Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Elastic wave band gaps in 2D fractal phononic crystals
Submission Author:
Victor Gustavo Ramos Costa Dos Santos , SP , Brazil
Co-Authors:
Victor Gustavo Ramos Costa Dos Santos, Edson Jansen Pedrosa de Miranda Junior, Jose Maria Campos dos Santos
Presenter: Victor Gustavo Ramos Costa Dos Santos
doi://10.26678/ABCM.COBEM2021.COB2021-2336
Abstract
The wave propagation in a 2D fractal phononic crystal solid is investigated. This special type of phononic crystal is capable of filtering elastic waves in multiple ranges of frequency, called band gaps. The band structures are obtained by the plane wave expansion (PWE) approach considering wave propagation in the xy plane in order to obtain the propagating modes. The multiple Bragg-type band gaps between XY and Z modes are opened up in different frequency bands depending on the fractal order. This fractal order influences significantly the band gap positions and widths. The results can be used for elastic wave attenuation using 2D fractal periodic structures.
Keywords
periodicity, Vibration control, multiple band gaps
