Interactions d'ondes planes hétérogènes au sein d'une lame à faces parallèles dissipative: confrontation théorie – expérience

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Abstract:

Invoking the continuity of the time-averaged Poynting vector at both interfaces of an immersed solid viscoelastic layer, we consider the energy balance of the plate. This energy balance takes into account the heterogeneity of the waves excited in the solid. Consequently, it is written in terms of two kinds of energy: that due to each wave separately, and that stemming from the interaction between each pair of waves. A comparison between theory and experiment is performed for the particular case of a P.V.C. plate immersed in water.

Zusammenfassung

Das klassische Problem einer festen, dämpfungsbehafteten Schicht und in ein Medium eingebetteten Schicht wird wieder aufgenommen. Hierzu wird die Energiebilanz dieser Schicht aufgestellt, wobei die Stetigkeit des zeitgemittelten Poynting-Vektors an den Grenzflächen verlangt wird. Sie berücksichtigt die heterogene Struktur der im Festkörper erregten Wellen und stellt sich dar als die Summe der Energie jeder Welle für sich und der Energie aufgrund der Wechselwirkung zwischen jedem Wellenpaar. Als Beispiel wird eine PVC-Schicht in Wasser betrachtet, für welche die experimentellen und die theoretischen Ergebnisse einander gegenübergestellt werden.

Sommaire

Reprenant le problème classique de la lame solide dissipative immergée, on exprime le bilan énergétique de cette lame, par l'écriture de la continuité aux interfaces du vecteur de Poynting moyenné dans le temps. Celui-ci tient compte de la structure hétérogene des ondes excitées dans le solide, et s'écrit comme la somme de l'énergie propre de chaque onde et des énergies issues de l'interaction entre toutes les ondes prises deux à deux. Pour l'exemple particulier d'une lame de P.V.C. immergée dans de l'eau, une confrontation avec l'expérience valide les résultats théoriques présentés.

Document Type: Research Article

Publication date: June 1, 1992

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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