阻尼力双向调节磁流变阻尼器的结构设计与性能预估
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摘要
为克服传统磁流变阻尼器在零电流状态下出力过小以及逆变式磁流变阻尼器无法充分退磁等缺陷,设计了一种阻尼力双向调节的新型磁流变阻尼器。提出了新型复合磁路结构,通过磁场有限元分析完成了该阻尼器的结构设计和磁路设计,并根据Bingham平板模型预估了该阻尼器在零、最大和最小输入电流三个状态下的出力,得到了三个状态下该阻尼器的力-速度曲线。研究表明:所提出的新型复合磁路结构可实现磁流变阻尼器阻尼力的双向调节,且三个状态下阻尼器的出力分布合理,满足设计要求;零电流状态下阻尼器的出力介于其最大出力与最小出力之间,既能保证阻尼器的故障安全(fail-safe)性能,又能避免活塞出现抱死现象;且由于零电流状态下阻尼器阻尼通道内保持一定的磁通量,可防止磁流变液的沉降。
A new MR damper with bidirectional adjusting damping force is designed to overcome the disadvantages of the traditional magnetorheological(MR) damper,whose damping force is too low in the state of zero current,and the inverted MR damper that is unable to be fully demagnetized.A new structure of composite magnetic circuit is proposed,and the structural and magnetic circuit design of the damper is accomplished through the finite element analysis on the magnetic field.The outputs of the damper in three states of zero,maximum and minimum input currents are predicted according to the Bingham plate model,and the force-velocity curves of the damper in the three states are obtained.It is shown that the proposed composite magnetic circuit may achieve the bidirectional adjustment of damping force,and the distribution of the outputs of the damper in the three states is reasonable and meets the design requirement.The output of the damper in the state of zero current is between the maximum and minimum outputs,which not only ensures the fail-safe property of the damper,but also avoids the locking phenomenon of piston.The settling of the MR fluid may be prevented because a definite magnetic flux is maintained in the damping tunnel of the damper in the state of zero current.
A new MR damper with bidirectional adjusting damping force is designed to overcome the disadvantages of the traditional magnetorheological(MR) damper,whose damping force is too low in the state of zero current,and the inverted MR damper that is unable to be fully demagnetized.A new structure of composite magnetic circuit is proposed,and the structural and magnetic circuit design of the damper is accomplished through the finite element analysis on the magnetic field.The outputs of the damper in three states of zero,maximum and minimum input currents are predicted according to the Bingham plate model,and the force-velocity curves of the damper in the three states are obtained.It is shown that the proposed composite magnetic circuit may achieve the bidirectional adjustment of damping force,and the distribution of the outputs of the damper in the three states is reasonable and meets the design requirement.The output of the damper in the state of zero current is between the maximum and minimum outputs,which not only ensures the fail-safe property of the damper,but also avoids the locking phenomenon of piston.The settling of the MR fluid may be prevented because a definite magnetic flux is maintained in the damping tunnel of the damper in the state of zero current.
引文
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[8]Li Z X,Xu L H.Performance tests and hysteresis model of MRF-04K damper[J].Journal of Structural Engineering,ASCE,2005,131(8):1303-1306.
[9]杜修力,牛东旭,廖维张.逆变型磁流变阻尼器的设计及性能试验[J].振动与冲击,2006,25(5):49-53.Du Xiuli,Niu Dongxu,Liao Weizhang.Design and experimental studies on the inverse control magneto rheological damper[J].Journal of Vibration and Shock,2006,25(5):49-53.(in Chinese)
[10]闫维明,纪金豹,葛惠娟.逆变型MR阻尼器磁路设计与试验研究[J].北京工业大学学报,2006,32(7):592-595.Yan Weiming,Ji Jinbao,Ge Huijuan.Magnetic circuit design and experimental study on the inverse MR dampers[J].Journal of Beijing University of Technology,2006,32(7):592-595.(in Chinese)
[11]闫维明,葛惠娟,董彬.逆变型磁流变阻尼器的实验和分析[J].地震工程与工程振动,2007,27(3):171-176.Yan Weiming,Ge Huijuan,Dong Bin.Test of reverse effect MR damper[J].Earthquake Engineering and Engineering Vibration,2007,27(3):171176.(in Chinese)
[12]张微敬,田石柱,欧进萍.模型结构的磁流变阻尼减振控制试验研究[J].工程力学,2006,23(10):125-131.Zhang Weijing,Tian Shizhu,Ou Jinping.Experimental study of model structure with magnetorheological damper[J].Engineering Mechanics,2006,23(10):125-131.(in Chinese)
[13]张红辉,廖昌荣,陈伟民.磁流变阻尼器磁路设计及磁饱和有限元分析[J].功能材料与器件学报,2004,10(4):493-497.Zhang Honghui,Liao Changrong,Chen Weimin.Magnetic design of MR damper and FEM analysis on saturation[J].Journal of Functional Materials and Devices,2004,10(4):493-497.(in Chinese)
[2]Yang G,Spencer B F,Carlson J D.Large-scale MR fluid dampers:modeling,and dynamic performance considerations[J].Engineering Structures,2002,24(3):309-323.
