  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 kHz 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.
