Piezoelectric metastructures for simultaneous broadband energy harvesting and vibration suppression of traveling waves
Piezoelectric metastructures for simultaneous broadband energy harvesting and vibration suppression of traveling waves
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DOI：
10.1088/1361-665x/ac04c3
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发表时间：
2021-07-01
影响因子：
4.1
通讯作者：
Tol, S.
中科院分区：
文献类型：
--
作者：
Lin, Z.;Al Ba'ba'a, H.;Tol, S.
在本文中，我们探讨了一个机电元结构组成的周期性阵列的压电双晶片与连续电感负载的行波能量的同时收获和衰减。我们开发了完全耦合的分析模型，即电弹性传递矩阵方法，并利用本地谐振和布拉格带隙，以实现一个多功能的元结构，这是能够最大限度地进行能量转换和振动缓解在一个宽带的方式。我们的分析和数值计算结果表明，所提出的亚结构可以实现能量收集效率高达95%，在本地谐振频率为3.18 kHz，而达到约51%，在5.8 kHz附近的布拉格带隙的上限。宽带减振性能的基础上50%的功率衰减预测为1.8和1.1 kHz的带隙附近。理论框架和建议的元结构的适用性进行了验证，使用全尺寸的实验装置。
In this paper, we explore an electromechanical metastructure consisting of a periodic array of piezoelectric bimorphs with resistive-inductive loads for simultaneous harvesting and attenuation of traveling wave energy. We develop fully coupled analytical models, i.e. an electroelastic transfer matrix method, and exploit both locally-resonant and Bragg band gaps to achieve a multifunctional metastructure which is capable for maximum energy conversion and vibration mitigation in a broadband fashion. Our analytical and numerical results show that the proposed metastructure can achieve energy harvesting efficiency up to 95% at the local resonance frequency of 3.18 kHz, while reaching about 51% at 5.8 kHz near the upper limit of the Bragg band gap. The broadband vibration mitigation performance based on 50% power attenuation is predicted as 1.8 and 1.1 kHz in the vicinity of the band gaps. The theoretical frameworks and the applicability of the proposed metastructure are validated using a full-scale experimental setup.