Open Access

ARTICLE

Optimization of Sound Absorption and Insulation Performances of a Dual-Cavity Resonant Micro-Perforated Plate

by Wei Chen^1,2, Zhaofeng Guo^3,4,*, Hongda Feng^3,4, Sheng Hu^1,2, Ling Lu^1,2, Chuanmin Chen^3,4, Xiaowen Wu^1,2, Hao Cao^1,2

1 State Grid Hunan Electric Power Co., Ltd., Electric Power Research Institute, Changsha, 410000, China
2 State Grid Corporation of China Power Facilities Noise and Vibration Laboratory, Changsha, 410000, China
3 North China Electric Power University, Department of Environmental Science and Engineering, Hebei Provincial Key Laboratory of Coal-Fired Power Station Flue Gas Multi-Pollution Cooperative Control, Baoding, 071003, China
4 North China Electric Power University, Key Laboratory of Regional Energy System Optimization Ministry of Education, Beijing, 102206, China

* Corresponding Author: Zhaofeng Guo. Email:

Fluid Dynamics & Materials Processing 2022, 18(2), 481-496. https://doi.org/10.32604/fdmp.2022.015746

Received 10 January 2021; Accepted 26 March 2021; Issue published 16 December 2021

Abstract

This study investigates a dual-cavity resonant composite sound-absorbing structure based on a micro-perforated plate. Using the COMSOL impedance tube model, the effects of various structural parameters on sound absorption and sound insulation performances are analyzed. Results show that the aperture of the micro-perforated plate has the greatest influence on the sound absorption coefficient; the smaller the aperture, the greater is this coefficient. The thickness of the resonance plate has the most significant influence on the sound insulation and resonance frequency; the greater the thickness, the wider the frequency domain in which sound insulation is obtained. In addition, the effect of filling the structural cavity with porous foam ceramics has been studied, and it has been found that the porosity and thickness of the porous material have a significant effect on the sound absorption coefficient and sound insulation, while the pore size exhibits a limited influence.

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Keywords

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