Design of tunable acoustic metamaterials through periodic arrays of resonant shunted piezos
Design of tunable acoustic metamaterials through periodic arrays of resonant shunted piezos
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DOI：
10.1088/1367-2630/13/11/113010
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发表时间：
2011-11-09
影响因子：
3.3
通讯作者：
Ruzzene, M.
中科院分区：
文献类型：
--
作者：
Airoldi, L.;Ruzzene, M.
采用周期分流压电片设计了一种可调谐的一维超材料。所考虑的结构包括进行纵向和横向运动的梁，以及连接到谐振电路的电极的压电片的周期性阵列。由此产生的声电系统的特点是在分流电路的调谐频率处发生内部谐振行为，并且在其操作中类似于先前提出的其他内部谐振系统，并增加了其简单的可调性。通过应用传输矩阵方法来表征波束的性能，该方法评估调谐频率处的带隙的发生并估计该带内的波衰减。此外，在分析框架内进行了均匀化研究，以说明系统的内部谐振特性。在所考虑的光束结构上进行的实验验证了理论预测，并说明了其内部谐振特性和相关带隙的形成。
Periodic shunted piezoelectric patches are employed for the design of a tunable, one-dimensional metamaterial. The configuration considered encompasses a beam undergoing longitudinal and transverse motion, and a periodic array of piezoelectric patches with electrodes connected to a resonant electric circuit. The resulting acousto-electrical system is characterized by an internal resonant behavior that occurs at the tuning frequency of the shunting circuits, and is analogous in its operation to other internally resonating systems previously proposed, with the addition of its simple tunability. The performance of the beam is characterized through the application of the transfer matrix approach, which evaluates the occurrence of bandgaps at the tuning frequencies and estimates wave attenuation within such bands. Moreover, a homogenization study is conducted to illustrate the internal resonant characteristics of the system within an analytical framework. Experiments performed on the considered beam structure validate the theoretical predictions and illustrate its internal resonant characteristics and the formation of the related bandgaps.