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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Hybrid FEM-SBM solver for structural vibration induced underwater acoustic radiation in shallow marine environment
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Hybrid FEM-SBM solver for structural vibration induced underwater acoustic radiation in shallow marine environment

机译：用于结构振动的混合FEM-SBM求解器在浅海洋环境中诱导水下声学辐射

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摘要

This study focuses on the efficient computational model for predicting the structural vibration induced underwater acoustic radiation in shallow marine environment. In the proposed model, the finite element method (FEM) is used to calculate the vibration response of the shell structures and the singular boundary method (SBM) with near-field and far-field Green's functions is used to simulate the underwater acoustic radiation excited by shell structural vibration in shallow water marine environment, namely, the hybrid FEM-SBM solver. For axisymmetric shell structures, the axisymmetric numerical formulation of the FEM-SBM solver is derived to save the computational cost. For general shell structures, the fast direct solver based on the recursive skeletonization factorization is introduced into the FEM-SBM solver to accelerate the computation of the underwater acoustic field. Numerical results demonstrate that the proposed FEM-SBM solver provides more efficient and reliable solutions in comparison with the coupled FEM/FEM solver (COMSOL software). The effect of the sound velocity profiles on the underwater acoustic radiation field in shallow water marine environment is numerically investigated. (C) 2020 ElsevierB.V. All rights reserved.
机译：本研究重点研究了预测结构振动诱导的浅海环境下水下声辐射的有效计算模型。在所提出的模型中，有限元方法（FEM）用于计算壳体结构的振动响应和具有近场和远场功能的奇异边界法（SBM）用于模拟兴奋的水下声辐射通过壳体结构振动在浅水海洋环境下，即混合FEM-SBM求解器。对于轴对称壳结构，导出了FEM-SBM解器的轴对称数值配方，以节省计算成本。对于一般壳结构，基于递归骨架化分解的快速直接求解器被引入FEM-SBM求解器，以加速水下声场的计算。数值结果表明，与耦合的UP / FEM求解器（COMSOL软件）相比，所提出的FEM-SBM求解器提供更有效和可靠的解决方案。数值研究了在浅水海洋环境中水下声学辐射场上的声速谱对浅水辐射场的影响。 （c）2020 elsevierb.v。版权所有。

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