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首页> 外文期刊>Engineering analysis with boundary elements >Study of integrated calculation method of fluid-structure coupling vibrations, acoustic radiation, and propagation for axisymmetric structures in ocean acoustic environment
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Study of integrated calculation method of fluid-structure coupling vibrations, acoustic radiation, and propagation for axisymmetric structures in ocean acoustic environment

机译：海洋声环境下轴对称结构流固耦合振动，声辐射与传播综合计算方法研究

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摘要

Based on a combination of the finite element method and wave superposition method (FEM-WSM), an integrated calculation method of fluid-structure coupling vibrations, acoustic radiation, and propagation for axisymmetric structures in ocean acoustic environments is proposed. The FEM was applied to study the dry mode of axisymmetric structures in a vacuum, and WSM was used to consider the fluid-structure interaction effects and calculate the acoustic radiation field in ocean acoustic environments. The method proposed combines the advantages of FEM and WSM. This method is suited for complex or large axisymmetric structures. Furthermore, it is more efficient than FEM, and the calculation range of the water is not limited. To simplify the calculation, the Green's functions corresponding to the propagation of specific ocean environments were calculated differently in the near and far fields. Using spherical and elliptical axisymmetric shells as examples, the results from the method proposed and COMSOL were compared to verify the correctness of the proposed model. In the calculation of the acoustic radiation field, the numerical errors from matrices, including partial derivatives of the Green's function with huge condition numbers, required the use Tikhonov regularization, and the efficiency was not influenced.
机译：结合有限元法和波叠加法（FEM-WSM），提出了海洋声环境下轴对称结构流固耦合振动，声辐射和传播的综合计算方法。有限元法用于研究轴对称结构在真空中的干燥模式，而WSM则用于考虑流固耦合效应并计算海洋声环境中的声辐射场。所提出的方法结合了FEM和WSM的优点。此方法适用于复杂或大型轴对称结构。此外，它比FEM更有效，并且水的计算范围不受限制。为了简化计算，在近场和远场中对与特定海洋环境的传播相对应的格林函数进行了不同的计算。以球形和椭圆形轴对称壳为例，比较了所提出的方法和COMSOL的结果，以验证所提出模型的正确性。在声辐射场的计算中，来自矩阵的数值误差（包括具有大量条件数的格林函数的偏导数）需要使用Tikhonov正则化，而效率没有受到影响。

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