Duct Metamaterial Muffler with Composite Acoustic Porous Media: Acoustic Optimization via Periodic Arrangement, Particle Swarm Optimization and Experimental Validation
Ziyi Liu, An Wang, Chi Cai, Xiao Wang, Qiyuan Fan, Bin Huang, Chengwen Liu, Yizhe Huang
TL;DR
This paper introduces a new muffler design using composite acoustic materials and optimization techniques to reduce noise effectively in duct systems.
Contribution
A novel composite acoustic duct metamaterial muffler is proposed with optimized periodic arrangements and validated experimentally.
Findings
Polyester fiber with 30 mm thickness and 5 mm width provides the best acoustic performance.
Axial periodic arrangement enhances peak noise attenuation while radial arrangement broadens bandwidth.
PSO optimization improved average transmission loss by approximately 12.05%.
Abstract
This study proposes a composite acoustic porous duct metamaterial muffler composed of a perforated tortuous channel and an externally wrapped porous layer, integrating both structural resonance and material damping effects. Theoretical models for the perforated plate, tortuous channel, and porous material were established, and analytical formulas for the total acoustic impedance and transmission loss of the composite structure were derived. Finite element simulations verified the accuracy of the models. A systematic parametric study was then performed on the effects of porous material type, thickness, and width on acoustic performance, showing that polyester fiber achieves the best results at a thickness of 30 mm and a width of 5 mm. Further analysis of periodic distribution modes revealed that axial periodic arrangement significantly enhances the peak noise attenuation, radial periodic…
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Taxonomy
TopicsAcoustic Wave Phenomena Research · Aerodynamics and Acoustics in Jet Flows · Cellular and Composite Structures