摘要
分析一种缺陷态压电超材料梁的减振和俘能特性,旨在超材料元胞中引入缺陷设计,使能量局域在缺陷处。使用COMSOLMultiphysics软件分析压电超材料梁的带隙和输出电压,通过减少第二元胞和第三元胞的基板厚度引入结构缺陷,分析单一元胞结构缺陷以及缺陷元胞所在位置对压电超材料梁减振和俘能特性的影响,并与常规压电超材料梁性能进行对比。结果表明,缺陷位置与激励源越近,局域的能量越多;当缺陷模态频率位于带隙内时,压电超材料梁能在传输系数小于零的情况下额外俘获峰值电压,此时压电超材料梁兼具同一缺陷模态频率下的减振和俘能双功能特性。
The properties of vibration reduction and energy harvesting are analyzed for a defected piezoelectric meatamaterial beam(PMMB).Due to the existance of the defect in a unit cell of the PMMB,the energy can be located in the defected unit cell.The soft COMSOL Multiphysics is used to analyze the band gap and the voltage output of a PMMB.By reducing the substrate thickness of the second unit cell and that of the third unit cell,separately,the effects of the defected structures on the vibration reduction and energy harvesting properties of the PMMB are studied and the results are compared with those of the perfect PMMB.The results showed that with a defect position closer to the excitation source,the defected unit cell can achieve higher voltage peak than other configurations.As the defect mode frequency is located in the band gap,it appears an additional voltage peak at this defect mode frequency but with a transmission coefficient lower than zero,which means it can achieve the dual functions at the defect mode frequency for simultaneous vibration reduction and energy harvesting.
作者
王红艳
王光雷
WANG Hong-yan;WANG Guang-lei(School of Mechanical and Electronic Engineering,Qiqihar University,Heilongjiang Qiqihar 161006,China;Heilongjiang Province Collaborative Innovation Center for Intelligent Manufacturing Equipment Industrialization,Heilongjiang Qiqihar 161006,China)
出处
《齐齐哈尔大学学报(自然科学版)》
2025年第1期1-5,26,共6页
Journal of Qiqihar University(Natural Science Edition)
基金
黑龙江省省属高等学校基本科研业务费科研项目(145109407)
黑龙江省自然科学基金资助项目(PL2024E036)。
关键词
压电超材料梁
缺陷
能量局域
减振
俘能
PMMB
defect
energy location
vibration reduction
energy harvesting
作者简介
王红艳(1974-),女,吉林扶余人,教授,博士,主要从事振动能量收集研究,wanghongyan1993@163.com。
