Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
ACTIVE CONTROL OF BAND GAPS ON A SMART PHONONIC BEAM
Submission Author:
Massao Kodama Dourado , SP
Co-Authors:
Massao Kodama Dourado, Paulo José Paupitz Gonçalves, Carlos De Marqui Junior, Danilo Beli
Presenter: Massao Kodama Dourado
doi://10.26678/ABCM.COBEM2019.COB2019-0531
Abstract
Periodic structures are systems composed of repeated fundamental blocks called unit cells. As well established in photonics and phononics or structural dynamics, these periodic structures present pass bands and stop bands, which are frequency ranges where waves can or cannot propagate, respectively. In phononic crystals, the frequency where a stop band occurs is defined by the geometric and material properties of the primary unit cell. With the objective of improving these passive characteristics, this paper investigates the influence of active control using piezoelectric elements as actuators. The passive and active structural influence of the piezoelectric elements coupled to a beam are investigated and their effects over the pass and stop bands are discussed. The electromechanical periodic system is modeled using the spectral element method.
Keywords
spectral elements, periodic structures, phonic crystals, smart materials
