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Scattering of acoustic waves by a layered elastic obstacle in a fluid - an improved null field appraoch

Anders Boström (Institutionen för tillämpad mekanik, Dynamik)
Journal of the Acoustical Society of America (0001-4966). Vol. 76 (1984), p. 588-593.
[Artikel, refereegranskad vetenskaplig]

Scattering by a layered elastic obstacle submerged in a fluid is considered. The null field approach (T-matrix method) is used, but the method is modified so that all surface fields can be expanded in spherical harmonics. The resulting method is then compared with the conventional null field approach (which uses expansions in regular wavefunctions), and it is concluded that the present method is better in general. It is, however, doubtful if the null field approach is applicable to cases where there is no sphere that circumscribes the core and inscribes the outer surface. Some numerical results are given for a layered spheroid and superspheroid.

Nyckelord: acoustc waves, elastic obstacle

Denna post skapades 2013-12-27. Senast ändrad 2015-03-30.
CPL Pubid: 190531


Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Dynamik (1900-2017)


Teknisk mekanik

Chalmers infrastruktur