噪声与振动控制2019，Vol.39Issue(4)：32-35,4.DOI:10.3969/j.issn.1006-1355.2019.04.006
双层串联微穿孔板吸声体吸声特性研究
Study on the Acoustic Characteristics of Double-layer Micro-perforated Panel Absorbers
田文昊 1吴锦武 1李威 1韩伟2
作者信息
- 1. 南昌航空大学 飞行器工程学院,南昌 330063
- 2. 江苏航空职业技术学院 航空工程学院,江苏 镇江 212134
- 折叠
摘要
Abstract
Because of the narrow absorption frequency band of micro-perforated panels, it is necessary to broaden the band by using the double-layer micro-perforated panel absorbers. However, due to the great downward trend of the difference between the two peaks in the sound absorption curves of the two micro-perforated panels, the overall sound absorption coefficient of the absorber decreases greatly. In this paper, the theoretical model of the acoustic absorber with the double-layer micro-perforated plate is established using the transfer function method. The change of absorption coefficient due to the different perforation parameters and cavity depth are analyzed. The result of the analysis is verified by comparing it with the computation result of the model by means of COMSOL. Finally, the suitable parameters are selected to broaden the acoustic absorption frequency band and make sure that the absorber has larger absorption coefficients in the full acoustic absorption frequency band so that a better absorption effect of the absorber can be obtained.关键词
声学/双层串联微穿孔板/传递函数法/结构参数/吸声频带Key words
acoustics/ double-layer micro-perforated panel/ transfer function method/ structure parameters/ absorption bandband分类
通用工业技术引用本文复制引用
田文昊,吴锦武,李威,韩伟..双层串联微穿孔板吸声体吸声特性研究[J].噪声与振动控制,2019,39(4):32-35,4.
