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Resonance-coupling effect on broad band gap formation and sound absorption in locally resonant Sonic metamaterials with Woodpile structure
Wang YR(王育人); Jiang H(姜恒); Chen M(陈猛); Guo, Yanhong
2017
Conference Name24th International Congress on Sound and Vibration, ICSV 2017
Conference DateJuly 23, 2017 - July 27, 2017
Conference PlaceLondon, 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.

DepartmentNML空间材料物理力学
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/71947
Collection国家微重力实验室
Recommended Citation
GB/T 7714
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],2017.
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