Active elastic metamaterials with applications in vibration and acoustics
Active elastic metamaterials with applications in vibration and acoustics
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发表时间：
2012-08
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通讯作者：
S. Pope;H. Laalej;S. Daley;M. Reynolds
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作者：
S. Pope;H. Laalej;S. Daley;M. Reynolds
弹性超材料为解决振动和声学中存在的问题提供了新的途径。它们还与声学不可见和亚波长成像等新概念有关。为了应用于许多提出的应用，超材料需要在规定的频带内具有所需的质量密度和弹性模量。重要的是，活性超材料提供了一定程度的适应性。本文将着重于将先前的理论概念扩展到更现实的实验设计。这将包括考虑当理论和仿真发展成实验演示时出现的问题，包括控制系统动力学在可实现性能中的作用。还将研究带宽的适应性，以使性能达到其期望值。
Elastic metamaterials provide a new approach to solving existing problems in vibration and acoustics. They have also been associated with novel concepts such as acoustic invisibility and subwavelength imaging. To be applied to many of the proposed applications a metamaterial would need to have the desired mass density and elastic moduli over a prescribed frequency band. Importantly active metamaterials provide a degree of adaptability. This paper will focus on extending a previous theoretical concept to a more realistic experimental design. This will include a consideration of the problems which arise when the theory and simulation are developed into an experimental demonstration, including the role which the control system dynamics play in the achievable performance. The adaptability of the bandwidth in which the properties achieve their desired values will also be investigated.