to improve interior acoustic quality of railway passenger-car, research on prediction and control of low-frequency noise inside the passenger-car is performed based on FEM and BEM. A passenger-car model is set up, giving consideration to structure-acoustic coupling characteristic of the car. The mode analysis and harmonic analysis under 0 Hz~200 Hz for the car structure model, air cavity model and acoustic-structure coupling model are carried on, respectively. Then, the acoustic field distribution at low frequency inside the car is analyzed, and acoustic contribution coefficient of car-body panel at focused frequencies are studied to identify the main structure-borne noise sources. Hereby the approach in this paper can be used to provide theoretical data for structure acoustic design at low-frequency. |
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