A High-Fidelity Computational Framework for Multiphysics Acoustic Wave Propagation Using FEM–BEM Coupling

Abstract

The acoustic wave propagation of the complex engineering systems with unbounded domains and coupled physical interactions requires numerical modelling in high-fidelity to capture the sound radiations and scattering effects in an accurate way. Lone application of either conventional finite element or whether as a boundary element method has inherent drawbacks: artificial truncation of boundaries, lack of accuracy in exterior domains or lack of Multiphysics coupling. The current paper aims at outlining a high-fidelity computational paradigm to tackle these issues in the form of a coupled finite element-boundary element (FEM-BEM) framework of Multiphysics acoustic wave propagation. The modelling in the proposed method suggests that finite element method can be used to model interior and structurally coupled acoustic domains, and boundary element method is used to model unbounded exterior acoustic regions in a way that ensures that interface continuity conditions are enforced by a robust coupling strategy. The structure can capture the effects of acoustic-structure interaction and is able to do frequency-domain analysis as well as transient analysis. Numerical experiments related to benchmark problems as well as Multiphysics acoustic problems indicate that the proposed FEMBEM framework leads to much better accuracy and numerical stability, than standalone FEM or BEM techniques, in addition to being as computationally efficient. The findings prove the efficiency of the suggested approach in solving the complicated wave issues and its feasibility to address the advanced acoustic engineering problems, including the vibro-acoustic systems, underwater acoustics, and noise control practises.