文章基本信息

标题：Numerical Investigations into the Effects of Multiple Parameters on Nonlinear Piezoelectric Vibration Energy Harvesters
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作者：Zhongsheng Chen ; Bin Guo ; Yanting Luo 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2014
卷号：2014
DOI：10.1155/2014/604704
出版社：Sage Publications Ltd.
摘要：It is very promising to improve the performance of piezoelectric vibration energy harvesters (PVEHs) using nonlinearities in energy harvesting applications. However it is almost impossible to analytically obtain their nonlinear dynamic behaviors. The goal of this paper is to investigate the relations among power outputs, vibration characteristics, and systematic nonlinearities by numerical analysis. A mathematical model of nonlinear PVEH is built by combining nonlinear damping, stiffness, and piezoelectric coupling coefficient. An iterative algorithm is proposed to solve the nonlinear model. Then the effects of these nonlinear parameters on the performance of the PVEH are studied deeply. The results demonstrate that the power output of a nonlinear PVEH will be overestimated or subestimated using a linear model. And nonlinearities can be used for broadband and low frequency vibration energy harvesting.