基于介电弹性体能量采集的机械振动实验设计  

Experimental design of mechanical vibration based on energy collection of dielectric elastomers

作　　者：赵德敏 杜洪泽 肖奥宇 ZHAO Demin;DU Hongze;XIAO Aoyu(College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266580

出　　处：《实验技术与管理》2024年第12期193-198,共6页Experimental Technology and Management

基　　金：国家自然科学基金面上项目(12372027);山东省自然科学基金项目(ZR2022MA086);中央高校基本科研业务费项目(23CX03010A);中国石油大学教学改革项目(YJG2021007)。

摘　　要：将具有清洁能源开发和新型智能材料等背景的介电弹性体(DE)能量采集结构引入“机械振动”创新性实验项目。设计了锥形DE能量采集结构,基于分数阶阻尼的黏-超弹DE膜材料模型,建立了锥形结构的动力学模型。在未施加电场情况下,通过位移响应的幅频特性曲线,对超弹性DE本构模型与黏-超弹本构模型进行了对比,结果表明,黏-超弹本构模型与实验结果更为吻合。在施加电场情况下,测试了输出电压,黏-超弹本构模型理论预测输出电压与实验测试输出电压基本吻合。该实验案例有助于激发学生的学习兴趣,培养学生的创新能力。[Objective]Carbon peaking and carbon neutrality are global trends,and developing renewable and clean energy is an important demand for many countries.Wave energy is one of the renewable energy in the ocean,whose total storage is much greater than that of solar energy and the wind energy on the earth's surface.Furthermore,wave energy has the advantages of high energy density,wide distribution,and minimal negative impact on the environment.Therefore,collecting wave energy is one of the current popular research topics in the world.Dielectric elastomer(DE),an intelligent soft material,has many potential applications in various fields,such as soft robots,phononic crystals,loudspeakers,tactile displays,resonators,and energy harvesting.In addition,it belongs to the category of rubber materials,thus,the hyperelastic constitutive model is generally utilized to describe the large deformation of DE.However,it is experimentally observed that viscoelasticity can dramatically affect the mechanical performance of DE.Although there is relatively limited research on the fractional order viscoelastic theory of DE material,this paper introduces a DE energy harvesting structure with the background of collecting wave energy into innovative experimental projects involving mechanical vibration.[Methods]A conical DE energy harvesting structure is designed,and a viscoelastic–hyperelastic constitutive model based on fractional order damping is developed to establish a dynamic model of the conical DE structure.The dynamic behaviors,such as vibration displacement,amplitude-frequency character,and output voltage,are all studied by theory and experiments.The L1 numerical difference method combined with the Runge–Kutta method is adopted for the simulation of the Caputo fractional derivative.To study more deeply,the laboratory experiments are carried out considering both the absence and the application of an electric field.First,in the absence of an electric field,the amplitudefrequency characteristic curve of the displacement response is u

关 键 词：介电弹性体 能量采集 机械振动 振动实验 

分 类 号：O329[理学—一般力学与力学基础] G642.0[理学—力学]