负电容压电分流的圆环超构材料隔振  

Vibration isolation of a metamaterial ring arrayed with negative capacitance piezoelectric shunting

作　　者：林丽芳 陆泽琦 丁虎[1,2,3] 陈立群[1,2,3] LIN Lifang;LU Zeqi;DING Hu;CHEN Liqun(School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China;Shanghai Key Laboratory of Ener-gy Engineering Mechanics,Shanghai University,Shanghai 200444,China;Shanghai Institute of Applied Mathematics and Mechan-ics,Shanghai 200072,China)

机构地区：[1]上海大学力学与工程科学学院,上海200444 [2]上海大学上海市能源工程力学重点实验室,上海200444 [3]上海市应用数学和力学研究所,上海200072

出　　处：《哈尔滨工程大学学报》2022年第9期1320-1327,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(11872037)。

摘　　要：针对共振结构宽频振动控制不足,本文研究了力电耦合超构材料的振动隔离特性。以超构材料存在带隙特性为出发点,设计了一种周期性铺设有压电纤维片的圆环超构材料,外接负电容分流电路以实现振动衰减作用。建立了超材料圆环的动力学方程,并通过有限元仿真软件验证了其衰减特性。发现圆环超构材料出现局域共振带隙,负电容分流电路的加入不仅在一定程度上拓宽带隙,且其减振效果十分显著。Aiming at the shortage of broadband vibration control of resonant structures,we studied the vibration isolation characteristics of electromechanically coupled metamaterials and designed a metamaterial ring periodically arrayed with piezoelectric fiber sheets connected with negative capacitance piezoelectric shunting to realize the vibration attenuation effect based on the band gap property of the metamaterials.The dynamical equations of the metamaterial ring were established,and the attenuation characteristics were verified using the finite element method.The metamaterial ring was found to have a local resonant band gap,and introducing the negative capacitance piezoelectric shunting not only widened the band gap to a certain extent but also exhibited a significant damping effect.

关 键 词：隔振 超材料 圆环结构 负电容 压电分流电路 局域共振 频响函数 带隙 

分 类 号：O328[理学—一般力学与力学基础]