三稳态电磁式涡激振动俘能装置发电性能研究  

Power generation performance of tri-stable state electromagnetic VIV energy harvester

作　　者：吴子英[1] 常宇琛 赵伟 李永越 刘丽兰[1] WU Ziying;CHANG Yuchen;ZHAO Wei;LI Yongyue;LIU Lilan(School of Mechanical and Instrumental Engineering,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048

出　　处：《振动与冲击》2022年第13期26-33,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(15572243)。

摘　　要：涡激振动能量转换装置涉及水流-圆柱型钝体-发电机之间复杂的流固电耦合问题。将非线性回复力、单向离合器和齿轮齿条机构引入到涡激振动俘能装置中,提出了一种三稳态涡激振动俘能装置,实现了将钝体的往复振动转化为驱动转子发电机单向转动的传动方案,采用Van der Pol方程描述流固耦合,建立了力学模型和考虑流固电耦合动力学方程。借助数值仿真,与双稳态涡激振动俘能装置的动力学响应和发电功率进行对比,证明了三稳态涡激振动俘能装置的优势。进一步获得了俘能装置中质量比、钝体直径和负载电阻对发电功率的影响规律,给出了某一流速下俘能装置出现最大发电功率的最佳结构参数,最后分析了飞轮惯量大小对发电功率的影响。Vortex induced vibration(VIV)energy conversion device involves complex fluid-solid-electricity coupling problem of water flow-cylindrical blunt body-generator.Here,nonlinear restoring force,one-way clutch and gear rack mechanism were introduced into VIV energy harvester,and a tri-stable VIV energy harvester was proposed to realize reciprocating vibration of blunt body being converted into a transmission scheme to drive one-way rotation of rotor generator.Van der Pol equation was used to describe fluid-structure interaction,and establish the mechanical model and dynamic equations considering fluid-solid-electricity coupling.By means of numerical simulation,compared with dynamic response and generating power of bi-stable VIV energy harvester,advantages of tri-stable VIV energy harvester were proved.Influence laws of mass ratio,blunt body diameter and load resistance on generating power were further obtained.The optimal structural parameters of the energy harvester with the maximum generating power under a certain flow rate were deduced.Finally,effects of flywheel inertia moments on generating power were analyzed.

关 键 词：涡激振动 俘能装置 动力学响应 发电性能 三稳态 

分 类 号：O322[理学—一般力学与力学基础]