一种增强负泊松比结构的压电俘能器的设计与分析  

Design and analysis of a piezoelectric energy harvester with enhanced negative Poisson’s ratio structure

作　　者：陆亚平 时岩[1] 李文彬[1] 高强 LU Ya-ping;SHI Yan;LI Wen-bin;GAO Qiang(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;School of Mechanical Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]东南大学机械工程学院,江苏南京211189

出　　处：《振动工程学报》2024年第7期1182-1190,共9页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(52102421);航空科学基金资助项目(2022Z068069001)。

摘　　要：考虑到传统压电悬臂梁存在固有频率高,输出性能低的缺点,本文基于增强负泊松比结构设计了一种压电俘能器,在弹性基板中引入了负泊松比结构和X型肋骨。利用有限元方法建立了压电俘能器的动力学模型;通过数值方法进行了模态和压电耦合分析,并对增强负泊松比结构的俘能器进行了参数分析;搭建了实验平台,制作了压电俘能器样品,对输出性能进行验证。研究结果表明:与传统平板结构俘能器相比,增强负泊松比结构俘能器的一阶谐振频率低,输出电压和功率高,X型肋骨的加入提高了结构的刚度和非线性;相比于负泊松比结构的俘能器,X型肋骨的加入不仅改善了结构的疲劳性能,还拓宽了工作带宽。The existing rectangular piezoelectric cantilever beam has the shortcomings of high intrinsic frequency and low output performance.In this paper,a piezoelectric energy harvester based on the enhanced negative Poisson’s ratio structure is designed by combining a negative Poisson’s ratio structure and X-shaped ribs in an elastic substrate.The dynamics model of the energy harvest⁃er is established by using the finite element method for the piezoelectric coupling analysis and parametric analysis.The prototypes are fabricated to verify the design.The results show that the energy harvester based on enhanced negative Poisson’s ratio structure has a low first-order resonant frequency,high output voltage and power,and the addition of X-rib increases the stiffness and nonlin⁃earity of the structure.Compared with the conventional negative Poisson’s ratio structure,the introduction of X-rib not only im⁃proves the fatigue performance of the structure,but also broadens the bandwidth by 67.87%.The energy harvester based on en⁃hanced negative Poisson’s ratio structure is important for solving the power supply problem of wireless sensors and portable elec⁃tronic mobile devices in the future.

关 键 词：压电俘能器 负泊松比结构 性能分析 

分 类 号：TN384[电子电信—物理电子学] TN712.5