Transmission of Acoustic Waves through Submerged Viscoelastic Spherical Shells

Workman, G. H.; Hayek, Sabih I.

doi:10.1121/1.1911859

Cited by 4 publications

(3 citation statements)

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“…These are resonances of the air column inside the shell, excited into vibration by the shell itself. Various other works [123,124] have studied the transmission of sound inside similar shells [99,156].…”

Section: Experimental Implementation Of Rst Predictionsmentioning

confidence: 99%

Acoustic Resonance Scattering by Submerged Elastic Shells

Gaunaurd

Werby²

1990

Applied Mechanics Reviews

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We review a number of instances in which classical acoustic wave scattering from submerged elastic shells can be analyzed in the resonance region of their spectra. We recently reviewed (Refs 42,43,12) the cases dealing with acoustic resonance scattering from solid elastic bodies, or with elastic resonance scattering from fluid or solid inclusions in elastic media. It only remains for us to address the works dealing with submerged shells, which we analyze here. We study scattering by bare or viscoelastically coated spherical and cylindrical shells in water, by means of (exact) normal-mode solutions, and by spheroidal shells by numerical approaches, particularly via the T-matrix method. We consider the shell responses mostly in unbounded media and when the interrogating waves are plane and c.w., although some recent findings valid for pulsed incidences and in the vicinity of environmental boundaries are also included. We use the methodology of the resonance scattering theory (RST) as much as possible, emphasizing its post-1981 results. High-frequency findings, obtained by asymptotic methods, are extrapolated to lower frequencies, to confirm RST predictions for the intermediate spectral regions in which the most important structural resonances are known to reside. A large number of bibliographical entries are collected and discussed in connection with our approach.Downloaded From: http://appliedmechanicsreviews.asmedigitalcollection.asme.org/ on 05/24/2015 Terms of Use: http://asme.org/terms Gaunaurd and Werby: Acoustic resonance scattering

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Section: Experimental Implementation Of Rst Predictionsmentioning

confidence: 99%

Acoustic Resonance Scattering by Submerged Elastic Shells

Gaunaurd

Werby²

1990

Applied Mechanics Reviews

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“…Also, a number of materials used in construction of underwater structures (such as rubber or adiprene in the case of vibrating underwater sound sources) tend to exhibit a rate effect even when response is in the elastic range. However, the number of fluid-shell interaction problems in which plastic, or, in the latter case, viscoelastic material behavior is taken into account are extremely few [1,2]. 1 It is the purpose of this work to develop a set of solutions for 1 Numbers in brackets designate References at end of paper.…”

Section: Introductionmentioning

confidence: 99%

“…However, the number of fluid-shell interaction problems in which plastic, or, in the latter case, viscoelastic material behavior is taken into account are extremely few [1,2]. 1 It is the purpose of this work to develop a set of solutions for 1 Numbers in brackets designate References at end of paper. Contributed by the Applied Mechanics Division for publication in the JOURNAL OF APPLIED MECHANICS.…”

Section: Introductionmentioning

confidence: 99%

Transient Response of Viscoplastic and Viscoelastic Shells Submerged in Fluid Media

Duffey¹

1976

Journal of Applied Mechanics

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The transient fluid-shell interaction problem is investigated for thin shells constructed of other than linearly elastic materials. Specifically, solutions are developed in terms of elementary functions for the transient responses of impulsively loaded, fluid-surrounded spherical shells constructed of either viscoplastic or viscoelastic materials. In all cases the fluid medium surrounding the shell is taken as inviscid and compressible and only spherically symmetric shell motions and radiation of sound into the surrounding medium are considered. It is found that the influence of material strain hardening and strain-rate sensitivity can be significant in reducing fluid-shell displacement responses. Further, limited investigations for viscoelastic materials indicate that for higher loss materials, displacement response of the shell is significantly altered by the inclusion of the viscoelastic behavior.

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