噪声与振动控制2017，Vol.37Issue(1)：163-166,4.DOI:10.3969/j.issn.1006-1335.2017.01.035
薄膜型声学超材料微结构参数对其隔声性能的影响
Influence of Micro Structural Parameters on Sound Insulation Performance of Membrane-type Acoustic Metamaterials
叶超 1苏继龙1
作者信息
- 1. 福建农林大学机电工程学院,福州350002
- 折叠
摘要
Abstract
The transmission loss (TL),which is an important characteristic parameter describing insulation properties of thin-films of acoustic meta-materials,is calculated based on finite element method (FEA).On this basis,the relationship between the frequencies at the TL peaks (valleys) and the intrinsic frequencies of the whole system of the membrane-type acoustic meta-materials is discussed.Through adjusting the structure parameters of the thin film such as the membrane thickness,mass of the center metal block and the initial stress in the membrane,the relationship between the intrinsic frequencies of the system and the frequency band at the TL peaks (valleys) is investigated.It is concluded that the corresponding frequencies of the TL peaks (valleys) increase with the increase of the tensile force on the membrane edge,and the frequencies corresponding to the transmission losses of the second peak and the third peak decrease with the increase of membrane thickness.And the mass of the central mass block has significant influence on the frequency corresponding to the first peak (valley).关键词
声学/薄膜型声学超材料/传递损失/结构参数/固有频率Key words
acoustics/membrane-type acoustic metamaterials/transmission loss/structural parameters/intrinsic frequencies分类
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叶超,苏继龙..薄膜型声学超材料微结构参数对其隔声性能的影响[J].噪声与振动控制,2017,37(1):163-166,4.
