Piezoelectric metastructures for simultaneous broadband energy harvesting and vibration suppression of traveling waves. (17th June 2021)

• Record Type: Journal Article
• Authors: Lin, Z; Al Ba'ba'a, H; Tol, S
• Is Part Of: Smart materials and structures. Volume 30:Number 7(2021)
• Publication Date: 2021-06-17
• Subjects: broadband energy harvesting -- piezoelectric -- local resonance -- Bragg band gap -- traveling waves; Smart materials -- Periodicals; Strucural design -- Periodicals; 620.11
• DOI: 10.1088/1361-665X/ac04c3
• Languages: English
• ISSNs: 0964-1726

Abstract

Abstract: In this paper, we explore an electromechanical metastructure consisting of a periodic array of piezoelectric bimorphs with resistive-inductive loads for simultaneous harvesting and attenuation of traveling wave energy. We develop fully coupled analytical models, i.e. an electroelastic transfer matrix method, and exploit both locally-resonant and Bragg band gaps to achieve a multifunctional metastructure which is capable for maximum energy conversion and vibration mitigation in a broadband fashion. Our analytical and numerical results show that the proposed metastructure can achieve energy harvesting efficiency up to 95% at the local resonance frequency of 3.18 kHz, while reaching about 51% at 5.8 kHz near the upper limit of the Bragg band gap. The broadband vibration mitigation performance based on 50% power attenuation is predicted as 1.8 and 1.1 kHz in the vicinity of the band gaps. The theoretical frameworks and the applicability of the proposed metastructure are validated using a full-scale experimental setup.