Abstract
We develop the exact analytical model required to computationally study the transmission of incident acoustic energy into submerged elastic cylindrical shells subjected to arbitrary loads on their outer surface. This basic model uses the exact formulation of linear elastodynamics to describe the shell motions, and that of general linear acoustics to describe the wave motion in the inner and outer fluids. Hence, for this linear problem the superposition principle permits the separation of the contribution to the internally transmitted field caused by the incident wave, from those caused by the surface load. We compute and display isobaric contours of the internally transmitted pressure field exhibiting its caustics and their progressive development as the frequency is increased within the bad 0 ⩽ k3 ⩽ 10. The contour plots are generated for all possible combinations of loading and insonification conditions, and in all cases we compute an advantage ratio PR. This ratio measures the gain that would result fr...
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