Theoretical and experimental study of a bi-stable piezoelectric energy harvester under hybrid galloping and band-limited random excitations

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外文摘要：In the practical environment,it is very common for the simultaneous oc-currence of base excitation and crosswind.Scavenging the combined energy of vibration and wind with a single energy harvesting structure is fascinating.For this purpose,the effects of the wind speed and random excitation level are investigated with the stochastic averaging method(SAM)based on the energy envelope.The results of the analytical prediction are verified with the Monte-Carlo method(MCM).The numerical simulation shows that the introduction of wind can reduce the critical excitation level for triggering an inter-well jump and make a bi-stable energy harvester(BEH)realize the performance enhancement for a weak base excitation.However,as the strength of the wind increases to a particular level,the influence of the random base excitation on the dynamic responses is weakened,and the system exhibits a periodic galloping response.A comparison between a BEH and a linear energy harvester(LEH)indicates that the BEH demonstrates inferior performance for high-speed wind.Relevant experiments are conducted to investigate the validity of the theoretical prediction and numerical simulation.The experimental find-ings also show that strong random excitation is favorable for the BEH in the range of low wind speeds.However,as the speed of the incoming wind is up to a particular level,the disadvantage of the BEH becomes clear and evident.

外文关键词：

bi-stabilityinter-well responsegallopingband-limited random

作者：

Haitao LI、Tianyu ZHENG、Weiyang QIN、Ruilan TIAN、Hu DING、J.C.JI、Liqun CHEN

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作者单位：

Department of Engineering Mechanics,North University of China,Taiyuan 030051,China

Department of Engineering Mechanics,Northwestern Polytechnical University,Xi'an 710072,China

Department of Engineering Mechanics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China

Shanghai Key Laboratory of Mechanics in Energy Engineering,Shanghai Frontier Science Center of Mechnoinformatics,Shanghai Institute of Applied Mathematics and Mechanics,School of Mechanics and Engineering Science,Shanghai University,Shanghai 200072,China

School of Mechanical and Mechatronic Engineering,University of Technology Sydney,New South Wales 2007,Australia

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基金：

国家自然科学基金国家自然科学基金国家自然科学基金Opening Foundation of Shanxi Provincial Key Laboratory for Advanced Manufacturing Technology of ChinaShanxi Provincial Graduate Innovation Project of China

项目编号：

122723551202520411902294XJZZ2023042023KY629

出版年：

2024

DOI：

10.1007/s10483-024-3098-5

应用数学和力学(英文版)

上海大学

应用数学和力学(英文版)

影响因子：0.294

ISSN：0253-4827

年,卷(期)：2024.45(3)

参考文献量54