基于涡致振动的剪切模式压电俘能结构的数值模拟  

Numerical simulation of piezoelectric energy harvesting structures in shear mode based on vortex-induced vibration

作　　者：王永耀 李莉 于慧慧 马雄飞 陈鹏 WANG Yongyao;LI Li;YU Huihui;MA Xiongfei;CHEN Peng(College 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》2023年第3期36-39,44,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：提出了一种基于水下涡致振动的夹心式剪切模式压电俘能结构。将压电片夹在两金属板中间,金属板上端连接阻流圆管,金属板在振动过程会产生相对位移,使夹在中间的压电片产生切变,进而将机械能转换为电能。分别对前置阻流体的单个压电俘能结构和前置阻流体的2个串列压电俘能结构,进行了流固耦合与压电耦合数值模拟,分析对比2种情况下的涡致振动能量收集性能。研究结果表明:2种情况下,压电俘能结构的振幅响应和电压均随着流速的增大而增大,在流速为1.2 m·s^(-1),中心距为5D时,产生的振幅和电压最大,单俘能结构情况下为6.743 2×10^(-4)m,两个俘能结构串列情况下,上游为7.241 5×10^(-4)m, 13.347 V,下游为1.942 6×10^(-4)m, 3.551 2 V。A sandwich shear mode piezoelectric energy harvester structure based on underwater vortex-induced vibration is proposed.The piezoelectric plate is clamped between two metal plates, and the upper end of the metal plate is connected with a choked flow circular tube.During the vibration process, the two metal plates will generate relative displacement, so that the piezoelectric plate clamped in the middle generates shear, and then, the mechanical energy is converted into electrical energy.The fluid-solid coupling and piezoelectric coupling numerical simulation are carried out for a single piezoelectric energy harvester structure of a pre-resistive fluid and two tandem piezoelectric energy harvester structures of a pre-resistive fluid, respectively.The energy harvesting performance of vortex-induced vibration under the two conditions is analyzed and compared.Research results show that the amplitude response and voltage of the piezoelectric energy harvester structure increase with the increase of the current velocity.When the current velocity is 1.2 m·s^(-1)and the center distance is 5D,the amplitude and voltage are the largest, which are 6.743 2×10^(-4)m in the case of single energy harvesting structure, and in the case of two energy harvesting structures in tandem, the upstream is 7.241 5×10^(-4)m and 13.347 V,and the downstream is 1.942 6×10^(-4)m and 3.551 2 V.

关 键 词：涡致振动 压电能量收集 流固耦合 压电耦合 d15模式 

分 类 号：TM619[电气工程—电力系统及自动化]