Acoustics, Volume 5, Issue 4
December 2023 - 17 articles
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Cover Story: Computing backscattering of harmonic acoustic waves from arbitrary underwater elastic targets is a problem of considerable practical significance. The finite element method is commonly coupled with the boundary element method, but such models tend to be expensive, due to large, dense, and complex matrices, and the need to solve systems of algebraic equations for each frequency of interest. We developed a model reduction of the surface pressures based on spatial coherence that greatly reduces the size of the systems. We found that the approach delivers acceptable results at a fraction of the cost of the full model. Backscattering computations with considerably larger models than have been feasible to date are now possible. View this paper