Abstract

This paper discusses a ray approach to analyze wave scattering by fluid-loaded targets (submarinelike structures). The approach consists of the following four elements: (1) modal analysis in separable structures (e.g., flat plate, cylindrical shell, spherical shell, etc.); (2) coupling of plate and shell modes at joints; (3) ray asymptotics and spectral approaches for separable structures; and (4) combination of the results in (2) and (3) for nonseparable structures. The model consisting of a cylindrical pipe with hemispherical endcaps, a bulk head and an internal rib, have been considered. Some computed results are compared with experimental data derived by a tank test at the NUSC facility using Mark 0 model. [Work supported by ONR.]

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