基于Virtual.Lab Acoustics的管道壁面声阻抗优化分析
Optimization and Analysis of Acoustic Impedance of Duct Wall Based on Virtual.Lab Acoustics
DOI: 10.12677/OJAV.2018.62005, PDF,    国家自然科学基金支持
作者: 郑伟光*, 许 鹏, 林泽宇, 唐荣江：桂林电子科技大学，机电工程学院，广西 桂林
关键词: 管道噪声；声学有限元；最优声阻抗；传递损失；灵敏度分析；Duct Noise； Finite Element Method； Optimal Acoustic Impedance； Transmission Loss； Sensitivity Analysis
摘要: 针对有限长管道声学模型，为了使管道噪声在较宽的频带内达到最大的衰减，本文基于声学有限元理论，利用声学软件Virtual.Lab Acoustics对管道声衬阻抗参数进行优化。计算出矩形截面管道下，壁面声衬的声阻与声抗最优值，讨论了管内切向气流、声衬长度、声衬铺设方式对最优声阻抗值和管道传递损失的影响，并对声阻抗参数进行了灵敏度分析，为后续管道主被动复合吸声的实现提供了一定的理论依据。
Abstract: For acoustic model of the finite length duct, in order to make the duct noise achieve the maximum attenuation in a wide frequency band, based on the acoustic finite element method, the acoustic software Virtual.Lab Acoustics is used to optimize the impedance parameters of the acoustic liner of duct. The optimal values of the acoustic impedance and the acoustic impedance of the acoustic liner under the rectangular cross-section duct are figured out. The influence of the grazing flow, the length of the acoustic liner and the laying way on the optimal acoustic impedance and the transmission loss of duct are discussed. The sensitivity analysis of the acoustic impedance parameters is also given, which provides a theoretical basis for the realization of hybrid active/passive sound absorption.
文章引用：郑伟光, 许鹏, 林泽宇, 唐荣江. 基于Virtual.Lab Acoustics的管道壁面声阻抗优化分析[J]. 声学与振动, 2018, 6(2): 36-45. https://doi.org/10.12677/OJAV.2018.62005

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