Discretization of a Hybrid Model for Acoustic Wave Propagation in Layered Fluid Media

Elena Sundkvist and Kurt Otto

June 2011

Abstract:

The objective is to construct and discretize (to fourth-order accuracy) a hybrid model for waveguide problems, where a finite difference method for inhomogeneous layers is coupled to a boundary element method (BEM) for a set of homogeneous layers. Such a hybrid model is adequate for underwater acoustics in complicated environments. Waveguides with either plane or axial symmetry are treated, which leads to (algebraically) two-dimensional problems. The main focus is on the collocated BEM.

Note: Updated 2011-08-08.

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