Vibroacoustic Optimization and Implementation of Adaptive Metacomposite Based on Periodically Distributed Shunted Piezoelectric Patches
Résumé
In the last few years, a technological revolution has occurred in the fields of integrated MEMS that offers new opportunities for smart
structures design and optimization. We know today that the mechanical integration of active smart materials, electronics, chipsets and power
supply systems is possible for the next generation of smart composite structures that can be considered as a new class of adaptive
metamaterials. By using integrated distributed set of electromechanical transducers, one can attain new functionalities. In this paper, we present
an application of the Floquet-Bloch theorem in the context of electrodynamics for vibroacoustic power flow optimization by mean of distributed shunted piezoelectric material. The main purpose is to present a numerical approach able to compute the multi-modal wave dispersions
curves into the whole first Brillouin zone for periodically distributed damped 2D mechanical systems. In a second time, we optimize the piezoelectric
shunting electrical impedance for controlling energy diffusion into the proposed semi-active distributed set of cells. Particular implantation
problems are also addressed for taking into consideration electromechanical lack of robustness due to electronic coupling and patches electrostatic parasitic behavior.