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. DOI: 10.3969/j.issn.1673-3185.2007.02.003
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. DOI: 10.3969/j.issn.1673-3185.2007.02.003
Liu Lianhai, Hong Ming, Guo Xinyi. Characteristics of Hydrodynamic and Acoustic Radiation of Damaged Stiffened Plate in Water[J]. Chinese Journal of Ship Research, 2007, 2(2): 9-14. DOI: 10.3969/j.issn.1673-3185.2007.02.003
Citation: Liu Lianhai, Hong Ming, Guo Xinyi. Characteristics of Hydrodynamic and Acoustic Radiation of Damaged Stiffened Plate in Water[J]. Chinese Journal of Ship Research, 2007, 2(2): 9-14. DOI: 10.3969/j.issn.1673-3185.2007.02.003

含损伤加筋结构流固耦合动力特性与声辐射特性研究

Characteristics of Hydrodynamic and Acoustic Radiation of Damaged Stiffened Plate in Water

  • 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。

     

    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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