Abstract
The bistatic and monostatic numerical calculation of the pressure scattered from structures composed of elastic materials and possibly filled with another material is one of the main purposes for the detection of underwater objects. For this reason, the sound pressure scattered from spherical objects placed in and filled with fluid will be calculated in the frequency domain. The results of an in‐house developed BEM‐package which supports single and multiple fluid‐structure‐interactions will be compared with analytical solutions based on spherical wave functions and with results of commercial BEM/FEM applications. Performance optimizations of the calculation process for the uncoupled rigid and coupled monostatic case as a result of using a parallelized matrix creation and solution with a specific variant of the direct solving process will be presented. We will also compare results for a cubic structure, placed in water above a finite plane boundary, with an equivalent half‐space solution that incorporates a suitable half‐space Green’s function and could be used for fast approximations in the mid‐ and high‐frequency range.
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