A wave based method to predict the absorption, reflection and transmission coefficient of two-dimensional rigid frame porous structures with periodic inclusions

作者：Deckers Elke^*; Claeys Claus; Atak Onur; Groby Jean Philippe; Dazel Olivier; Desmet Wim

来源：Journal of Computational Physics, 2016, 312: 115-138.

DOI：10.1016/j.jcp.2016.02.007

• Acoustics
• Equivalent fluid
• Periodic structures
• Wave based method
• Absorption
• Transmission

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.

• 出版日期2016-5-1