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1)  vibration and sound radiation
振动和声辐射
1.
The effects of six driving forces on vibration and sound radiation from a finite stiffened double cylindrical shell covered with layers are studied.
研究了不同激励力对流场中敷设阻尼材料的有限长加筋双层圆柱壳的振动和声辐射性能的影响。
2.
The distinctions of vibration and sound radiation characteristics of the inner and outer shells with three connected types of shells(without connected component,splint connected and annular plate connected) are compared using analytic method,and the revised value of sound-vibration characteristics of the double cylindrical shells is resolved based on the inner shell.
用解析法研究了三种壳间连接形式(无连接构件、托板或实肋板连接)的双层圆柱壳的内、外壳振动和声辐射性能的差别,并求出了以内壳为基准的双层壳声振性能的修正值。
2)  Vibration and sound field
振动和辐射声场
3)  vibration and sound radiation experiment
振动和声辐射试验
4)  vibration and acoustic radiation
振动声辐射
5)  structural_acoustic system
结构振动声辐射
6)  vibration and acoustic radiation
振动与声辐射
1.
The effects of structural parameters,such as mass,damping,and the number of absorbers on the vibration and acoustic radiation of underwater structures were discussed.
以带有推进轴系的单层锥柱结合壳体为研究对象,用FEM/BEM方法计算轴系纵振激励导致的结构水下振动与声辐射响应。
补充资料:点振子振动和点电极振子振动
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性质:又称点振子振动和点电极振子振动。振动能量绝大部分集中在点电极范围内,形成“能量封闭”的振动模式。振子电极面远小于压电陶瓷片的总面积,且与厚度有适宜的匹配关系。在交变电场作用下,沿厚度方向产生振动,其振幅随着至电极中心距离的增加,呈指数式衰减。谐振频率与压电陶瓷片的厚度有关。为提高频率通常将压电陶瓷片磨得很薄,有时考虑到压电陶瓷自身强度太低,可用特制的陶瓷片作垫片来防止压电陶瓷片损坏。常用于高频场合。

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