Simply-supported multi-layered beams for energy harvesting
Simply-supported multi-layered beams for energy harvesting
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DOI：
10.1177/1045389x16657418
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发表时间：
2017-04-01
影响因子：
2.7
通讯作者：
Popov, Atanas A.
中科院分区：
文献类型：
--
作者：
Patel, Rupesh;Tanaka, Yoshikazu;Popov, Atanas A.
本文建立了一个分析模型，用于预测简支多层压电振动能量采集器的性能。该模型包括材料和几何非线性的影响，以及轴向预拉伸/压缩，并验证对实验装置的基础加速度的大范围。进行数值和实验研究，以了解使用简单的支持设备相比，悬臂式设备的好处。比较是在一个公正的方式通过调整谐振频率相同的值，通过修改的几何形状，得到的结果表明，简单的支持设备能够产生更高的电压水平比悬臂式设备。该模型也被用来调查使用多层器件，以提高功率密度的好处。取决于采集器组成，用于装置的压电材料的每单位体积的功率通过层的堆叠而增加。
This paper develops an analytical model for predicting the performance of simply-supported multi-layered piezoelectric vibrating energy harvesters. The model includes the effects of material and geometric non-linearities, as well as axial pre-tension/compression, and is validated against experimental devices for a large range of base accelerations. Numerical and experimental investigations are performed to understand the benefits of using simply-supported devices compared to cantilevered devices. Comparisons are made in an unbiased manner by tuning the resonant frequency to the same value by modifying the geometry, and the results obtained indicate that simply-supported devices are capable of generating higher voltage levels than cantilever devices. The model is also used to investigate the benefits of using multi-layered devices to improve power density. Depending on harvester composition, power-per-unit-volume of piezoelectric material for a device is increased through the stacking of layers.