Optimization design and analysis of broadband sound absorption for honeycomb micro-perforated structure

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (19) : 248-253.

YAN Shanlin, WU Jinwu, XIONG Yin, CHEN Jie, LI Heming

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Abstract

The single-layer microperforated plate structure has the disadvantages of narrow sound absorption frequency band and inferior sound absorption performance. In order to improve the noise reduction performance of single-layer microperforated plate structure, a single-layer honeycomb micro-perforated structure with highly efficient broadband sound absorption performance was designed and analyzed from three perspectives of theoretical model, simulation calculation and experimental test. It was based on the characteristics that the resonant frequency of the structure could move with the the change of cavity depth. The principle of electroacoustic analogy and particle swarm optimization algorithm were used in combination. The principle of using unequal cavity depth to improve the sound absorption performance of the structure was analyzed from the real and imaginary parts of the relative acoustic impedance of the structure. The results show that the sound absorption coefficient of the structure is above 0.9 in the range of 1140-3000 Hz. The feasibility of using particle swarm optimization algorithm to design the broadband sound absorber is verified.
Key words: Honeycomb Micro-perforated plate; Cavity depth; Particle swarm; Optimization algorithm; Broadband sound absorber

Key words

Honeycomb Micro-perforated plate / Cavity depth / Particle swarm / Optimization algorithm / Broadband sound absorber

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YAN Shanlin, WU Jinwu, XIONG Yin, CHEN Jie, LI Heming. Optimization design and analysis of broadband sound absorption for honeycomb micro-perforated structure[J]. Journal of Vibration and Shock, 2022, 41(19): 248-253

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