Analysis of the frequency response behaviour of anisotropic multilayered structures and potential acoustic performance optimizations

摘要

Anisotropy of elastic and acoustic properties increases the potential for performance tailoring of multilayered structures including poroelastic materials. An intrinsic part of such a design optimization is to understand the frequency response behaviour of such configurations in general and those including anisotropic porous layers in particular. In this work a plane wave method for anisotropic multilayered structures has been used to study the response sensitivity for anisotropic porous materials as a function of their material coordinate orientation. It is shown that, depending on the frequency range of interest, the sensitivity to the orientation of the anisotropic porous material varies.