Multifunctional metastructure based on beam for attenuate elastic wave propagation and energy harvesting
Résumé
Metamaterials are engineered materials with extraordinary properties, such as negative Poisson's ratio, negative refraction index, and negative effective mass. Structures based on these materials offer superior energy absorption, acoustic insulation, and multifunctionality, making them valuable in advanced applications. This study investigates a structure designed to mitigate undesired vibrations by directing energy to piezoelectric harvesters, converting it into electricity for powering microelectronic devices while reducing vibrations. The structure features a cantilever beam with piezoelectric resonators tuned to a target frequency, creating a local resonance bandgap that forbids elastic wave propagation. To extend the bandgap and enhance energy harvesting, nonlinearities using magnets are added to the resonators. This design broadens the bandgap and increases the operational bandwidth, improving wave mitigation and energy conversion. Mathematical models and simulations demonstrate the feasibility of achieving these objectives, with nonlinearity being key in optimizing performance.
| Origine | Fichiers produits par l'(les) auteur(s) |
|---|---|
| Licence |