两自由度悬臂梁压电发电装置的宽频发电性能

刘祥建; 朱莉娅; 陈仁文

doi:10.3788/OPE.20162407.1669

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两自由度悬臂梁压电发电装置的宽频发电性能

微纳技术与精密机械 | 更新时间：2020-08-13

- 两自由度悬臂梁压电发电装置的宽频发电性能
- Broadband generation performance of two-degree-of-freedom cantilever beam piezoelectric generator
- 光学精密工程 2016年24卷第7期页码：1669-1676
- 作者机构：
  
  1.金陵科技学院机电工程学院, 江苏南京 211169
  2.南京师范大学江苏省三维打印装备与制造重点实验室, 江苏南京 210042
  3.南京航空航天大学机械结构力学及控制国家重点实验室, 江苏南京 210016
- 作者简介：
  
  [ "刘祥建(1980-), 男, 山东五莲人, 博士, 副教授, 2012年于南京航空航天大学获得博士学位, 主要从事振动能量收集技术方面的研究。E-mail:xiangjianliu@126.com" ]
  朱莉娅(1986-), 女, 江苏徐州人, 博士, 讲师, 2012年于南京航空航天大学获得博士学位, 主要从事振动能量收集、三维打印等方面的研究。E-mail:julia_860527@163.comE-mail:julia_860527@163.com
- 基金信息：
  
  国家自然科学基金项目(51305183);江苏省高校自然科学研究面上项目(14KJB480004);江苏省“青蓝工程”资助项目(2014);金陵科技学院博士科研启动基金项目(jit-b-201412)
- DOI：10.3788/OPE.20162407.1669
  中图分类号： TN384;TM619
- 收稿日期：2016-01-28，
  
  纸质出版日期：2016-07
- 稿件说明：
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刘祥建, 朱莉娅, 陈仁文. 两自由度悬臂梁压电发电装置的宽频发电性能[J]. 光学精密工程, 2016,24(7):1669-1676.

Xiang-jian LIU, Li-ya ZHU, Ren-wen CHEN. Broadband generation performance of two-degree-of-freedom cantilever beam piezoelectric generator[J]. Optics and precision engineering, 2016, 24(7): 1669-1676.
刘祥建, 朱莉娅, 陈仁文. 两自由度悬臂梁压电发电装置的宽频发电性能[J]. 光学精密工程, 2016,24(7):1669-1676. DOI： 10.3788/OPE.20162407.1669.

Xiang-jian LIU, Li-ya ZHU, Ren-wen CHEN. Broadband generation performance of two-degree-of-freedom cantilever beam piezoelectric generator[J]. Optics and precision engineering, 2016, 24(7): 1669-1676. DOI： 10.3788/OPE.20162407.1669.

摘要

研究一种两自由度悬臂梁压电发电装置，以提高悬臂梁式压电发电装置在环境振源振动频率波动情况下的发电能力。建立了两自由度悬臂梁压电发电装置的频率特性理论模型，并对该理论模型进行了有限元仿真验证，结果显示理论计算与有限元仿真结果基本一致。对两自由度悬臂梁压电发电装置的频率特性模型进行了数值模拟，模拟显示：装置的前两阶模态频率比随着长度比、宽度比、厚度比及质量块的质量比的增大均出现一个最小值，且在长度比为0.8，宽度比为2.0，厚度比为1.0，质量块的质量比为0.5时，装置的前两阶模态频率比最小，结果表明通过合理设计两自由度悬臂梁压电发电装置的结构参数，可以使得装置的前两阶模态频率最接近。最后，实例设计了两自由度悬臂梁压电发电装置，并进行了试验测试，证实了优化后的两自由度悬臂梁压电发电装置具有宽频带发电能力。

Abstract

A two-degree-of-freedom cantilever beam piezoelectric generator was explored to improve the generation performance of the cantilever beam piezoelectric generator under the variety of the ambient vibration energy sources. The theoretical model of the frequency characteristics of the two-degree-of-freedom cantilever beam piezoelectric generator was established and finite element analysis was performed for the proposed theoretical model. The theoretical results show that the theoretical analysis and finite element simulation are in agreement well. A numerical simulation was carried out for the frequency characteristic model of the two-degree-of-freedom cantilever beam piezoelectric generator and the results show that the ratio of the 1st modal frequency to the 2nd modal frequency will be a minimum value with the increase of the length ratio

width ratio

thickness ratio and the mass ratio

and the minimum value of the ratio of the 1st modal frequency to the 2nd modal frequency can be obtained at the length ratio of 0.8

width ratio of 2.0

thickness ratio of 1.0

and the mass ratio of 0.5. The results demonstrate that the frequency-band of the two-degree-of-freedom cantilever beam piezoelectric generator is expanded by optimizing the structure parameters to reduce the distance between the 1st modal frequency and the 2nd modal frequency. Finally

the two-degree-of-freedom cantilever beam piezoelectric generator was designed and the broadband generation performance of the generator verified.

关键词

Keywords

references

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