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Citation:
　Natalie S. Grigorieva,Fiodor F. Legusha,Kirill S. Safronov.Computing the Far-Field Scattered by a Spherical Target Near the Seabed[J].Journal of Marine Science and Application,2025,(5):1019-1026.[doi:10.1007/s11804-024-00501-7]
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Computing the Far-Field Scattered by a Spherical Target Near the Seabed

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Title:
Computing the Far-Field Scattered by a Spherical Target Near the Seabed
Author(s):
Natalie S. Grigorieva;  Fiodor F. Legusha;  Kirill S. Safronov
Affilations:
Author(s):
Natalie S. Grigorieva;  Fiodor F. Legusha;  Kirill S. Safronov
Saint Petersburg State Marine Technical Department, University of Physics, Saint Petersburg, 190121, Russia
Keywords:
Scattering of acoustic waves|Spherical scatterer|Attenuating liquid bottom|Later wave|Target strength
分类号:
-
DOI:
10.1007/s11804-024-00501-7
Abstract:
This study proposes a numerically efficient technique for computing the far-field scattered by a spherical target placed near the seabed. The bottom is supposed to be a homogeneous liquid attenuating half-space. The transmitter and receiver are situated at different points of a homogeneous water half-space. The distances between the transmitter, receiver, and object of interest are assumed to be much larger than the acoustic wavelength in water. The scattered far-field is ascertained using Hackman and Sammelmann’s general approach. The arising scattering coefficients of a sphere are assessed using the steepest descent approach. The branch cut contribution is also considered. The obtained formulas for the form-function can be used for acoustically rigid or soft scatterers, as well as elastic targets or spherical elastic shells. Numerical simulations are conducted for an acoustically rigid sphere. Asymptotic expressions for the scattering coefficients allow a decrease in the number of summands in the formula for the target strength and a significant reduction in computational time.

References:

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Memo

Memo:
Received date:2024-3-27;Accepted date:2024-7-30。<br>Foundation item:Supported by the Ministry of Science and Higher Education of the Russian Federation as a part of World-class Research Center Program: Advanced Digital Technologies (contract No. 075-15-2022-312 dated 20 April 2022).<br>Corresponding author:Kirill S. Safronov,E-mail:safronov.kirill.pm@gmail.com
Last Update: 2025-10-24