A Spectral Method for Two-Dimensional Ocean Acoustic Propagation

The accurate calculation of the sound field is one most concerning issues in hydroacoustics. one-dimensional spectral method has been used to correctly solve simplified underwater acoustic propagation models, but it difficult actual ocean fields using this model due its application conditions and approximation error. Therefore, necessary develop a direct solution for two-dimensional Helmholtz equation without models. Here, two commonly methods, Chebyshev–Galerkin Chebyshev–collocation, are equation. Since Chebyshev–collocation does not require harsh boundary equation, then propagation. numerical results compared with analytical solutions verify correctness method. Compared mature Kraken program, exhibits higher accuracy. can be directly representative Because there no constraints, wide range applications provides high accuracy, which great significance realistic fields.