Piezoelectric metacomposite structure carrying nonlinear multilevel interleaved-interconnected switched electronic networks
Résumé
In this article, a new class of piezoelectric phononic meta-composite structure carrying nonlinear multi-level interleaved-interconnected switched electronic networks is proposed, and its electro-elastic coupling between elastic waves and electrical waves is investigated. Normally, distributed multimodal resonant damping can be used to achieve several separate resonant-type band gaps for elastic wave propagation control in electromechanical phononic metamaterials. In the proposed approach, several resonant-type band gaps are induced by the peaks and valleys of electrical waves. Inductances adopted in the electronic network are besides much smaller than those required for generating resonant-type band gaps through conventional resonant circuit shunts. Such feature of requiring less or no inductance contributes to the generation of low-frequency band gaps in a semi-passive way. Numerical results show that the number of band gaps over the primitive pass band (between adjacent primitive stop bands) is determined by the level of the proposed nonlinear interleaved-interconnected electronic network. Compared with broadband wave propagation control, the proposed method is more flexible, and can easily target several discrete frequency domains of interest without significantly affecting other frequency domains. Through the theoretical and experimental investigation on low-frequency damping performance, wave control capability and damping performance are confirmed in the low frequency domain. (C) 2016 Elsevier Ltd. All rights reserved.