Scattering in a shallow water waveguide

Abstract

The bistatic scattering from an elastic target in a shallow-water waveguide with a rigid bottom was discussed at a previous meeting of the society [G. S. Sammelmann and R. H. Hackman, J. Acoust. Soc. Am. Suppl. 1 82, S49 (1987)]. One emphasis of this work was the effect of modal dispersion and the strong elastic signature of the flexural resonances on the scattered waveform. Here, an extension of the model to realistic bottoms is given. In particular, the effects of bottom structure on the time domain structure of the scattered signal are discussed and the generation and propagation of interface waves and the scattering of such waves by a target in the waveguide are considered.