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多层微穿孔板吸声性能的理论分析与参数优化

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论文基于微穿孔板理论对单层、双层、三层微穿孔板在声波频率为0~1 500 Hz下的吸声性能进行分析,运用声电类比法和传递矩阵法分别计算双层微穿孔板、三层微穿孔板的吸声系数.首先使用控制单一变量法对影响微穿孔板吸声性能的各个参数做定性分析,确定各个参数与吸声性能是正相关还是负相关,其次使用有限元软件COMSOL Multiphysics对微穿孔板的吸声系数进行仿真计算,将有限元仿真的结果与数值仿真的结果进行对比,从而验证数值仿真的可靠性,再使用主成分分析法对微穿孔板的各个参数对吸声性能的影响进行定量分析,确定微穿孔板各个参数对第一吸声峰值对应频率的影响程度,给实际工艺中减小第一吸声峰值的频率提供理论的指导,最后通过改进遗传算法优化多层微穿孔板结构,给微穿孔板各个参数取一个合理的值使多层微穿孔板在0~1 500 Hz下具有良好的吸声性能,优化后的结果表明随着微穿孔板层数的增加其对低频声波的吸收能力会有所增强.
Theoretical Analysis and Parameter Optimization of Sound Absorption Performance of Multilayer Micro-perforated Plate
Based on the theory of micro-perforated plate,this paper analyzes the sound absorption performance of single-lay-er,double-layer and three-layer micro-perforated plate at the acoustic frequency of 0~1 500 Hz,and calculates the sound absorp-tion coefficient of double-layer and three-layer micro-perforated plate respectively by using the acousto-electric analogy method and the transfer matrix method.Firstly,the control single variable method is used to make a qualitative analysis of the various param-eters affecting the sound absorption performance of the micro-perforated plate,to determine whether the parameters are positively or negatively correlated with the sound absorption performance.Secondly,the finite element software COMSOL Multiphysics is used to simulate the sound absorption coefficient of the micro-perforated plate.The results of finite element simulation are compared with the results of numerical simulation to verify the reliability of numerical simulation.Then the principal component analysis method is used to quantitatively analyze the influence of each parameter of micro-perforated plate on the sound absorption performance to de-termine the influence degree of each parameter of micro-perforated plate on the corresponding frequency of the first sound absorp-tion peak.It provides theoretical guidance for reducing the frequency of the first sound absorption peak in the actual process.Final-ly,the structure of the multi-layer micro-perforated plate is optimized by improving the genetic algorithm,and each parameter of the micro-perforated plate is given a reasonable value to make the multi-layer micro-perforated plate have good sound absorption performance in the range of 0~1 500 Hz.The optimized results show that with the increase of the number of micro-perforated plates,the absorption capacity of low frequency acoustic waves will be enhanced.

micro-perforated plate theoryacoustoelectric analogy methodtransfer matrix methodsound absorption perfor-manceprincipal component analysisimproved genetic algorithm

胡家佳、罗光云

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上海工程技术大学 上海 201600

暨南大学 广州 518023

微穿孔板理论 声电类比法 传递矩阵法 吸声性能 主成分分析法 改进遗传算法

2024

计算机与数字工程
中国船舶重工集团公司第七0九研究所

计算机与数字工程

CSTPCD
影响因子:0.355
ISSN:1672-9722
年,卷(期):2024.52(4)
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