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A wave based method to predict the absorption, reflection and transmission coefficient of two-dimensional rigid frame porous structures with periodic inclusions
Abstract : This paper presents an extension to the Wave Based Method to predict the absorption, reflection and transmission coefficients of a porous material with an embedded periodic set of inclusions. The porous unit cell is described using the Multi-Level methodology and by embedding Bloch–Floquet periodicity conditions in the weighted residual scheme. The dynamic pressure field in the semi-infinite acoustic domains is approximated using a novel wave function set that fulfils the Helmholtz equation, the Bloch–Floquet periodicity conditions and the Sommerfeld radiation condition. The method is meshless and computationally efficient, which makes it well suited for optimisation studies.
https://hal-univ-lemans.archives-ouvertes.fr/hal-02458835
Contributeur : Olivier Dazel <>
Soumis le : mercredi 29 janvier 2020 - 06:41:11
Dernière modification le : jeudi 21 janvier 2021 - 16:11:17
Contributeur : Olivier Dazel <>
Soumis le : mercredi 29 janvier 2020 - 06:41:11
Dernière modification le : jeudi 21 janvier 2021 - 16:11:17
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