Coupled-Mode Parabolic Equations for the Modeling of Sound Propagation in a Shallow-Water Waveguide with Weak Elastic Bottom
Abstract
:1. Introduction
2. Basic Equations and Expansions
3. WKB Solutions for Shear Waves
4. Interface Conditions
5. Boundary Conditions
6. Elastic Mode Parabolic Equations (EMPE)
7. Initial-Boundary Value Problem for the System of Elastic Mode Parabolic Equations
8. Numerical Examples
9. Discussion
10. Conclusions
- The proposed method is numerically validated. The test calculations carried out for the ASA wedge benchmark prove to be in excellent agreement with the source image method [14] for shear wave speeds up to 300 m/s at the bottom and a rather good agreement of up to 400 m/s.
- We have developed the software package [32] for the modeling of sound propagation in 3D waveguides based on the derived equations.
- This software package has been successfully used to plan and analyze the results of the acoustic experiments on the propagation of sound in a shallow sea [33].
Funding
Institutional Review Board Statement
Data Availability Statement
Conflicts of Interest
Appendix A. Derivation of the Main Ansatz
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Kozitskiy, S. Coupled-Mode Parabolic Equations for the Modeling of Sound Propagation in a Shallow-Water Waveguide with Weak Elastic Bottom. J. Mar. Sci. Eng. 2022, 10, 1355. https://doi.org/10.3390/jmse10101355
Kozitskiy S. Coupled-Mode Parabolic Equations for the Modeling of Sound Propagation in a Shallow-Water Waveguide with Weak Elastic Bottom. Journal of Marine Science and Engineering. 2022; 10(10):1355. https://doi.org/10.3390/jmse10101355
Chicago/Turabian StyleKozitskiy, Sergey. 2022. "Coupled-Mode Parabolic Equations for the Modeling of Sound Propagation in a Shallow-Water Waveguide with Weak Elastic Bottom" Journal of Marine Science and Engineering 10, no. 10: 1355. https://doi.org/10.3390/jmse10101355