阻流体对涡致振动压电俘能结构性能影响的研究  

Research on influence of bluff body on performance of vortexinduced vibration piezoelectric energyharvesting structures

作　　者：马雄飞 林杉杉 陈鹏 李莉 MA Xiongfei;LIN Shanshan;CHEN Peng;LI Li(School of Computer Science and Technology,Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学计算机科学与技术学院,辽宁沈阳110142

出　　处：《传感器与微系统》2024年第2期33-36,40,共5页Transducer and Microsystem Technologies

基　　金：辽宁省自然科学基金指导计划资助项目(2019—ZD—0075);辽宁省教育厅基础研究项目(LJ2020022);北京信息科技大学北京市传感器重点实验室开放项目(2020CGKF005)。

摘　　要：利用有限元分析方法对内置压电悬臂梁的柔性圆管俘能结构进行了水下环境的数值模拟和实验测试,并进行了对比分析。分别仿真分析和实验测试了前置阻流体形状和直径等条件参数对压电悬臂梁柔性圆管俘能结构性能的影响。仿真结果表明:前置圆柱形阻流体的俘能结构振幅和电压比前置六棱柱和方柱的俘能结构都大。当流速为1.0 m/s,前置圆柱阻流体直径为0.03 m时,俘能结构产生的振幅和电压最大分别为2.85×10^(-4)m, 9.88 V。实验结果与数值模拟结果呈现相同的变化趋势。当流速为1.0 m/s,刚性圆柱阻流体直径为0.03 m时,测得输出电压峰—峰值为5.63 V。通过数值模拟和实验测试,分析了阻流体形状和直径对俘能结构性能的影响,为水下涡致振动压电能量收集技术提供了理论和实验参考。Using finite element analysis method,the numerical simulation and experimental test of the underwater environment of the flexible circular tube energy-capturing structure of built-in piezoelectric cantilever beam are carried out,and the comparative analysis is carried out.The effects of conditional parameters such as the shape and diameter of the pre-bluff body on the performance of the energy capture structure flexible circular tube of piezoelectric cantilever are simulated and experimentally tested,respectively.The simulation results show that the amplitude and voltage of the energy-harvesting structure of the cylindrical pre-bluff body are larger than those of the pre-hexagonal and square column energy-harvesting structures.When the flow rate is 1.0 m/s,and the diameter of the cylindrical pre-bluff body is 0.03 m,the maximum amplitude and voltage generated by the energy capture structure are 2.85×10-4 m and 9.88 V,respectively.The experimental results show the same trend as the numerical simulation results.When the flow rate is 1.0 m/s and the diameter of the rigid cylindrical bluff body is 0.03 m,the measured peak-to-peak value of output voltage is 5.63 V.Through numerical simulation and experimental test,the influence of the shape and diameter of the bluff body on the performance of the energy-harvesting structure is analyzed,which provides a theoretical and experimental reference for the underwater vortex-induced vibration piezoelectric energy harvesting technology.

关 键 词：涡致振动 压电能量收集 压电俘能器 有限元仿真 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TM619[自动化与计算机技术—控制科学与工程]