Static and dynamic analysis of bistable piezoelectric- composite plates for energy harvesting
Static and dynamic analysis of bistable piezoelectric- composite plates for energy harvesting
复制标题
用于能量收集的双稳态压电复合材料板的静态和动态分析
DOI：
10.2514/6.2012-1492
复制
发表时间：
2012
影响因子：
9.1
通讯作者：
D. Inman
中科院分区：
文献类型：
--
作者：
D. Betts;H. A. Kim;C. Bowen;D. Inman
本文提出了一种结合压电贴片的双稳态复合材料板的布置，用于从环境机械振动中进行基于宽带振动的能量收集。与传统的谐振系统相比，这些双稳态非线性器件具有改进发电的潜力，并且可以设计成比双稳态磁悬臂系统占用更小的体积。在本文中，我们首先介绍了一项优化研究的结果，该研究通过发现基于器件静态的能量收集的正确几何结构来产生更大的电能。结果考虑了器件长宽比、层压厚度、层压顺序和压电表面积的最优选择。发现几何形状和压电结构的电输出增加了，这是以前没有考虑过的。然后，该研究扩展到包括静态形状和快速过渡的动态考虑。最佳设计被证明是敏感的振动模式，正在收获。仅基于静态分析的最优几何构型在所有动态条件下都不是最优的。
This paper presents an arrangement of bistable composite plates with bonded piezoelectric patches to perform broadband vibration-based energy harvesting from ambient mechanical vibrations. These bistable nonlinear devices have the potential to exhibit improved power generation compared to conventional resonant systems and can be designed to occupy smaller volumes than bistable magnetic cantilever systems. In this paper we initially present the results of an optimization study to generate greater electrical power by discovering the correct geometric configuration for energy harvesting based on the static states of the device. The results consider the optimal choice of device aspect ratio, laminate thickness, laminate stacking sequence, and piezoelectric surface area. Increased electrical output is found for geometries and piezoelectric configurations which have not been considered previously. This study is then extended to include dynamic considerations of both the static shapes and the snap-through transition. Optimum designs are shown to be sensitive to the vibration pattern that is being harvested. The optimum geometric configurations based on the static analysis alone are not optimal under all dynamic conditions.