Journal of Computational Acoustics · 2008 · 38 citations · 16 references
Natural SciencesOcean EngineeringOceanographyAcousticsFinite Element MethodsUnderwater AcousticsAcoustic ScatteringAcoustic Wave PropagationFinite Element AcousticsNumerical AcousticsShallow-water AcousticsUnderwater Sound PropagationAcoustic Propagation ModelingAcoustic WaveguidesCoupled-mode AnalysisCoupled-mode TheoryFinite Element Methods In AcousticsMode TheoryStratified Ocean AcousticsUnderwater Acoustic Waveguides
We compare the results of a coupled mode method with those of a finite element method and also of COUPLE on two test problems of sound propagation and scattering in cylindrically symmetric, underwater, multilayered acoustic waveguides with range-dependent interface topographies. We observe, in general, very good agreement between the results of the three codes. In some cases in which the frequency of the harmonic point source is such that an eigenvalue of the local vertical problem remains small in magnitude and changes sign several times in the vicinity of the interface nonhomogeneity, the discrepancies between the results of the three codes increase, but remain small in absolute terms.
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F. B. Jensen, W. A. Kuperman, M.B. Porter et al. · Computers in Physics · 1995 · 938 citations · Full text