圆环形非常规排布微穿孔板吸声机理的研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (6) : 272-277.

论文

圆环形非常规排布微穿孔板吸声机理的研究

张翔，吴锦武，周伟青，熊引

作者信息 +

Sound absorption mechanism of micro perforated panels with unconventional annular arrangement of micropores

ZHANG Xiang， WU Jinwu， ZHOU Weiqing， XIONG Yin

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文章历史 +

摘要

航空航天等领域在部分结构件降噪设计时，不方便在结构件上直接布置常规均匀分布微穿孔板，而现有针对非常规排布微穿孔板吸声机理的研究还不够全面，故该研究提出一种基于Fok函数的分段式端部修正来分析圆环形非常规排布的微穿孔板吸声性能。使用仿真手段分析了微孔附近空气质点的速度分布；在此基础上对端部修正进行了改进；制作了试样在阻抗管系统中进行了测试，并且试验和理论结果均表明：圆环形非常规排布微穿孔板的吸声峰值频率的变化趋势一致。通过提出的分段式端部修正理论，既可用于非常规排布微穿孔板结构设计，同时也可通过测量结构的吸声性能来反推分析结构非规则微孔排布。

Abstract

In the field of aeronautics and astronautics, it is not convenient to directly arrange the conventional uniform distribution micro perforated panels on the structural parts in the noise reduction design of some structural components.However, there is few study on the sound absorption mechanism of unconventional arrangement micro perforated panels.Therefore, a segmented end correction method based on Fok function was proposed to analyse the unconventional micropore arrangement of annular micro perforated panels.The velocity distribution of the air particles near the micropore was analyzed by means of simulation.On this basis, the end correction was improved.A sample was made and tested in an impedance tube system, and the results were compared with those of the theoretical calculation.It is shown both are in good agreement.Moreover, both the experimental and theoretical results demonstrate that the trend of the absorption peak frequency of the unconventional micro perforated panel with annular arrangement is the same as that of the conventional.Based on the theory of segmented end modification, the method can be used not only in the structural design of unconventional micro perforated panels, but also in the back analysis of irregular micro perforated panels by measuring the sound absorption performance of the structure.

导出引用

张翔，吴锦武，周伟青，熊引. 圆环形非常规排布微穿孔板吸声机理的研究[J]. 振动与冲击, 2021, 40(6): 272-277

ZHANG Xiang， WU Jinwu， ZHOU Weiqing， XIONG Yin. Sound absorption mechanism of micro perforated panels with unconventional annular arrangement of micropores[J]. Journal of Vibration and Shock, 2021, 40(6): 272-277

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