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Numerical Computation of the Acoustic Pressure in a Coupled Covered Plate/Fluid Problem: Experimental Validation

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This work deals with a coupled acoustic problem: a fluid contained in a cavity whose walls are all rigid except for the top, where a flexible plate is placed. The fluid is described by means of its pressure, whereas for the plate the Reissner-Mindlin model is used. A finite element method to solve this coupled problem, based on Lagrange hexahedral elements in the fluid and four node MITC elements in the plate, is presented. A comparison between numerical and experimental results is presented. Then, the behaviour of an absorbing layer attached to the plate is described by using a wall impedance condition and also by means of two different fluid equivalent models. Again, a comparison between numerical and experimental results is presented for the covered problem.
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Document Type: Research Article

Publication date: March 1, 2010

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  • 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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