11 April 2017 Tunable acoustic metamaterial based on piezoelectric ceramic transducer
Author Affiliations +
In this paper, a tunable metamaterial consisting of periodic layers of steel, polyurea and piezoelectric ceramic transducer (PZT) was presented. The PZT layer in this structure was connected to an inductor L. Transfer matrix method was used to calculate the band structure of the sample. It was observed that an extremely narrow stop band was induced by the PZT layer with inductor L. This narrow stop band was attributed to the resonance circuit constituted by the piezoelectric layer, for the piezoelectric layer with electrodes could be seen as a capacitor. Further, homogenization was used to calculate the effective elastic constants of the sample. Results showed that the effective parameters of this structure behaved negative in the narrow stop band. The location of the narrow stop band was in the charge of inductor L, which could be used to design acoustic filters or noise insulators by changing the parameters of structure.
Conference Presentation
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Xiaohui Zhu, Xiaohui Zhu, Jing Qiao, Jing Qiao, Guangyu Zhang, Guangyu Zhang, Qiang Zhou, Qiang Zhou, Yingdan Wu, Yingdan Wu, Longqiu Li, Longqiu Li, } "Tunable acoustic metamaterial based on piezoelectric ceramic transducer", Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 1016411 (11 April 2017); doi: 10.1117/12.2259963; https://doi.org/10.1117/12.2259963

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