- Tytuł:
- Diffraction of sound pulses on a spherical target in an oceanic waveguide covered with ice
- Autorzy:
-
Grigorieva, N.
Kupriyanov, M.
Ostrovskiy, D.
Stepanova, D. - Powiązania:
- https://bibliotekanauki.pl/articles/332177.pdf
- Data publikacji:
- 2016
- Wydawca:
- Polskie Towarzystwo Akustyczne
- Tematy:
-
diffraction of acoustic waves
ice-covered homogeneous waveguide
normal modes of the waveguide
pulse with a Gaussian envelope
surface waves
Franz type
Whispering Gallery type - Opis:
- This paper is devoted to modeling of the pulse scattering by a spherical target immersed in a homogeneous waveguide covered with ice. For calculating the echo signal in the frequency domain we have followed Hackman and Sammelmann’s general approach. The arising scattering coefficients of a sphere were evaluated with the use of the normal mode method. The amount of normal modes forming the backscattered field is determined by the given directivity of the source. The emitted signal is a pulse with a Gaussian envelope. Computational results are obtained in a wide frequency range 8 - 12 kHz for water depths equal to several hundreds of m, and distances between the source/receiver and a target from 1 km up to 10 km. The target is assumed to be acoustically rigid or fluid. In particular, the properties of the ice cover and a scatterer may coincide.
- Źródło:
-
Hydroacoustics; 2016, 19; 139-144
1642-1817 - Pojawia się w:
- Hydroacoustics
- Dostawca treści:
- Biblioteka Nauki
Artykuł