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Inverse Modelling of Rubber Coated Steel Plates with a Genetic Algorithm

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Abstract:

We present results from a study for modelling an inhomogeneous rubber coating on a steel plate in terms of an acoustically equivalent coating composed of two layers of homogeneous rubber. A water-immersed steel plate, coated on one side with an anechoic rubber, was insonified by transient pulses and estimates of the transmission and reflection coefficients of the plate as function of center frequency, incidence angle and temperature were computed. By fitting parameters of the homogeneous rubber layers to the observed coefficients with a genetic algorithm a simpler but acoustically equivalent model was sought. Even though certain possibly significant anechoic and damping effects were not modelled directly in the analysis - as for instance oscillations of the cavities or scattering from the cavities - the numerical predictions with the final model were found to be in fairly good agreement with the experimental data.

Document Type: Research Article

Publication date: September 1, 2002

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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