Integration of numerical scattering functions with the ocean wave‐guide

Abstract

Based on the generalized modal formulation of acoustic scattering by F. Ingenito [J. Acoust. Soc. Am. 82, 2051–2059 (1987)] in a stratified ocean, we present a method for integrating a numerical scattering function obtained from a commercial boundary element code, sysnoise, with an acoustic propagation code to study scattering from arbitrary objects. We benchmarked the hybrid method by comparing the scattered fields for a rigid spherical shell obtained using this approach with an analytical solution. We discuss issues related to the numerical implementation of the approach, such as the extraction of the scattering function for an unbounded ocean medium, correct extraction of multiple modal scattering kernal using a single scattering function (for axis‐symmetrical object) and numerical phase compensation procedures associated with numerical source location. The methodology developed here would allow the study of acoustic scattering problems in the ocean for arbitrary‐shaped elastic objects, which are not a...