Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Dynamical Analysis of Bistable Energy Harvester Using the Finite Element Method
Submission Author:
Virgilio Junior Caetano , RJ , Brazil
Co-Authors:
Virgilio Junior Caetano, Marcelo Savi
Presenter: Virgilio Junior Caetano
doi://10.26678/ABCM.COBEM2019.COB2019-0431
Abstract
The conversion of vibrational energy from environment to electrical energy through piezoelectric devices has received increasing attention in recent years. The main challenges nowadays are to develop more efficient devices that operate over a wide frequency range, adapting to diverse sources of excitation available in the environment. In this work, a cantilever-type energy harvesting device is considered. An investigation of multimode and nonlinear effects on the system’s performance is carried out. The nonlinearity included in the analysis is due to the nonlinear dependence between magnetic forces exerted by magnets and displacement of the beam’s tip. The system dynamics is modeled using finite element method (FEM). Results show the influence of vibrations source in the dynamics and performance of the device for frequency range corresponding to first and second bending modes. Nonlinear effect is related to a rich dynamic, presenting periodic and non-periodic responses. All these effects can be combined in order to enhance the system capacity for energy harvesting purposes.
Keywords
energy harvesting, Finite Element Method, nonlinear harvester, magnetic interaction, ANSYS
