This paper makes the first attempt to propose a novel hybrid collocation solver based on the generalized finite difference method (GFDM) and singular boundary method (SBM) to analyze underwater acoustic radiation and propagation around the thin plate structures excited by simple harmonic force under shallow sea environment. In the proposed hybrid solver, the meshless GFDM is employed to obtain the fluid–structure coupling vibration response of thin plate structure, and then the SBM with Pekeris waveguide Green function is used to calculate the external acoustic field of thin plate structure. The simplified Price–Wu boundary condition is adopted on the surface of plate structure to connect the computational domains between the GFDM and SBM. Three benchmark examples are carried out to demonstrate the accuracy and efficiency of the proposed hybrid GFDM–SBM solver in comparison with the COMSOL simulation for computing underwater acoustic wave fields around the thin plate structures under shallow sea environment.

中文翻译：

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浅海环境下薄板结构声辐射与传播的混合GFDM-SBM求解器

本文首次尝试提出一种基于广义有限差分法（GFDM）和奇异边界法（SBM）的新型混合配置求解器，用于分析浅海简谐力激发的薄板结构周围的水声辐射和传播。环境。在所提出的混合求解器中，采用无网格 GFDM 获得薄板结构的流固耦合振动响应，然后使用带有 Pekeris 波导格林函数的 SBM 计算薄板结构的外声场。在板结构表面采用简化的 Price-Wu 边界条件来连接 GFDM 和 SBM 之间的计算域。