Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
Performance Analysis of a Duct With Multiple Internal Helmholtz Resonators
Submission Author:
wanderson vinicius de oliveira monteiro , SP
Co-Authors:
wanderson vinicius de oliveira monteiro, Arthur França Martins, Ubirajara Alves de Sousa Junnyor, Edilson Dantas Nóbrega, Jose Maria Campos dos Santos
Presenter: Jose Maria Campos dos Santos
doi://10.26678/ABCM.DINAME2023.DIN2023-0159
Abstract
Noise control in environments is essential to achieve acoustic comfort. One way to control the noise is the use of mufflers composed of acoustic metamaterials, which are artificial materials with unconventional properties. Acoustic metamaterials arranged periodically have forbidden bands or bandgaps, which are frequency ranges where sound waves do not propagate. Therefore, this work aims to analyze Helmholtz Resonator devices internally allocated in a periodic structure like a duct and evaluate the transmission loss of the sound and the forced responses. The effects of wave propagation in the structure were evaluated using the Finite Element Mmethod (FEM) and the Wave Finite Element (WFE) method , obtaining the dispersion diagram of a cell and the sound pressure level in the periodic structure. Results showed a bandgap in the resonance frequency of the Helmholtz device from the dispersion diagram, consequently, in the same frequency range, the sound wave attenuation occurred in the sound transmission loss and sound pressure level responses.
Keywords
Acoustic Metamaterial, Helmholtz resonator, wave finite element, Transmission Loss, Sound pressure level
