Resonant stop band analysis using an inhomogeneous re-entrant honeycomb core structure
Résumé
Different ways to analyse the role of resonators for a vibroacoustic control taking a re-entrant unit cell as an hosting structure is done using classical WFEM tools. The core of the structure is analysed using the Floquet-Bloch theorem and resonators are added to the structure to understand the physical impact they bring in the case of a complex and inhomogeneous 3D structure. A parametric analysis on the resonator using a modified version of the Transfer Matrix Method is used to get the frequency responses of the finite structure to quickly identify the resonant stop bands. The 2D inverse WFEM is performed to analyse the type of waves travelling through the structure in order to understand how to improve the vibroacoustics performances by tuning the resonators keeping a constant mass to the overall system.