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We propose a model of a piezoelectric power harvester that scavenges energy from the cavity of a phononic crystal (PnC). The band structure of the PnC with a cavity is calculated by super-cell technique. The energy is collected in the cavity when the frequency of the cavity defect mode appears inside the band gap. As a result, the harvester can transform mechanical energy into electric energy efficiently.
Theoretical models of beam piezoelectric phononic crystal have been proposed, where piezoelectric patches and other elastic structure are arrayed periodically. Each piezoelectric patch is connected by a resonant shunting circuit independently. Three kinds of piezoelectric patches, i.e., bimorph in series and in parallel, and unimorph, are taken into consideration. The coupling interaction between...
A tube phononic crystal (PC) model arrayed periodically by metal and piezoelectric segments is proposed. Each piezoelectric segment consists of two piezoelectric layers connected in parallel independently by a resonant shunting circuit. The inductor and a piezoelectric equivalent capacitor form an inductor-capacitor oscillator. Coupling vibration of extension and flexure of the thin periodic tube...
A theoretical model of piezoelectric phononic crystal with tuned band gaps has been proposed. The piezoelectric phononic crystal consists of a beam and periodic array of piezoelectric patches. Each pair of piezoelectric patches is connected in parallel by resonant shunting circuits independently. The effect of structure and material parameters on Bragg and locally resonant band gap has been investigated...
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