交指状电极结构仿真分析及其电场分布拟合
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摘要
电流变阻尼器由于采用平板式电极结构,在工作时负载的最高剪切速率较低,无法满足负载剪切速率较高的应用需求。现有研究结果表明,交指状电极结构改变了电场分布,提供了与剪切方向相平行的电场分量,有利于提高电流变阻尼器工作时的最高剪切速率,然而交指状电极结构的几何尺寸对其电场平行分量的影响规律尚不清晰,无法将交指状电极结构有效地应用于电流变阻尼器的设计。本文采用有限元分析软件COMSOL Multiphysics 5.2a仿真分析了交指状电极结构的空间静电场分布,研究了其几何尺寸对电场平行分量的绝对平均值的影响规律。仿真结果表明,电极宽度越小、电极间隙越大,空间电场的平行分量越大。为了更好地将仿真结果应用于基于交指状电极结构的电流变阻尼器的设计,对交指状电极结构的静电场仿真数据进行电场分布拟合,分析了拟合结果的可靠性,得到交指状电极结构的几何尺寸对其电场平行分量影响规律的数学表达式。研究结果可用于交指状电极结构的电流变阻尼器设计。
The damper using electrorheological fluid has lower shear rate load due to the use of plate electrodes configuration,which cannot meet the demands of applications with higher shear rate loads. The existing research results show that the interdigital electrodes configuration changes the distribution of electric field and provides the electric field component parallel to the shear direction,which is helpful to enhance the maximum shear rate load of an electrorheological damper. However,the effects of the geometric parameters on the parallel component of the electric field has not been figured out,and no rules can be used for the design of an electrorheological damper governed by an interdigital electrodes configuration. In this paper,the simulation of distributions of electrostatic field with a set of varying parameters of interdigital electrodes configuration has been carried out by the finite element software COMSOL Multiphysics 5. 2 a,the effects of geometric parameters on the parallel component of its electrostatic field is studied,and simulation shows that the smaller the width of electrodes is and the bigger the gap of electrodes is,the higher the value of parallel component of electrostatic field is. Surface fitting of distributions of parallel component of electrostatic field with interdigital electrodes configuration is made by Matlab and validation of this work is verified. A polynomial function is acquired to show the effects of geometric parameters of interdigital electrodes configuration on the parallel component of its electrostatic field. These results can be used for the design of an electrorheological damper with an interdigital electrodes configuration.
The damper using electrorheological fluid has lower shear rate load due to the use of plate electrodes configuration,which cannot meet the demands of applications with higher shear rate loads. The existing research results show that the interdigital electrodes configuration changes the distribution of electric field and provides the electric field component parallel to the shear direction,which is helpful to enhance the maximum shear rate load of an electrorheological damper. However,the effects of the geometric parameters on the parallel component of the electric field has not been figured out,and no rules can be used for the design of an electrorheological damper governed by an interdigital electrodes configuration. In this paper,the simulation of distributions of electrostatic field with a set of varying parameters of interdigital electrodes configuration has been carried out by the finite element software COMSOL Multiphysics 5. 2 a,the effects of geometric parameters on the parallel component of its electrostatic field is studied,and simulation shows that the smaller the width of electrodes is and the bigger the gap of electrodes is,the higher the value of parallel component of electrostatic field is. Surface fitting of distributions of parallel component of electrostatic field with interdigital electrodes configuration is made by Matlab and validation of this work is verified. A polynomial function is acquired to show the effects of geometric parameters of interdigital electrodes configuration on the parallel component of its electrostatic field. These results can be used for the design of an electrorheological damper with an interdigital electrodes configuration.
引文
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[2]Mavroidis C,Pfeiffer C,Celestino J,et al.Controlled compliance haptic interface using electro-rheological fluids[A].Smart Structures and Materials 2000:Electroactive Polymer Actuators and Devices[C].Bellingham,USA,2000.3987:300-310.
[3]Sakaguchi M,Furusho J,Takesue N.Passive force display using ER brakes and its control experiments[A].Proceedings IEEE Virtual Reality 2001[C].Yokohama,Japan,2001.7-12.
[4]Tian Y,Meng Y,Mao H,et al.Electrorheological fluid under elongation,compression,and shearing[J].Physical Review E,2002,65(3):031507.
[5]尹剑波,赵晓鹏(Yin Jianbo,Zhao Xiaopeng).电场调控的智能软材料(Smart soft materials tuned by electric fields)[M].北京:科学出版社(Beijing:Science Press),2010.
[6]Liu Liyu,Huang Xixiang,Shen Cai,et al.Parallel-field electrorheological clutch:Enhanced high shear rate performance[J].Applied Physics Letters,2005,87(10):104106.
[7]Sheng Ping,Wen Weijia.Electrorheology:Statics and dynamics[J].Solid State Communications,2010,150(21-22):1023-1039.
[8]Halsey T C.Electrorheological fluids[J].Science,1992,258(5083):761-766.
[9]赵晓鹏,罗春荣,周本濂(Zhao Xiaopeng,Luo Chunrong,Zhou Benlian).ER流体特性及其研究现状(Characteristics of ER fluids and its current status)[J].材料科学与工程(Materials Science and Engineering),1993,11(4):1-6.
[10]Winslow W M.Induced fibration of suspensions[J].Journal of Applied Physics,1949,20(12):1137-1140.
[11]赵晓鹏,罗春荣,周本濂(Zhao Xiaopeng,Luo Chunrong,Zhou Benlian).ER流体的应用前景展望(Application prospect of ER fluid)[J].材料导报(Materials Review),1993,(6):12-15.
[12]倪光正,杨仕友,邱捷(Ni Guangzheng,Yang Shiyou,Qiu Jie).工程电磁场数值分析(Numerical analysis of engineering electromagnetic field)[M].北京:机械工业出版社(Beijing:China Machine Press),2009.
[13]倪光正(Ni Guangzheng).工程电磁场原理(Principle of engineering electromagnetic field)[M].北京:高等教育出版社(Beijing:Higher Education Press),2009.
[14]Ida N.Engineering Electromagnetics[M].New York:Springer,2000.
[15]马中原,廖承林,王丽芳(Ma Zhongyuan,Liao Chenglin,Wang Lifang).金属异物对电动汽车无线充电系统影响分析(Analysis of metal foreign object setting on electric vehicle wireless power transfer system)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2017,36(2):14-20.
[16]郭凤仪,刘帅,王智勇(Guo Fengyi,Liu Shuai,Wang Zhiyong).弓网系统滑动电接触瞬态温度场仿真研究(Research on transient temperature field of electrical sliding contact in pantograph and catenary system)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2017,36(3):29-34.
[17]李丹,徐蓉,袁伟群,等(Li Dan,Xu Rong,Yuan Weiqun,et al.).电磁发射装置绝缘支撑结构多场特性研究(Study on multi-physics characteristics of insulators in electromagnetic launcher system)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2016,35(8):36-39.
[18]盛骤,谢式千,潘承毅(Sheng Zhou,Xie Shiqian,Pan Chengyi).概率论与数理统计(Probability theory and mathematical statistics)[M].北京:高等教育出版社(Beijing:Higher Education Press),2009.
[19]Dexter F,Ledolter J.Bayesian prediction bounds and comparisons of operating room times even for procedures with few or no historic data[J].Anesthesiology,2005,103(6):1259-1267.
[20]Zhou J S,Dexter F.Method to assist in the scheduling of add-on surgical cases-Upper prediction bounds for surgical case durations based on the log-normal distribution[J].Anesthesiology,1998,89(5):1228-1232.