Abstract
The farfield backscattered form function is examined for the problem of plane acoustic pressure wave scattering by an empty elastic circular cylindrical shell. The analysis of the exactly computed total form function has been carried out. The approach of finding the contribution introduced by two peripheral Lamb-type waves—the zero-order symmetric S0 and the zero-order antisymmetric A0—is outlined. An approximate description of these contributions is used to synthesize the backscattered form function. The presentation is developed using the case of an Armco iron shell with moderate thickness, immersed in water.
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