| 含损伤加筋结构流固耦合动力特性与声辐射特性研究 |
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| 引用本文： | 刘连海,洪明,郭新毅.含损伤加筋结构流固耦合动力特性与声辐射特性研究[J].中国舰船研究,2007,2(2):9-14. |
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| 作者姓名： | 刘连海 洪明 郭新毅 |
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| 作者单位： | 1. 大连理工大学船舶工程系,辽宁,大连,116023
2. 中国科学院声学研究所,北京,100080 |
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| 摘 要： | 采用有限元／边界元（FEM／BEM）方法对于水下典型加筋板结构的动力特性以及声辐射特性进行研究。首先将损伤的概念引入有限元，并用边界元法得到流体附加质量项，然后求解损伤结构动力特性，进而求出损伤结构在一定频率范围激励下的辐射声功率以及辐射指向性。
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| 关 键 词： | 流固耦合 传递函数 辐射声功率 辐射指向性 |
| 文章编号： | 1673-3185（2007）02-09-06 |
| 修稿时间： | 2006-09-14 |
Characteristics of Hydrodynamic and Acoustic Radiation of Damaged Stiffened Plate in Water |
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| Liu Lian-hai,Hong Ming,Guo Xin-yi.Characteristics of Hydrodynamic and Acoustic Radiation of Damaged Stiffened Plate in Water[J].Chinese Journal of Ship Research,2007,2(2):9-14. |
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| Authors: | Liu Lian-hai Hong Ming Guo Xin-yi |
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| Institution: | 1 Dept. of Nav. Architecture, Dalian Univ. of Tech. , Dalian l16023,China; 2 Institute of Acoustics, the Chinese Academy of Sciences, Beijing 100080,China |
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| Abstract: | The characteristics of hydrodynamic and acoustic radiation of damaged stiffened plate in water were studied using FEM/BEM methods. The concept of damage was incorporated in the FEM method when forming the stiffness matrix of stiffened plate model. The effect of fluid on the structure was considered to be the added mass matrix. The damaged structure was calculated in terms of natural frequency, vibration model and transfer function. Furthermore, the radiation power and radiation directivity was computed over a special frequency range. |
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| Keywords: | fluid-structure coupling transfer function radiation power radiation directivity |
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