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Communication Dans Un Congrès Année : 2012

Time-domain numerical modeling of acoustical propagation in the presence of boundary irregularities

Olivier Faure
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Benoit Gauvreau
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Fabrice Junker
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Résumé

Numerical reference models are necessary to validate engineering methods used for acoustical predictions in realistic situations. These situations include irregular geometries and characteristics that are not accurately known. This can be due to the complexity of the propagation medium, space and time variability of its physical properties, measurements uncertainties, etc. The objective of this work is to compute sound propagation through such complex media using two numerical methods. The first one is based on the resolution of the Linearized Euler Equations with high order finite difference schemes (FDTD). The second one is based on a discrete representation of the Huygens principle using nodes and transmission lines (TLM). The required improvements of the numerical codes are exposed. First examples of numerical studies dealing with irregular geometries and impedance ground properties are presented.
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Dates et versions

hal-00810998 , version 1 (23-04-2012)

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Olivier Faure, Benoit Gauvreau, Fabrice Junker, Philippe Lafon. Time-domain numerical modeling of acoustical propagation in the presence of boundary irregularities. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810998⟩
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