深水中复合材料椭圆柱壳声辐射的数值分析

用有限元／边界元法分析深水中复合材料椭圆柱壳的声辐射．首先利用有限元分析壳体的受迫振动，然后提取壳体表面（耦合面）数据，作为声场分析的边界条件，并计及流-固耦合作用，从而可用边界元计算壳体的辐射功率以及壳体表面、近场和远场声压，结果表明系统的耦合振动模态对于其辐射声场具有重要影响．

Numerical analysis of acoustic radiation by composite elliptic cylindrical shell submerged in deep water

Acoustic radiation was calculated from laminated composite elliptic cylindrical shell submerged in deep water by finite element and boundary element methods. The forced vibration of the shell excited by a point harmonic load was analyzed by FEM. The mesh element information and normal displacement of the coupling surface were drawn as the boundary condition of the BEM model, and the radiation sound power and the sound pressures in near and far sound fields were given. Numerical results show that the coupling vibration modes of the system could affect vibroacoustic radia- tion considerably.