Improved evaluation of the resonance spectral parameters of sound scattering from the spherical thin elastic shell

Author

Piddubniak, O.P. ; Piddubniak, N.G.

Author_Institution

State Univ. Lviv Polytech., Ukraine

fYear

36100

fDate

2-5 Nov1998

Firstpage

121

Lastpage

125

Abstract

The resonance characteristics of the complex amplitudes of acoustic pressure scattering by an elastic thin spherical shell are investigated. In the R-matrix approach the analytical relations for the approximate determination of the partial resonance frequencies and widths are found. The conditions for effective “background” scattering suppression and selection of resonances caused by sound radiation of the shell on the bending and membrane vibrations are obtained. For quadrupolar sound scattering by shells of average thickness a correlation between the widths of the spectral lines of the zero order symmetrical Lamb wave (membrane type of vibration) and the chemical type of the shell metal is discovered

Keywords

acoustic resonance; acoustic wave scattering; matrix algebra; spectral analysis; structural acoustics; surface acoustic waves; vibrations; R-matrix approach; acoustic pressure scattering; background scattering suppression; bending vibrations; complex amplitudes; membrane vibrations; partial resonance frequencies; quadrupolar sound scattering; resonance spectral parameters; shell metal; sound radiation; sound scattering; spectral lines; spherical thin elastic shell; widths; zero order symmetrical Lamb wave; Acoustic scattering; Acoustic waves; Biomembranes; Cause effect analysis; Chemical analysis; Polynomials; Resonance; Resonant frequency; Scattering parameters; Vibrations;

fLanguage

English

Publisher

ieee

Conference_Titel

Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory, 1998. DIPED-98. Proceedings of III International Seminar/Workshop on

Conference_Location

Tbilisi

Print_ISBN

966-02-0621-6

Type

conf

DOI

10.1109/DIPED.1998.730958

Filename

730958