| Analytical research on structural-acoustic coupling of a cavity surrounded by flexible panel |
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| 引用本文： | JIN Guoyong YANG Tiejun LIU Zhigang JI Zhenlin LIWanyou. Analytical research on structural-acoustic coupling of a cavity surrounded by flexible panel[J]. 声学学报：英文版, 2007, 26(2): 138-157 |
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| 作者姓名： | JIN Guoyong YANG Tiejun LIU Zhigang JI Zhenlin LIWanyou |
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| 作者单位： | School of Power and Energy Engineering, Harbin Engineering University Harbin 150001 |
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| 基金项目： | 黑龙江省哈尔滨市科技攻关项目 |
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| 摘 要： | The structural-acoustic coupling characteristics, mechanisms, effect of structural-acoustic coupling on natural mode and natural frequencies of the system are analyzed theoretically and numerically. Formulae for the natural frequencies of the coupled system are derived. Some new conclusions are obtained. Analytical results demonstrate that the strongly coupled system indicates obvious closed-loop feedback characteristics, whereas the weakly coupled system indicates obvious feedforward characteristics, and it is because of the presence of the feedback loop that the natural characteristics and natural frequencies are changed. Cluster coupling characteristic between the structural and acoustic modes for the regular cavity and panel system is found, which determines the coupling interaction between the flexible panel and cavity. Any mode in one mode cluster only interferes the modes and the modal natural frequencies in the same cluster independently. The modal cluster coupling changes not only the natural frequencies of the system but also the modal order and structural mode shape.
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| 关 键 词： | 柔性板围护腔体 结构-声学耦合 声波辐射 理论分析 数值研究 |
| 修稿时间： | 2006-03-282006-05-16 |
Analytical research on structural-acoustic coupling of a cavity surrounded by flexible panel |
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| JIN Guoyong,YANG Tiejun,LIU Zhigang,JI Zhenlin,LI Wanyou. Analytical research on structural-acoustic coupling of a cavity surrounded by flexible panel[J]. Chinese Journal of Acoustics, 2007, 26(2): 138-157 |
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| Authors: | JIN Guoyong YANG Tiejun LIU Zhigang JI Zhenlin LI Wanyou |
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| Abstract: | The structural-acoustic coupling characteristics, mechanisms, effect of structuralacoustic coupling on natural mode and natural frequencies of the system are analyzed the- oretically and numerically. Formulae for the natural frequencies of the coupled system are derived. Some new conclusions are obtained. Analytical results demonstrate that the strongly coupled system indicates obvious closed-loop feedback characteristics, whereas the weakly cou- pled system indicates obvious feedforward characteristics, and it is because of the presence of the feedback loop that the natural characteristics and natural frequencies are changed. Cluster coupling characteristic between the structural and acoustic modes for the regular cavity and panel system is found, which determines the coupling interaction between the flexible panel and cavity. Any mode in one mode cluster only interferes the modes and the modal natural frequencies in the same cluster independently. The modal cluster coupling changes not only the natural frequencies of the system but also the modal order and structural mode shape. |
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