声波反射法测量电流变液参数  

Measurement of electrorheological fluid parameters by acoustic reflection method

作　　者：齐明燕 滕旭东[1] 王晓彧 QI Mingyan;TENG Xudong;WANG Xiaoyu(Shanghai University of Engineering Science,School of Electronic and Electrical Engineering,Shanghai 201610,China;Nanjing Vocational University of Industry Technology College of Aeronautical Engineering,Nanjing 210023,Jiangsu,China)

机构地区：[1]上海工程技术大学电子电气工程学院,上海201610 [2]南京工业职业技术大学航空工程学院,江苏南京210023

出　　处：《声学技术》2023年第2期152-155,共4页Technical Acoustics

摘　　要：电流变(Electrorheological,ER)液是一种新型智能材料,在外部电场作用下其物理特性可调节。文章设计了一种电流变液的声学测量系统,利用声波反射法测量电流变液的反射系数和相位差,根据声阻抗率与弹性模量关系,得到电流变液储能模量、耗能模量和损耗角等参数。实验结果表明:声阻抗率、储能模量和损耗角等参数与所施加外部电场的电压有关,采用电极绝缘漆处理工艺能有效兼顾电流变液对较大剪切应力和快速响应时间的性能要求。Electrorheological Fluid(ERF)is a kind of novel intelligent material with adjustable physical parameters under the action of an applied electric field.By applying different electrical voltages,the storage modulus,loss modulus and loss angle of ERF change simultaneously.In this paper an acoustic impedance measuring system based on ultrasonic(shear)wave reflection method is designed to measure such changes of ERF parameters.Furthermore,the relationships between viscoelastic parameters obtained by acoustical impedance and electrical field intensity can be determined and analyzed so as to realize accurate control for ERF.In addition,the processing technology involved with electrode insulation is tested to explain its influence on measuring acoustic impedance and loss modulus of ERF.

关 键 词：电流变液 声反射法 声阻抗率 

分 类 号：TB52[理学—物理]