Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Natalie S. Grigorieva"'
Publikováno v:
Acoustics, Vol 5, Iss 2, Pp 509-521 (2023)
A numerically efficient technique is presented for computing the backscattered fields from two spherical targets embedded in an underwater sediment. The bottom is assumed to be a homogeneous liquid attenuating half-space. The transmitter/receiver is
Externí odkaz:
https://doaj.org/article/3b4b54c5dde84b99a4f8b529833bbe86
Publikováno v:
Труды Санкт-Петербургского государственного морского технического университета. :122-136
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8eaf8e9877fd76f4b52aa12f956915e8
https://doi.org/10.52899/24141437_2022_02_122
https://doi.org/10.52899/24141437_2022_02_122
Publikováno v:
Acoustical Physics. 64:267-273
Consideration of the vertical sound velocity profile is highly important for solving problems of sound propagation in waveguides and scattering problems. A pulsed echo signal reflected from a spherical scatterer in a waveguide is modeled for the case
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ee44249edfd812d94b7c09c2df79434
https://doi.org/10.1134/s1063771018030065
https://doi.org/10.1134/s1063771018030065
Publikováno v:
Acoustical Physics. 62:8-21
An echo signal is simulated, which is reflected from a spherical scatterer located near an ice surface. The homogeneous water medium in which the scatterer is located is assumed semi-infinite. For the scattering coefficients of the sphere, asymptotic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c40a86509775f5f5fd9665b2170617d
https://doi.org/10.1134/s1063771016010036
https://doi.org/10.1134/s1063771016010036
Publikováno v:
Acoustical Physics. 61:127-135
The acoustic field scattered from an acoustically rigid or fluid sphere immersed in an ice-covered homogeneous waveguide is modeled. The bottom of the waveguide and the ice cover are specified by their densities and the propagation speeds of longitud
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76effe81d07bc8abea0d05ac697a5208
https://doi.org/10.1134/s1063771015010030
https://doi.org/10.1134/s1063771015010030
Publikováno v:
Acoustical Physics. 60:248-257
The paper is devoted to simulating an acoustic field scattered by an elastic spherical shell placed in a waveguide with a fluid attenuating bottom. The emitted signal is a wideband pulse with a Gaussian envelope. The normal wave method is used in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bcf77043671823562c07a0dfa3dbdf30
https://doi.org/10.1134/s1063771014030051
https://doi.org/10.1134/s1063771014030051
Autor:
Natalie S. Grigorieva
Publikováno v:
The Journal of the Acoustical Society of America. 145:1691-1691
The study is devoted to modeling of the backscattering from a spherical target located near the gas-saturated bottom. Two cases are compared: when the sound speed in sediment is larger and smaller than the sound speed in water (rigid and soft bottom)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c4c5a644fbee1fb4d0650c684882cad
https://doi.org/10.1121/1.5101200
https://doi.org/10.1121/1.5101200
Publikováno v:
Acoustical Physics. 59:373-381
The paper is devoted to modeling an acoustic field scattered by an elastic spherical shell. The shell is immersed in a waveguide with a fluid attenuating bottom. Modal analysis is applied to calculations of both the point source field in a free waveg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96b90979d6ae41d25f5858f01bb03b9c
https://doi.org/10.1134/s1063771013040064
https://doi.org/10.1134/s1063771013040064
Publikováno v:
Acoustical Physics. 57:652-660
Experiments on long-range propagation of low-frequency sound that were conducted starting from the mid-1980s indicate a complex character of propagation in an underwater sound channel, in which a source and a receiver are located close to the channel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b414d6464f6d783db44c5c0f17c9e56b
https://doi.org/10.1134/s1063771011040075
https://doi.org/10.1134/s1063771011040075
Autor:
Natalie S. Grigorieva, John A. Colosi, Bruce M. Howe, Rex K. Andrew, Michael A. Wolfson, Gregory M. Fridman, James A. Mercer
Publikováno v:
The Journal of the Acoustical Society of America. 125:1919-1929
Propagation of energy along the sound channel axis cannot be formally described in terms of geometrical acoustics due to repeated cusped caustics along the axis. In neighborhoods of these cusped caustics, a very complicated interference pattern is ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4190f0c9fa189498e84bab08744d648b
https://doi.org/10.1121/1.3082112
https://doi.org/10.1121/1.3082112