On the Application of Asymptotic Formulae Based on the Modified Maslov Canonical Operator to the Modeling of Acoustic Pulses Propagation in Three-Dimensional Shallow-Water Waveguides
- Авторы: Petrov P.1, Sergeev S.2,3, Tolchennikov A.2,3,4
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Учреждения:
- Il’ichev Pacific Oceanological Institute, Far Eastern Branch, Russian Academy of Sciences
- Ishlinsky Institute of Problems in Mechanics, Russian Academy of Sciences
- Moscow Institute of Physics and Technology (National Research University)
- Lomonosov Moscow State University
- Выпуск: Том 65, № 6 (2019)
- Страницы: 716-723
- Раздел: Ocean Acoustics. Hydroacoustics
- URL: https://journals.rcsi.science/1063-7710/article/view/187031
- DOI: https://doi.org/10.1134/S1063771019060113
- ID: 187031
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Аннотация
In this study a technique for the modeling of propagation of acoustic pulses in shallow-water waveguides with three-dimensional bottom inhomogeneities is described. The described approach is based on the ray theory of sound propagation and the method of modified Maslov canonical operator. Representation of acoustical field in terms of the canonical operator gives several important advantages in practical computations. In particular, it is possible to compute the time series of a pulse at a reception point located on the caustics of a family of rays. Besides, a significant part of calculations within the proposed approach can be performed analytically; therefore, overall computational costs are substantially reduced. As an example, sound propagation in a wedge-shaped waveguide representing a shelf area near the coast line is considered. The ray geometry in such a waveguide is discussed both in the isovelocity case and in the presence of the thermocline in the water column. For both cases, the time series of an acoustical pulse propagating along the track aligned along the isobaths (parallel to the apex edge of the wedge) is calculated.
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Об авторах
P. Petrov
Il’ichev Pacific Oceanological Institute, Far Eastern Branch, Russian Academy of Sciences
Автор, ответственный за переписку.
Email: petrov@poi.dvo.ru
Россия, Vladivostok, 690041
S. Sergeev
Ishlinsky Institute of Problems in Mechanics, Russian Academy of Sciences; Moscow Institute of Physics and Technology (National Research University)
Автор, ответственный за переписку.
Email: sergeevse1@yandex.ru
Россия, Moscow, 119526; Dolgoprudny, Moscow region, 141701
A. Tolchennikov
Ishlinsky Institute of Problems in Mechanics, Russian Academy of Sciences; Moscow Institute of Physics and Technology (National Research University); Lomonosov Moscow State University
Автор, ответственный за переписку.
Email: tolchennikovaa@gmail.com
Россия, Moscow, 119526; Dolgoprudny, Moscow region, 141701; Moscow, 119991