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On the Method of Source Images for the Wedge Problem Solution in Ocean Acoustics: Some Corrections and Appendices

  • Ocean Acoustics. Hydroacoustics
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Abstract

In this study the method of source images for the problem of sound propagation in a penetrable wedge [G. Deane and M. Buckingham, J. Acoust. Soc. Am. 93 (1993) 1319–1328] is revisited. This solution is very important three-dimensional (3D) benchmark in computational underwater acoustics, since a wedge bounded from above by the sea surface and overlying a sloping penetrable bottom is the simplest model of a shallow-sea waveguide near the coastline. The corrected formulae for the positions of the source images and bottom images are presented together with the explanation of their derivation. The problem of branch choice in the reflection coefficient is thoroughly discussed, and the corresponding explicit formulae are given. In addition, numerical validation of the proposed branch choice schemes and the resulting wedge problem solutions are presented. Finally, source images solution is computed for a series of examples with different ratios of shear and bulk moduli in the bottom. The interplay between the acoustic-elastic waves coupling and the horizontal refraction in the wedge is demonstrated.

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Authors and Affiliations

  1. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin, 150001, China

    Jun Tang & Shengchun Piao

  2. Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin, 150001, China

    Jun Tang & Shengchun Piao

  3. Il’ichev Pacific Oceanological Institute, Vladiostok, 690041, Russia

    P. S. Petrov & S. B. Kozitskiy

  4. Far Eastern Federal University, Vladivostok, 690950, Russia

    P. S. Petrov

Authors
  1. Jun Tang
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  2. P. S. Petrov
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  3. Shengchun Piao
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  4. S. B. Kozitskiy
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Corresponding author

Correspondence to Jun Tang.

Additional information

Published in Russian in Akusticheskii Zhurnal, 2018, Vol. 64, No. 2, pp. 228–240.

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Tang, J., Petrov, P.S., Piao, S. et al. On the Method of Source Images for the Wedge Problem Solution in Ocean Acoustics: Some Corrections and Appendices. Acoust. Phys. 64, 225–236 (2018). https://doi.org/10.1134/S1063771018020070

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  • DOI: https://doi.org/10.1134/S1063771018020070

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