scholarly journals A coupled-mode method for sound propagation with multiple sources in range-dependent waveguides

2015 ◽  
Vol 45 (1) ◽  
pp. 014301-014301
Author(s):  
WenYu LUO ◽  
RenHe ZHANG ◽  
JiXing QIN ◽  
ChunMei YANG
Keyword(s):  
Sound Propagation ◽  
Multiple Sources ◽  
Coupled Mode ◽  
Mode Method

scholarly journals A coupled-mode method for sound propagation in a range-dependent penetrable waveguide

2013 ◽  
Vol 62 (9) ◽  
pp. 094302
Author(s):  
Yang Chun-Mei ◽  
Luo Wen-Yu ◽  
Zhang Ren-He ◽  
Qin Ji-Xing
Keyword(s):  
Sound Propagation ◽  
Coupled Mode ◽  
Mode Method

scholarly journals Coupled Mode Sound Propagation in Inhomogeneous Stratified Waveguides

2021 ◽  
Vol 11 (9) ◽  
pp. 3957
Author(s):  
Juan Liu ◽  
Qi Li
Keyword(s):  
Differential Equations ◽  
Sound Propagation ◽  
Computational Cost ◽  
Acoustic Medium ◽  
Acoustic Fields ◽  
Local Modes ◽  
Finite Element Software ◽  
Coupled Mode ◽  
Mode Method ◽  
Admittance Method

An efficient coupled mode method for modeling sound propagation in horizontally stratified inhomogeneous waveguides, in which the seabed is modeled as a (layered) acoustic medium, is presented. The method is based on Fawcett’s coupled mode method and the multimodal admittance method. The acoustic field is expanded onto the unusual local eigenfunctions composed by normal modes in the corresponding one-layer homogeneous waveguides with constant depth equal to the local total depth of the multilayered waveguide. A set of energy-conserving first-order differential equations governing the modal amplitudes of acoustic fields is derived. The admittance method is employed to solve the differential equations in a numerically stable manna. The coupled mode method considers the backscattering effect of inhomogeneities and full coupling between local modes, and offers improvement from the viewpoint of efficiency and computational cost. The acoustic fields predicted by the method agree well with those computed by the commercial finite element software COMSOL Multiphysics. The method can be extended to further establish fast and accurate 3D sound propagation models in complex shallow water environments.

COUPLED MODE AND FINITE ELEMENT APPROXIMATIONS OF UNDERWATER SOUND PROPAGATION PROBLEMS IN GENERAL STRATIFIED ENVIRONMENTS

2008 ◽  
Vol 16 (01) ◽  
pp. 83-116 ◽  
Author(s):  
G. A. ATHANASSOULIS ◽  
K. A. BELIBASSAKIS ◽  
D. A. MITSOUDIS ◽  
N. A. KAMPANIS ◽  
V. A. DOUGALIS
Keyword(s):  
Finite Element ◽  
Sound Propagation ◽  
Test Problems ◽  
Underwater Sound ◽  
Finite Element Approximations ◽  
Coupled Mode ◽  
Cylindrically Symmetric ◽  
Mode Method ◽  
Acoustic Waveguides ◽  
Good Agreement

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.

scholarly journals A coupled-mode method for sound propagation in range-dependent waveguides

2021 ◽  
Vol 70 (6) ◽  
pp. 064301-064301
Author(s):  
Liu Juan ◽  
◽  
Li Qi ◽  
◽  
Keyword(s):  
Sound Propagation ◽  
Coupled Mode ◽  
Mode Method

Efficient Modal Analysis of Bianisotropic Waveguides by the Coupled Mode Method

2007 ◽  
Vol 55 (1) ◽  
pp. 108-116 ◽  
Author(s):  
Jaime Pitarch ◽  
Jos M. Catala-Civera ◽  
Felipe L. Penaranda-Foix ◽  
Miguel A. Solano
Keyword(s):  
Modal Analysis ◽  
Coupled Mode ◽  
Mode Method

Erratum: Electromagnetic propagation in unbounded inhomogeneous chiral media using the coupled mode method

2008 ◽  
Vol 50 (4) ◽  
pp. 1132-1132
Author(s):  
Álvaro Gómez ◽  
Ismael Barba ◽  
Ana C. L. Cabeceira ◽  
José Represa ◽  
Angel Vegas ◽  
...  
Keyword(s):  
Chiral Media ◽  
Electromagnetic Propagation ◽  
Coupled Mode ◽  
Mode Method

New formulation of the coupled mode method for the analysis of chirowaveguides

2002 ◽  
Author(s):  
Alvaro Gomez ◽  
Miguel Angel Solano ◽  
Angel Vegas
Keyword(s):  
Coupled Mode ◽  
Mode Method ◽  
New Formulation

A two-way coupled mode simulation of sound propagation in a shallow water wedge

2002 ◽  
Vol 111 (5) ◽  
pp. 2387 ◽  
Author(s):  
T. W. Yudichak ◽  
D. P. Knobles ◽  
R. A. Koch
Keyword(s):  
Shallow Water ◽  
Sound Propagation ◽  
Coupled Mode
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