Analysis of underwater acoustic propagation induced by structural vibration in arctic ocean environment based on hybrid FEM-WSM solver

Abstract

This paper investigates the underwater acoustic propagation characteristics induced by structural vibrations in the arctic ocean environment. For this purpose, a hybrid solver based on the finite element method (FEM) and the wave superposition method (WSM) is proposed. Leveraging the unique strengths of each method, the FEM is employed to perform structural-acoustic coupling analysis, while the WSM is used to analyze underwater acoustic propagation in the arctic ocean environment. In addition, the truncated singular value decomposition (TSVD) technique is introduced to mitigate the ill-conditioned effects of the Green's function matrix provided by the WSM. Numerical results demonstrate the accuracy and efficiency of the proposed solver in comparison to COMSOL Multiphysics finite element analysis software. Furthermore, the influence of sound speed stratification and ice layer thickness on the underwater acoustic propagation characteristics is numerically investigated in detail. These findings may provide valuable insights for the application of underwater acoustic communication and ocean exploration in the Arctic region.