Generalized Coupled-Mode Formulation for Sound Propagation in Range-Dependent Waveguides
1 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190
2 Graduate University of Chinese Academy of Sciences, Beijing 100049
Received Date:
September 04, 2011
Revised Date:
December 31, 1899
Published Date:
December 31, 2011
Abstract
An accurate and numerically stable method based on the coupled-mode theory is presented. By applying the direct global matrix approach to obtain the modal expansion coefficients, this method is numerically stable. In addition, appropriately normalized range solutions are introduced, which resolves the overflow problem entirely. Furthermore, we put forward source conditions appropriate for the line-source problem in plane geometry. As a result, this method is capable of dealing with the scenario where a line source is located inside the region of a deformation. Closed-form expressions for coupling matrices are provided for ideal waveguides. Numerical results indicate that the present method is accurate and numerically stable. Consequently, this model can serve as a benchmark in range-dependent propagation modeling.
Article Text
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About This Article
Cite this article:
LUO Wen-Yu, YANG Chun-Mei, ZHANG Ren-He. Generalized Coupled-Mode Formulation for Sound Propagation in Range-Dependent Waveguides[J].
Chin. Phys. Lett. , 2012, 29(1): 014302.
DOI: 10.1088/0256-307X/29/1/014302
LUO Wen-Yu, YANG Chun-Mei, ZHANG Ren-He. Generalized Coupled-Mode Formulation for Sound Propagation in Range-Dependent Waveguides[J]. Chin. Phys. Lett. , 2012, 29(1): 014302. DOI: 10.1088/0256-307X/29/1/014302
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