摘要
本文提出了应用于流体环境的圆柱体结构压电能量收集吸振器,研究在涡激振动下实现结构振动抑制和压电能量收集一体化策略。首先采用数值方法研究了减振器对涡激振动系统的被动振动抑制效果,并采用增量谐波平衡法获得了涡激振动能量采集器的半解析周期解,依据Floquet理论确定了周期解的稳定性。研究发现,在涡激振动系统的锁定区内,非线性流固耦合效应可诱导多解共存非线性动力学行为。当系统配置线性吸振装置时,系统的多解共存现象消失,振动主频不再固定于结构固有频率,其值随风速呈现逐渐递增的趋势。另外,分析了线性减振器的尖端钝体质量,以及内梁的长度、宽度和厚度等参数对主结构幅值变化吸振器电压输出的影响规律,系统对比评价了相关参数对减振效果的作用,明确了线性减振器高效设计的参数可选区间。
This study proposed a novel piezoelectric energy harvesting dynamic vibration absorber(DVA)integrated into cylindrical structures subjected to fluid flow,and aimed to achieve simultaneous vortexinduced vibration suppression and piezoelectric energy harvesting.Firstly,numerical simulations were employed to investigate the passive vibration suppression effectiveness of the dynamic vibration absorber on the vortex-induced vibration system.Subsequently,the incremental harmonic balance(IHB)method was adopted to derive semi-analytical periodic solutions for the vibration energy harvester,with the solution stability analyzed via Floquet theory.The study reveals that within the lock-in range of the vortexinduced vibration system,nonlinear fluid-structure interaction(FSI)effects can induce coexisting multiple solutions and complex nonlinear dynamic behaviors.Notably,when the system is equipped with a linear vibration absorber,the system exhibits eliminated coexisting solutions and a dominant vibration frequency that monotonically increases with wind speed,rather than remaining locked to the structural natural frequency.Furthermore,a parametric study evaluates key design variables such as the tip mass of the bluff body and beam dimensions on vibration mitigation performance.This work quantifies both the primary structure’s amplitude attenuation and the DVA’s voltage output,and establishes optimal parameter ranges for high-efficiency linear DVA design.
作者
卢雨夕
岳浩洋
李海涛
宋妮
LU Yuxi;YUE Haoyang;LI Haitao;SONG Ni(School of Mathematics,North University of China,Taiyuan 030051,China;School of Aerospace Engineering,North University of China,Taiyuan 030051,China)
出处
《中北大学学报(自然科学版)》
2025年第6期827-838,共12页
Journal of North University of China(Natural Science Edition)
基金
国家自然科学基金资助项目(12372026)
山西省回国留学人员科研资助项目(2022-150)
山西省自然科学基金资助项目(202203021211086)。
关键词
涡激振动
能量收集
增量谐波平衡法
周期解
频率锁定
vortex-induced vibration
energy harvesting
incremental harmonic balance method
periodic solutions
frequency lock-in
