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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
会议名称24th International Congress on Sound and Vibration, ICSV 2017
会议日期July 23, 2017 - July 27, 2017
会议地点London, United kingdom
摘要

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.

课题组名称NML空间材料物理力学
收录类别EI
语种英语
文献类型会议论文
条目标识符http://dspace.imech.ac.cn/handle/311007/71947
专题国家微重力实验室
推荐引用方式
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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