ASA 130th Meeting - St. Louis, MO - 1995 Nov 27 .. Dec 01

2pSA3. Scattering by objects at fluid/solid interfaces.

R. V. Craster

Dept. of Theoretical Mechanics, Univ. of Nottingham, Nottingham NG7 2RD, UK

Canonical diffraction and scattering problems involving fluid/elastic solid interfaces are solved exactly using the Wiener--Hopf technique; the farfield directivities are explicitly identified. When fluid loading is light, there are regions of nonuniform behavior and intense beam formation that occur. In addition, an heuristic method is devised that partly decouples the fluid and solid responses. This leads to accurate results in the light fluid loading limit and allows one to utilize some results directly from elastodynamic problems solved when the fluid is absent.