Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Vibration Mitigation and Energy Harvesting with Bistable Resonators in Metamaterial Beams
Submission Author:
João Pedro Canisso Valese Norenberg , MS
Co-Authors:
João Pedro Canisso Valese Norenberg, Americo Barbosa da Cunha Junior
Presenter: Americo Barbosa da Cunha Junior
doi://10.26678/ABCM.COBEM2023.COB2023-1140
Abstract
Metamaterials are designed engineering systems that have qualities that are not seen in conventional materials. They may offer excellent energy absorption, acoustic insulation, negative compressibility, and other properties. Engineers are using these materials in various fields, including spatial, medical, and military applications. This study focuses on designing a metamaterial-based structure capable of simultaneously attenuating mechanical waves and generating low-power electrical energy. By converting vibrations into electricity, this structure eliminates the need for batteries in sensors or other embarked devices, reducing environmental impact, and can also supply energy to active control. The proposed structure consists of a cantilever beam with resonators equipped with piezoelectric material to convert kinetic energy into electricity. These oscillators induce local resonance, establishing a bandgap region where elastic waves cannot propagate. Linear and nonlinear resonators with bistable potential are considered. Their performances are studied and compared. Numerical simulations are conducted, and the results show that nonlinearity reduces resonance peaks and widens the bandgap for vibration attenuation. In terms of power generation, nonlinearity expands operating bandwidth and optimizes the amount of recovered energy. The study concludes that nonlinear resonators are essential to improve both vibration attenuation and energy harvesting. Additionally, the use of bistable resonators opens exciting possibilities for developing novel configurations that can further enhance the performance of the system.
Keywords
metamaterial, Vibration Attenuation, piezoelectric energy harvesting, bistable systems, nonlinear system
