Effect of the free surface and the rigid plane on structural vibration and acoustic radiation |
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作者姓名: | ZOUYuanjie ZHAODeyou LISheng |
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作者单位: | DeptofNavalArchitecture,DalianUniversityofTechnologyDalian116024 |
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摘 要: | The coupled fluid-structure interaction equation is estabhshed for bodies in the half-space fluid domain, especially sitting on the infinite plane, based on the BEM (Boundary Element Method) theory. Then, the natural frequencies, vibration responses and the acoustic radiation for a box are calculated, and the effect of the free surface and the rigid plane is discussed. Finally, several relative factors including the plate thickness, the structure damping and the distance between the body and the infinite plane are studied. The results show that the effect of the free surface and the rigid plane on the structural natural frequencies, vibration responses and the acoustic radiation cannot be ignored.
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关 键 词: | 声学辐射 边界元理论 结构振动 无限平板 振动响应 固有频率 |
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