改进型传递矩阵法的多穿孔率复合微穿孔板吸声性能研究

胡齐笑; 丁善婷; 刘荻

doi:10.13433/j.cnki.1003-8728.20200271

改进型传递矩阵法的多穿孔率复合微穿孔板吸声性能研究

doi: 10.13433/j.cnki.1003-8728.20200271

湖北工业大学机械工程学院, 武汉 430068

基金项目:

国家质量监督检验检疫总局专项项目 201310004

详细信息

作者简介:
胡齐笑(1993-), 硕士, 研究方向为仪器仪表工程, 1163212410@qq.com

通讯作者:
丁善婷, 副教授, 硕士生导师, 15071240567@139.com

中图分类号: TB535
计量
- 文章访问数: 351
- HTML全文浏览量: 154
- PDF下载量: 23
- 被引次数: 0
出版历程
- 收稿日期: 2020-06-16
- 刊出日期: 2020-11-01

Study on Sound Absorption Performance of Micro-perforated Plates with Multiple Perforation Rates based on Improved Transfer Matrix Method

School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China

摘要

摘要: 针对传统单层微穿孔板吸声体吸声带宽较窄的不足，本文研究了多穿孔率复合微穿孔板的吸声性能优化作用。基于体积流连续原理，采用改进型传递矩阵法，推导了多穿孔率复合微穿孔板吸声系数公式，探讨了多穿孔率对吸声性能的影响。数值仿真和实验验证表明，多穿孔率复合微穿孔板较传统单层板有更好的吸声带宽，不同穿孔率分布对微穿孔板吸声结构最大吸声系数的影响显著。
- 多穿孔率 /
- 复合微穿孔板 /
- 吸声性能 /
- 传递矩阵法
Abstract: Due to narrow sound absorption bandwidth of traditional single-layer micro-perforated panel absorber, this paper studies the sound absorption performance optimization of composite micro-perforated panel with multiple perforation rates. Based on the principle of volume flow continuity, an improved transfer matrix method is employed to derive formulas of sound absorption coefficient about composite micro-perforated panel with multiple perforation rates, and the effect of multiple perforation rates on sound absorption performance is discussed. Results of numerical simulation and experiment show consistently that the composite micro-perforated panel with multiple perforation rates has larger efficient sound absorption bandwidth than traditional single-layer plate, and different distribution of perforation rates has significant influence on the maximum sound absorption coefficient of the micro-perforated plate sound absorption structure.
- multiple perforation rates /
- composite micro-perforated panel /
- sound absorption performance /
- transfer matrix method

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图 1 单层微穿孔板吸声结构的传统等效图

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图 2 基于传递矩阵法的微穿孔板吸声结构数学模型

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图 3 两种穿孔率复合微穿孔板吸声结构主视图

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图 4 两种穿孔率的微孔排列俯视图

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图 5 板两侧空气流分布示意图

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图 6 两种穿孔率复合微穿孔板中间处截取的部分

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图 7 两种穿孔率复合微穿孔板吸声结构的等效电路图

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图 8 不同的单一穿孔率对微穿孔板吸声性能的影响

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图 9 两种穿孔率分布对微穿孔板吸声性能的影响

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图 10 激光加工下左、右侧穿孔率比值为1:3微穿孔板(A₁)

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图 11 激光加工下左、右侧穿孔率比值为2:3微穿孔板(A₂)

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图 12 微穿孔板吸声系数测试系统

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图 13 两种不同穿孔率复合单层板吸声性能理论与实验对比曲线图

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图 14 单一穿孔率与复合穿孔率的单层板吸声性能理论与实验对比曲线图

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表 1 不同穿孔率的吸声结构模型评价参数

穿孔率p/%	最大吸声系数	共振频率/Hz	吸声带宽
1	0.927 5	2 280	2.438
2	0.995 4	2 716	2.383
3	0.930 8	2 915	1.760

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表 2 两种穿孔率复合微穿孔板吸声结构的结构参数

样品	d₁/mm	d₂/mm	p₁/%	p₂/%	t/mm	D/mm
A₁	0.1	0.1	1	3	0.1	25
A₂	0.1	0.1	2	3	0.1	25

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