Tunability of band gaps and energy harvesting based on the point defect in a magneto-elastic acoustic metamaterial plate

The present study investigated the intelligent control of both band gaps (BGs) and energy harvesting based on the point defect of magneto-elastic acoustic metamaterial and piezoelectric effect. The numerical results obtained by the finite element method indicate that band structures and frequency range of acoustic energy harvesting can be modulated significantly by an applied magnetic field, which leads to broadband BGs and promotes the electromechanical energy conversion efficiency. Consequently, the proposed structure can provide new avenues for designing of both tunable acoustic insulator and a broad-distributed energy harvester in engineering fields.