Experiment Study and Finite Element Analysis of Cantilever Beam
Piezoelectric Energy Harvesting Device

doi:10.3969/j.issn.1674-0696.2017.12.19

Abstract

Abstract: The excited experiments for unimorph and bimorph piezoelectric cantilever beams were carried out. The first order natural frequencies of four piezoelectric cantilevers were determined，and the voltage and power response curves of each structure under different frequencies were obtained with the increase of load resistance. The experiments indicate that these piezoelectric cantilever beams can export the maximum voltage and power when the excited frequency is matched with the natural frequency of piezoelectric cantilever beams. Then the structure models of the piezoelectric cantilever beams were simulated by COMSOL software. The results of the output voltage and power of FEM are consistent with the experiments. A multi-cantilever piezoelectric energy harvester was proposed to deal with the vibrational energy dissipation in marine diesel engine. Frequency domain analysis of the harvester was carried out by COMSOL. The results show that this harvester can achieve a good and stable output power from marine diesel engine in multiple main vibration frequency.

Key words: marine engineering, piezoelectricity, finite element analysis, energy harvesting, marine diesel engine

摘要： 对单双晶压电悬臂梁进行激振实验，确定了4种压电悬臂梁的一阶固有频率，得出每种结构在不同频率下随着负载电阻增加的电压和功率响应曲线，实验表明激振频率与压电悬臂梁固有频率相当时，其输出电压达到最大，输出功率也达到最大。然后釆用COMSOL软件对压电悬臂梁结构模型进行了仿真分析，结果表明其输出电压，功率等有限元分析结果与实验结果吻合。针对船舶上柴油机工作时产生的振动能量耗散，提出1种多悬臂梁式的压电能量收集装置，利用COMSOL对结构进行频域分析，结果表明该结构能在船舶柴油机多个主振动频率上都达到较好、稳定的输出功率。

关键词: 船舶工程, 压电, 有限元, 能量收集, 船舶柴油机

CLC Number:

U664.1
TN384

ZHANG Min，ZHANG Hongxin，LEI Lin，LIU Yongzhen，ZHANG Lin. Experiment Study and Finite Element Analysis of Cantilever Beam Piezoelectric Energy Harvesting Device[J]. Journal of Chongqing Jiaotong University(Natural Science), 2017, 36(12): 115-120.

张敏，张鸿鑫，雷林，刘永臻，张林. 悬臂梁式压电能量收集装置的实验研究和有限元分析[J]. 重庆交通大学学报（自然科学版）, 2017, 36(12): 115-120.

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Experiment Study and Finite Element Analysis of Cantilever Beam Piezoelectric Energy Harvesting Device

悬臂梁式压电能量收集装置的实验研究和有限元分析

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