Proceedings of the
The Nineteenth International Conference on Computational Intelligence and Security (CIS 2023)
December 1 – 4, 2023, Haikou, China
Optimization of Low-frequency Acoustic Performance of Micro-seam Plate Absorber
1Jiangsu Key Laboratory of Power Transmission and Distribution Equipment, Hohai University, China /EADDRESS/2College of Artificial Intelligence and Automation, Hohai University, China.
ABSTRACT
The micro-slit plate structure consists of thin plates perforated with a large number of identical narrow slits, cavities and rigid back cavities. However,existing studies mainly focus on the mid-frequency and high-frequency absorption performance of the micro-slit plate structure, while the low-frequency performance of the structure has been less investigated. To this end, this paper proposes a series-connected double-layer micro-slit plate acoustic structure to explore its low-frequency absorption characteristics under the conditions of perpendicular incidence of acoustic waves, and at the same time to optimise the design of its acoustic performance for a given absorption frequency on demand. This paper first introduces the tandem double-layer micro-slit plate acoustic structure and its theoretical acoustic impedance model.Then,the acoustic performance of the tandem double-layer micro-slit plate acoustic structure is parameterised using MATLAB.Finally, the structural parameters of the plate acoustic structure are taken as the optimization variables, and the acoustic performance at a given frequency is taken as the objective function to establish an optimization model, based on which the low-frequency performance of the acoustic structure is optimized by using the square-wave triggered brainstorming optimization to obtain the micro-slit plate acoustic structure with high-absorption characteristics in a given frequency range.
Keywords: Square-wave triggered brainstorming optimization, Tandem double-layer micro-seam plate acoustic structure, Acoustic absorption performance, Optimization, Acoustic impedance, Low-frequency performance.
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1Jiangsu Key Laboratory of Power Transmission and Distribution Equipment, Hohai University, China /EADDRESS/2College of Artificial Intelligence and Automation, Hohai University, China.
ABSTRACT
The micro-slit plate structure consists of thin plates perforated with a large number of identical narrow slits, cavities and rigid back cavities. However,existing studies mainly focus on the mid-frequency and high-frequency absorption performance of the micro-slit plate structure, while the low-frequency performance of the structure has been less investigated. To this end, this paper proposes a series-connected double-layer micro-slit plate acoustic structure to explore its low-frequency absorption characteristics under the conditions of perpendicular incidence of acoustic waves, and at the same time to optimise the design of its acoustic performance for a given absorption frequency on demand. This paper first introduces the tandem double-layer micro-slit plate acoustic structure and its theoretical acoustic impedance model.Then,the acoustic performance of the tandem double-layer micro-slit plate acoustic structure is parameterised using MATLAB.Finally, the structural parameters of the plate acoustic structure are taken as the optimization variables, and the acoustic performance at a given frequency is taken as the objective function to establish an optimization model, based on which the low-frequency performance of the acoustic structure is optimized by using the square-wave triggered brainstorming optimization to obtain the micro-slit plate acoustic structure with high-absorption characteristics in a given frequency range.
Keywords: Square-wave triggered brainstorming optimization, Tandem double-layer micro-seam plate acoustic structure, Acoustic absorption performance, Optimization, Acoustic impedance, Low-frequency performance.
Download PDF