Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Smart beam coupled to piezoelectric resonant shunt vibration characterisation, control and bandgap generation
Submission Author:
Braion Moura , GO
Co-Authors:
Braion Moura, Matheus Canedo Borges, Marcela Rodrigues
Presenter: Braion Moura
doi://10.26678/ABCM.COBEM2021.COB2021-2333
Abstract
This paper analyses the dynamic behavior of a beam with piezoelectrics (piezos) coupled in a periodic array of resonant shunted patches in unimorph configuration. Based on the piezo ability to convert mechanical energy to electrical energy and vice versa, the connection of the resonant shunt circuit is adopted to provide vibration and wave propagation attenuation. Due to the piezo patches periodic array connected with a resonant shunt circuit, a vibration isolation band in a tuned frequency is expected. This effect is known as bandgap. Therefore, the results show the bandgap's effects and its characteristics relative to the unimorph piezoelectric configurations. The spectral elements method (SEM) is an efficient method requiring no discretization or a reduced number other than the element in the mesh element. Therefore, it is an efficient technique to analyses the structure's vibration response. The dispersion diagram is obtained using the transfer matrix method (TMM). The receptance response and the dispersion diagrams demonstrate the vibration and wave control effect by the resonant circuit, and also demonstrate the influence of the amount of piezos for the bandgap generation.
Keywords
Smart beam, Vibration control, Piezoelectric, Resonant shunt, Bandgap