[3]Yang G.Large-scale magnetorheological fluid damper for vibration mitigation:modeling,testing and control[D].Indiana:University of Notre Dame,2001.
[4]Dyke S J,Spencer B F,Sain M K.An experimental study of magnetorheological dampers for seismic protection[J].Smart Materials and Structures,1998,7:693-703.
[5]欧进萍,关新春.磁流变耗能器及其性能[J].地震工程与工程振动,1998,18(3):74-81.Ou Jinping,Guan Xinchun.Magnetorheological fluid dampers and their properties[J].Earthquake Engineering and Engineering Vibration,1998,18(3):74-81.(in Chinese)
[6]瞿伟廉,樊友川.磁流变液阻尼器的磁路有限元分析与优化设计方法[J].华中科技大学学报(城市科学版),2006,23(3):1-4.Qu Weilian,Fan Youchuan.Magnetic circuit finite element analysis and optimum design method of a MR damper[J].Journal of Huazhong University of Science and Technology(Urban Science Edition),2006,23(3):1-4.(in Chinese)
[7]李忠献,吴林林,徐龙河.磁流变阻尼器的构造设计及其阻尼力性能的试验研究[J].地震工程与工程振动,2003,23(1):128-132.Li Zhongxian,Wu Linlin,Xu Longhe.Structural design of MR damper and experimental study for performance of damping force[J].Earthquake Engineering and Engineering of Vibration,2003,23(1):128-132.(in Chinese)
[8]Li Z X,Xu L H.Performance tests and hysteresis model of MRF-04K damper[J].Journal of Structural Engineering,ASCE,2005,131(8):1303-1306.
[9]杜修力,牛东旭,廖维张.逆变型磁流变阻尼器的设计及性能试验[J].振动与冲击,2006,25(5):49-53.Du Xiuli,Niu Dongxu,Liao Weizhang.Design and experimental studies on the inverse control magneto rheological damper[J].Journal of Vibration and Shock,2006,25(5):49-53.(in Chinese)
[10]闫维明,纪金豹,葛惠娟.逆变型MR阻尼器磁路设计与试验研究[J].北京工业大学学报,2006,32(7):592-595.Yan Weiming,Ji Jinbao,Ge Huijuan.Magnetic circuit design and experimental study on the inverse MR dampers[J].Journal of Beijing University of Technology,2006,32(7):592-595.(in Chinese)
[11]闫维明,葛惠娟,董彬.逆变型磁流变阻尼器的实验和分析[J].地震工程与工程振动,2007,27(3):171-176.Yan Weiming,Ge Huijuan,Dong Bin.Test of reverse effect MR damper[J].Earthquake Engineering and Engineering Vibration,2007,27(3):171176.(in Chinese)
[12]张微敬,田石柱,欧进萍.模型结构的磁流变阻尼减振控制试验研究[J].工程力学,2006,23(10):125-131.Zhang Weijing,Tian Shizhu,Ou Jinping.Experimental study of model structure with magnetorheological damper[J].Engineering Mechanics,2006,23(10):125-131.(in Chinese)
[13]张红辉,廖昌荣,陈伟民.磁流变阻尼器磁路设计及磁饱和有限元分析[J].功能材料与器件学报,2004,10(4):493-497.Zhang Honghui,Liao Changrong,Chen Weimin.Magnetic design of MR damper and FEM analysis on saturation[J].Journal of Functional Materials and Devices,2004,10(4):493-497.(in Chinese)
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