Optimization for cantilever piezoelectric energy harvester with a cavity

被引：1
|
作者：
Chen, L. H. [1 ,2 ]
Xue, J. T. [1 ,2 ]
Chang, L. Q. [1 ,2 ]
Yang, F. H. [3 ]
机构：
[1] Beijing Univ Technol, Coll Mech Engn, Beijing 100124, Peoples R China
[2] Key Lab Nonlinear Vibrat & Strength Mech Struct, Beijing 100124, Peoples R China
[3] Cent Univ Finance Econ, Sch Math & Stat, Beijing 100081, Peoples R China
来源：
2ND INTERNATIONAL CONFERENCE ON MATERIAL STRENGTH AND APPLIED MECHANICS | 2019年 / 629卷
基金：
中国国家自然科学基金;
关键词：
POWER; GENERATOR;
D O I：
10.1088/1757-899X/629/1/012027
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The structure optimization of piezoelectric energy harvester aims at frequency reduction, broadening bandwidth and increasing output mainly. This paper employs a cantilever with cavity modelled by the finite element software COMSOL Multiphysics and the effect of the cavity on transducer is studied. The first order characteristic frequency is obtained by modal analysis module and the frequency response curve is solved by frequency domain analysis module. Comparison results show that the introducing of cavity improves output voltage of energy harvester and reducing device nature frequency. Moreover, effect of the cavity size parameters such as the thickness, length and position on frequency, output and conversion rate of the harvester is studied, after that the energy harvester structure is optimized.
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页数：6
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