期刊文献+

磁力增强涡激振动压电俘能器仿真及实验 被引量:1

Simulation and Experiment of Vortex-Induced Vibration Energy Harvester with Magnet Enhancement
下载PDF
导出
摘要 为了提高低流速水流环境的俘能特性,基于涡激振动原理和压电振动能量采集技术,提出一种磁力增强涡激振动俘能器。该俘能器由压电层合悬臂梁、尾端圆柱绕流体和磁铁组成。首先,通过流-固-电耦合有限元仿真,分析了无附加磁力涡激振动压电俘能器的俘能特性,可知其低流速环境下俘能效率较低;其次,搭建流致振动俘能器实验平台,研究了磁力增强俘能器的俘能特性。实验结果表明:在横斥纵吸磁铁布置情况下,压电俘能器结构的固有频率较低,在较低流速下更容易起振,且达到涡激共振所需的流速范围较低;在磁场力的作用下其振动变形较大,输出电压较高,振动频带较宽;当水流流速为0.5 m/s时,磁力增强压电俘能器的输出功率均方根值达到120μW,较无附磁情况的压电俘能器提高了57.8%,这表明横斥纵吸附磁式涡激振动压电俘能器在较低流速流场环境中具有更高的俘能效率。 Based on the vortex-induced vibration theory and piezoelectric energy harvesting technology,a magnet-enhancement vortex-induced vibration energy harvester(VEH)is proposed,which is more conducive to improve the energy harvesting efficiency for low-velocity water flow. The proposed energy harvester consists of a piezoelectric laminated cantilever beam,a cylindrical bluff body and magnets. First,the energy harvesting characteristics of vortex-induced VEH without additional magnetic force are analyzed by fluid-solid-electrical coupling finite element simulation. Results show that the energy harvesting efficiency is lower in low flow velocity environment. The experimental platform of flow-induced vibration energy harvesting is built,and the energy capture characteristics of magnet-enhancement energy harvester are discussed in detail. Experimental results show that the natural frequency of the piezoelectric energy harvester with transverse repulsion and longitudinal magnetic arrangement is lower,which means that it is easier to vibrate at lower flow velocity and occur vortexinduced resonance. Under the effects of magnetic force,the vibration deformation becomes larger,the output voltage coupled with the vibration frequency bandwidth are therefore improved. As a result,the maximum of output power of the proposed harvester is 120 μW at the flow velocity 0.5 m/s,which is 57.8% higher than that of the VEH without magnet. It shows that the transverse repulsion and longitudinal adsorption magnetic vortex-induced VEH has advances to improving the energy capture efficiency for the lower flow velocity environment.
作者 曹东兴 丁相栋 张伟 姚明辉 CAO Dongxing;DING Xiangdong;ZHANG Wei;YAO Minghui(Faculty of Materials and Manufacturing,Beijing University of Technology Beijing,100124,China;Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures Beijing,100124,China;School of Artificial Intelligence,Tianjin Polytechnic University Tianjin,300387,China)
出处 《振动.测试与诊断》 EI CSCD 北大核心 2022年第3期530-536,619,共8页 Journal of Vibration,Measurement & Diagnosis
基金 国家自然科学基金资助项目(11672008,11972051)。
关键词 振动能量采集 涡激振动 流固耦合 磁力增强 vibration energy harvesting vortex-induced vibration fluid-structure interaction magnet-enhancement
  • 相关文献

参考文献9

二级参考文献40

共引文献88

同被引文献14

引证文献1

二级引证文献1

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部