Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Quarter-Wavelength Resonator Metamaterial Modeling via Wave Finite Element Method
Submission Author:
BRENNO VICTOR LIMA CAMPOS , SP
Co-Authors:
BRENNO VICTOR LIMA CAMPOS, Flaianny Bastos Pacheco, Jose Maria Campos dos Santos
Presenter: BRENNO VICTOR LIMA CAMPOS
doi://10.26678/ABCM.COBEM2021.COB2021-2330
Abstract
In the last couple of years, studies about metamaterials, whose the aim is ensure the occurrence of local resonances to block the acoustics wave to propagate in some frequency range, called bandgaps, have increased. New theoretical and experimental works have been developed due its applicability in waveguides, acoustic filters, cavities and sensors. In this work locally quarter-wavelength resonator mounted in a duct is designed for a certain resonance frequency that can be used in noise reduction problems. The duct-resonator acoustic system is modeled using the Transfer Matrix (TM) method and the Wave Finite Element (WFE) method, which has inherent advantages in solving wave propagation problems and periodic schemes. Dispersion diagram, forced response and sound transmission loss (STL) are calculated and the results are compared between methods and verified by the conventional Finite Element (FE) method.
Keywords
quarter-wavelength, bandgaps, metamaterial
