基于周期性穿孔悬臂梁的压电俘能器数值仿真研究  

Numerical Simulation Analysis of Piezoelectric Energy Harvester Based on Periodic Perforated Cantilever

作　　者：崔新风 徐思朋[1] 黄孝清 牟恺宁 Cui Xinfeng;Xu Sipeng;Huang Xiaoqing;Mu Kaining(College of Engineering,Ocean University of China,Qingdao 266003,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266003

出　　处：《中国海洋大学学报（自然科学版）》2025年第1期158-165,共8页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(51879246);山东省自然科学基金项目(ZR2015AM002,ZR2019MEE056)资助。

摘　　要：针对海洋监测等小型传感器无法长期稳定供电问题,压电俘能器提供了一种新的解决方案。本文提出了一种基于周期性穿孔梁的压电俘能器,它可以有效地将清洁能源(如波浪能)中的振动能转化为电能。本文首先建立了压电能量俘获结构的机电频响函数模型;然后在理论分析基础上,对与穿孔基底层相关的参数进行了敏感度分析;最后采用有限元方法进行了数值仿真研究。研究结果表明,基底层的厚度和填充率同峰值电压的相关度最为显著,而穿孔数与峰值电压的相关度最不显著。基底层厚度减小、填充率减小和穿孔数增多都有助于降低谐振频率,并提高峰值电压输出。仿真结果表明,与传统无孔结构相比,穿孔结构的谐振频率最大降低了22.63%,而峰值电压最大提高了61.54%。To solve the problem that miniature sensors such as ocean monitoring cannot be powered stably for a long time,piezoelectric energy harvester provides a newway.In this paper,a piezoelectric energy harvester based on periodic perforated beam is proposed,which can convert the vibrational energy from clean energy sources such as waves into electrical energy.Firstly,the electromechanical frequency response function of the piezoelectric energy harvester is established.On the basis of the theoretical analysis,the sensitivity analysis of the parameters related to the perforated substrate is carried out.Finally,a numerical simulation analysis is conducted using the finite element method.The results show that the thickness and filling rate of the substrate have the highest correlation with the peak voltage,and the number of perforations has the lowest correlation with the peak voltage.The smaller the thickness and filling rate of the substrate and the more the number of perforations,the better it is to reduce the resonant frequency and increase the peak voltage.The simulation results show that the perforated structure reduces the resonant frequency by 22.63%and increases the peak voltage by 61.54%compared with the conventional non-perforated structure.

关 键 词：海洋传感器自供电 压电俘能器 周期性穿孔悬臂梁 参数敏感度 谐振频率 峰值电压 

分 类 号：TM619[电气工程—电力系统及自动化]