Harvesting base vibration energy by a piezoelectric inverted beam with pendulum

作     者：Jia-Nan Pan Wei-Yang Qin Wang-Zheng Deng Hong-Lei Zhou 潘家楠;秦卫阳;邓王蒸;周红磊

作者机构：Department of Engineering MechanicsNorthwestern Polytechnical University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2019年第28卷第1期

页      面：594-607页

核心收录：

学科分类：08[工学] 080101[工学-一般力学与力学基础] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11672237) 

主　　题：stochastic excitation energy harvesting inverted piezoelectric beam pendulum bi-stable state 

摘      要：We proposed a two-degrees-of-freedom inverted piezoelectric beam with pendulum to promote the performance of vibration energy harvesting. This configuration is composed of an inverted elastic beam and a pendulum attached to its free end. The electromechanical equations governing the nonlinear system were derived. The harmonic balance method(HBM)is applied to solve the equation and the results prove that there exists a 1:3 super-harmonic resonance. The simulation results show that owing to the particular nonlinearity, there appears a special bending effect in the amplitude-frequency response, i.e., bending right for the first natural frequency and left for the second natural frequency, which is beneficial for harvesting vibration energy. The HBM results are verified by the entity simulations. Furthermore, over a relatively wide range of power spectral density, it could reach a dense jumping and give a dense high pulse voltage.