光电工程, 2017, 44 (1): 34, 网络出版: 2017-02-23
用于声波调控的五模式超材料
Pentamode metamaterials for acoustic wave control
声波调控 五模式超材料 布拉格散射 局域共振 acoustic wave control pentamode metamaterials Bragg scattering local resonance
摘要
五模式超材料由于具有各向异性的弹性模量,在声波调控和声隐身方面有重要的潜在应用,因此受到了国内外的广泛关注。本文从五模式超材料的基本概念出发,对布拉格散射型五模式超材料的声学性质、弹性及力学性质的研究进展进行详细介绍,进一步介绍了我们所研究的局域共振型五模式超材料的声学和弹性性质,并对五模式超材料的数值计算方法、加工制备和测试技术进行详细介绍。另外还对五模式超材料的目前尚未解决的科学及工程问题进行分析讨论。受到结构调控的局域共振型五模式超材料兼具各向异性弹性模量和局域共振型声子晶体低频完全声子禁带的特性,为低频声波减振降噪及低频声隐身带来新的设计思路。
Abstract
Pentamode Metamaterials (PMs) with anisotropic elastic tensor have potential applications for acoustic cloaking, so it is attracted a lot of research interest. In the review, pentamode materials and their recent progress are introduced. It includes the concept of PMs, the acoustic and elastic properties of Bragg scattering PMs and Local resonant type of PMs. The fabrications and measurement methods are also introduced. PMs perturbed structures have advantages of anisotropic elastic tensor and 3D complete acoustic bandgap, therefore they pro-vide a way for low-frequency acoustic cloaking.
王兆宏, 蔡成欣, 楚杨阳, 刘广顺. 用于声波调控的五模式超材料[J]. 光电工程, 2017, 44(1): 34. 王兆宏, 蔡成欣, 楚杨阳, 刘广顺. Pentamode metamaterials for acoustic wave control[J]. Opto-Electronic Engineering, 2017, 44(1): 34.