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Title:
Resonance-coupling effect on broad band gap formation and sound absorption in locally resonant Sonic metamaterials with Woodpile structure
Author: Wang YR(王育人); Jiang H(姜恒); Chen M(陈猛); Guo, Yanhong
Issued Date: 2017
Conference Name: 24th International Congress on Sound and Vibration, ICSV 2017
Conference Date: July 23, 2017 - July 27, 2017
Conference Place: London, United kingdom
Abstract:

Sonic metamaterials have important applications in many fields such as noise control, and acoustic communication. Bwand gap and sound-absorbing spectrum are main judgements for the properties of sonic metamaterials. To broaden the resonant band gap and sound-absorbing spectrum, Woodpile structure was introduced into sonic metamaterials. Woodpile locally reso-nant sonic metamaterials (LRSMs) are formed by orthogonally stacking square coated-ultralight metal rods and embedding them layer by layer in an poly urethane (PU) matrix. Calculations suggest that Woodpile LRSMs have wider band gaps, which are adaptable to all types of vibra-tion polarizations. Using vibration modes and a mass-spring model, strong coupling effect is confirmed between the orthogonal resonances at the upper edge of the band gap, providing a wider bandwidth. Moreover, considering viscoelasticity of materials, woodpile LRSMs can im-plement strong sound-absorbing effect in a wide range, which provides a new idea for the de-sign and preparation of light weight and low frequency underwater sound-absorbing materials.

Indexed Type: EI
Language: 英语
Department: NML空间材料物理力学
Content Type: 会议论文
URI: http://dspace.imech.ac.cn/handle/311007/71947
Appears in Collections:国家微重力实验室_会议论文

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Recommended Citation:
Wang YR,Jiang H,Chen M,et al. Resonance-coupling effect on broad band gap formation and sound absorption in locally resonant Sonic metamaterials with Woodpile structure[C]. 见:24th International Congress on Sound and Vibration, ICSV 2017. London, United kingdom. July 23, 2017 - July 27, 2017
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