| 弹性长方体封闭结构腔声辐射建模与分析 |
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| 引用本文： | 姚昊萍,张建润,陈南,孙庆鸿.弹性长方体封闭结构腔声辐射建模与分析[J].东南大学学报(自然科学版),2005,35(6):889-893. |
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| 作者姓名： | 姚昊萍 张建润 陈南 孙庆鸿 |
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| 作者单位： | 东南大学机械工程系,南京,210096 |
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| 基金项目： | 中国科学院资助项目，江苏省科技计划 |
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| 摘 要： | 基于Dowell的结构-声耦合理论、瑞利积分和声波透射理论,由各阶声压模态对应的声压振幅响应和各阶板模态对应的速度振幅响应公式推导出了由6块四边简支弹性板构成的封闭矩形腔外的辐射和透射声场解析解.在此基础上论述了声场的物理特性,并指出腔体外的声场主要为辐射声场.为进一步验证结果的正确性,运用有限元法计算腔体内的声模态和弹性板的振动模态及其耦合系数,结合边界元法计算出腔体外的声压响应,并将此数值仿真结果与解析结果进行比较,验证了理论推导的正确性.
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| 关 键 词： | 弹性结构封闭声腔 辐射声场 数值仿真 |
| 文章编号： | 1001-0505（2005）06-0889-05 |
| 收稿时间： | 04 29 2005 12:00AM |
| 修稿时间： | 2005-04-29 |
Modelling and analysis of sound radiation of elastic rectangular enclosure |
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| Yao Haoping,Zhang Jianrun,Chen Nan,Sun Qinghong.Modelling and analysis of sound radiation of elastic rectangular enclosure[J].Journal of Southeast University(Natural Science Edition),2005,35(6):889-893. |
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| Authors: | Yao Haoping Zhang Jianrun Chen Nan Sun Qinghong |
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| Institution: | Department of Mechanical Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | The radiated and transmitted acoustic field of rectangular enclosure consisted of six simply supported flexible panel is deduced by using the amplitude of sound pressure and the amplitude of velocity,based on structuralacoustic coupling theory provided by Dowell,Rayleigh integral and transmission theory in this paper.The characteristic of acoustic field is dissertated.Moreover,the exterior field dominanted by radiated sound field is pointed out.Then,modes of sound pressure and flexible panel are obtained by FEM(finite element method).Modal coupling coefficients are also synthesized.Finally,the response of sound pressure is worked out by BEM(boundary element method).The result of the simulation method coincides well with the analytical result. |
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| Keywords: | elastic enclosure radiated acoustic field computer simulation |
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