基于FEM_BEM法的内部声激励水下圆柱壳声辐射计算.pdf

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第 2卷第 6期中国舰船研究 Vol. 2 No. 6
2007年 12月 Chinese Journal of Ship Research Dec. 2007
基于 FEM /BEM法的内部声激励
水下圆柱壳声辐射计算
陈美霞邱昌林骆东平
华中科技大学交通科学与工程学院,湖北武汉 430074
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摘要: 联合有限元法和边界元法对流场中的圆柱壳点声源激励下的声辐射作了数值计算。利用有限元软
件 ANSYS分析了加筋圆柱壳的模态,然后将模态导入采用边界元软件 SYSNO ISE,计算了加筋圆柱壳结构在
点源激励下的声辐射,预报了圆柱壳的内外场声压,得到了圆柱壳的声辐射功率曲线。
关键词: 加筋圆柱壳; 声辐射; 有限元; 边界元
中图分类号: U661. 4 文献标识码: A 文章编号: 1673 - 3185 (2007) 06 - 50 - 05
Sound Rad ia tion Ana lysis of Subm erged Cylindr ica l Shell
Exc ited by In ter ior Po in t Source Ba sed on FEM /BEM
Chen M ei xia Q iu Chang lin L uo D ong ping
College of Science and Engineering, Huazhong Univ. of Sci. & Tech. , W uhan 430074, China)
Abstract: Numerical analysis of sound radiation from a submerged cylindrical shell excited by interi
or point source has been carried out by FEM /BEM. The modes of stiffened shells are calculated by
ANSYS. A numerical analysis of sound radiation of stiffened shell excited by interior point source is
performed by incorporating the modes into the SYSNO ISE, and p redictions of the sound p ressure
both in side and out side of the shell are made, and the curve of sound power is obtained as well.
Key words: stiffened cylindrical shell; sound radiation; FEM; BEM
1 引言结构模态的正交性将方程解耦。本文提出了联合
有限元软件 ANSYS和边界元软件 SYSNO ISE近
环肋圆柱壳是潜艇耐压壳体的主要结构,潜
似预报点声源激励下水中圆柱壳声辐射的数值
艇内部的机械设备常以两种形式的激励壳体振动
方法。
形成水下辐射噪声:一是机械振动