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A Vibro-Acoustic Study on Structures in Shallow Water
Author(s): ZOU Yuanjie, ZHAO Deyou
Pages: 269-
274
Year: 2004
Issue:
3
Journal: JOURNAL OF VIBRATION ENGINEERING
Keyword: 声辐射; 流固耦合; 浅水; 有限元法; 边界元法;
Abstract: 建立了浅水域声学边界元方程和相应的有限元/边界元流固耦合振动方程,探讨了水深对结构振动固有频率、振动响应和声辐射的影响.研究结果表明:水深变化对结构固有频率有影响,随着水深减小,结构固有频率降低,特别是当水深与结构浸深接近时,各阶固有频率大大降低,且振型顺序也可能发生变化;水深变化对结构振动响应和声辐射均有影响,其中对声辐射特性的影响较为复杂,即使水深超过结构浸深的10倍,水深变化也会影响到结构的声辐射功率级.
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