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On the uniqueness of the problem of acoustic diffraction by an infinite plate with local irregularities. / Andronov, I. V.; Belinskiǐ, B. P.
в: Acoustical Physics, Том 47, № 1, 01.01.2001, стр. 3-9.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - On the uniqueness of the problem of acoustic diffraction by an infinite plate with local irregularities
AU - Andronov, I. V.
AU - Belinskiǐ, B. P.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - The question concerning the uniqueness of the solution to the problem of the acoustic diffraction by an immersed and isolated thin infinite plate with a finite scatterer is studied. It is shown that, to provide the uniqueness of the solution, the conditions at the scatterer must lead to an energy inequality for a source-free field, which determines the absence of the energy-carrying field components at infinity. A formula that generalizes the Sommerfeld formula is obtained and is used to prove the uniqueness of the solution to the problem of diffraction by a plate immersed in an acoustic medium. For the problem of diffraction of a flexural wave by an irregularity of the plate, the uniqueness theorem is proved only for the case of a fixed or hinged edge. When boundary conditions of a general form are imposed on the scatterer in an isolated plate, the uniqueness of the solution is generally lost, which is also corroborated by an example.
AB - The question concerning the uniqueness of the solution to the problem of the acoustic diffraction by an immersed and isolated thin infinite plate with a finite scatterer is studied. It is shown that, to provide the uniqueness of the solution, the conditions at the scatterer must lead to an energy inequality for a source-free field, which determines the absence of the energy-carrying field components at infinity. A formula that generalizes the Sommerfeld formula is obtained and is used to prove the uniqueness of the solution to the problem of diffraction by a plate immersed in an acoustic medium. For the problem of diffraction of a flexural wave by an irregularity of the plate, the uniqueness theorem is proved only for the case of a fixed or hinged edge. When boundary conditions of a general form are imposed on the scatterer in an isolated plate, the uniqueness of the solution is generally lost, which is also corroborated by an example.
UR - http://www.scopus.com/inward/record.url?scp=0035529736&partnerID=8YFLogxK
U2 - 10.1134/1.1340071
DO - 10.1134/1.1340071
M3 - Article
AN - SCOPUS:0035529736
VL - 47
SP - 3
EP - 9
JO - Acoustical Physics
JF - Acoustical Physics
SN - 1063-7710
IS - 1
ER -
ID: 39982566