An energy-conserving one-way coupled mode propagation model

2002 ◽  
Vol 111 (1) ◽  
pp. 160-167 ◽  
Author(s):  
Ahmad T. Abawi
Keyword(s):  
Propagation Model ◽  
Mode Propagation ◽  
Coupled Mode ◽  
Energy Conserving

Coupled Mode Propagation in Elastic Media

2007 ◽  
Author(s):  
Ahmad T. Abawi ◽  
Michael B. Porter
Keyword(s):  
Elastic Media ◽  
Mode Propagation ◽  
Coupled Mode

Analysis of shallow-water experimental acoustic data including a comparison with a broad-band normal-mode-propagation model

2001 ◽  
Vol 26 (3) ◽  
pp. 308-323 ◽  
Author(s):  
D.G. Simons ◽  
R. McHugh ◽  
M. Snellen ◽  
N.H. McCormick ◽  
E.A. Lawson
Keyword(s):  
Shallow Water ◽  
Normal Mode ◽  
Broad Band ◽  
Propagation Model ◽  
Mode Propagation ◽  
Acoustic Data

INTEGRAL EQUATION COUPLED MODE APPROACH APPLIED TO INTERNAL WAVE PROBLEMS

2001 ◽  
Vol 09 (01) ◽  
pp. 149-167 ◽  
Author(s):  
D. P. KNOBLES ◽  
S. A. STOTTS ◽  
R. A. KOCH ◽  
T. UDAGAWA
Keyword(s):  
Integral Equation ◽  
Internal Wave ◽  
Integral Equations ◽  
Sound Propagation ◽  
Integral Equation Method ◽  
Coupled Equations ◽  
Coupled Mode ◽  
Energy Conserving ◽  
Linear Internal Wave ◽  
Wave Problems

A two-way coupled mode approach based on an integral equation formalism is applied to sound propagation through internal wave fields defined at the 1999 Shallow Water Acoustics Modeling Workshop. Solutions of the coupled equations are obtained using a powerful approach originally introduced in nuclear theory and also used to solve simple nonseparable problems in underwater acoustics. The basic integral equations are slightly modified to permit a Lanczos expansion to form a solution. The solution of the original set of integral equations is then easily recovered from the solution of the modified equations. Two important aspects of the integral equation method are revealed. First, the Lanczos expansion converges faster than a Born expansion of the original integral equations. Second, even when the Born expansion diverges due to strong mode coupling, the Lanczos expansion converges. It is shown that the internal wave problems examined are essentially one-way propagation problems because one observes good agreement between the coupled mode solutions and those provided by an energy-conserving parabolic equation algorithm. In the Workshop examples, at both 25 and 250 Hz, significantly greater coupling between modes occurs in the linear internal wave field case than the nonlinear soliton case.

Forward coupled‐mode propagation modeling for coastal acoustic tomography

1996 ◽  
Vol 99 (2) ◽  
pp. 793-802 ◽  
Author(s):  
Ching‐Sang Chiu ◽  
James H. Miller ◽  
James F. Lynch
Keyword(s):  
Acoustic Tomography ◽  
Mode Propagation ◽  
Propagation Modeling ◽  
Coupled Mode
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