| 多孔径微穿孔板的主动吸声仿真研究 |
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| 引用本文： | 张晓晓,李子博,孔德义,刘淑梅,李山山.多孔径微穿孔板的主动吸声仿真研究[J].压电与声光,2017,39(1):48-51. |
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| 作者姓名： | 张晓晓 李子博 孔德义 刘淑梅 李山山 |
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| 作者单位： | （1.中国科学院 合肥智能机械研究所，安徽 合肥 230031；2.中国科学技术大学 合肥物质研究院，安徽 合肥 230026） |
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| 基金项目： | 国家自然科学基金资助项目（11474291） |
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| 摘 要： | 提出一种基于多孔径微穿孔板的主动吸声方法,在微穿孔板的空腔内横向放置可上下移动的隔板。从理论上说明了移动隔板改变声阻抗的可行性,利用数值分析法进一步比较了两种隔板移动方法对3种典型参数多孔径微穿孔板吸声性能的影响。对于15mm背腔的多孔径微穿孔板,在800~1 900Hz频段内平均吸声系数的分析结果达到0.85,表明该主动吸声方法的有效性,同时也为拓宽微穿孔板吸声体的频带提供了新思路。
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| 关 键 词： | 多孔径微穿孔板 主动吸声 吸声性能 吸声系数 隔板 |
Simulation Study on Active Sound Absorption Based on Multi-size Micro-perforated Plate Structure |
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| ZHANG Xiaoxiao,LI Zibo,KONG Deyi,LIU Shumei,LI Shanshan.Simulation Study on Active Sound Absorption Based on Multi-size Micro-perforated Plate Structure[J].Piezoelectrics & Acoustooptics,2017,39(1):48-51. |
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| Authors: | ZHANG Xiaoxiao LI Zibo KONG Deyi LIU Shumei LI Shanshan |
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| Affiliation: | (1.Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China;
2.Dept. of Hefei Institute of Physical Science, University of Science and Technology of China, Hefei 230026, China) |
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| Abstract: | An active absorption method based on multi size micro perforated plate structure (MPP) is proposed in this paper. A separating panel which can be driven to move up and down horizontally is placed inside the cavity of MPP. The feasibility of adjusting acoustic impedance by moving the separating panel is discussed theoretically. The effects of two methods of driving separating panel on the three typical parameters multi size MPP are further compared by using the numerical simulation. For multi size MPP with a cavity of 15 mm depth, the average sound absorption coefficient at the band range of 800~1 900 Hz is up to 0.85. It indicates the validity of the active sound absorption method, and also provide a new way to widen acoustic absorption band of MPP absorbers. |
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| Keywords: | multi size micro perforated plate structure active sound absorption sound absorption performance sound absorption partition |
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