AN EFFICIENT 3-DIMENSIONAL BOUNDARY INTEGRAL-EQUATION METHOD FOR SOLVING AZIMUTHALLY SYMMETRICAL SCATTERING PROBLEMS IN THE OCEANIC WAVE-GUIDE

In this paper an efficient boundary integral equation method (BIEM) is presented for the computation of the pressure field scattered from th ree-dimensional bathymetry in an oceanic waveguide. The bathymetry is taken to be azimuthally symmetric about an origin and a rigid boundary condition is used. The source, however, can be located off-axis anywh ere within the waveguide. The azimuthal symmetry of the bathymetry all ows one to solve a sequence of one-dimensional integral equations inst ead of a very large two-dimensional one. To verify the validity of the method, the results from the three-dimensional BIEM code are compared to the results from a radial coupled-mode program.