无补偿式单出杆磁流变阻尼器的力学性能研究及其建模
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摘要
针对自主研制的适用于爆炸冲击震动环境下的无补偿式单出杆磁流变阻尼器,研究其不同工作状态对力学性能的影响,并通过对双曲正切滞回模型增加表达惯性力项进行修正建立力学模型。结果表明,这种磁流变阻尼器不存在偏置力,其耗能能力与最大阻尼力均随着电流、活塞速度的增加而增大,但它们之间为非线性关系。利用最小二乘法与单纯形法相结合的方法对力学模型进行两步辨识,使得搜索空间的维数由5下降为2,提高了参数辨识的效率。对比力学性能试验数据与经参数辨识后的力学模型证实,所提出的力学模型能够很好地模拟无补偿式单出杆磁流变阻尼器的力学性能。
The dynamic performance of single pole magnetorheological damper(MRD) without accumulator in different working status was researched,which was developed by us to apply in the environment of explosion and shock.The mechanical model of this type MRD was proposed by adding the item of inertia force based on the hyperbolic tangent model.By the analysis of indicator characteristics of MRD,it is concluded that there is no offset force in the single pole magnetorheological damper(MRD) without accumulator.The dissipation energy and the maximal damping force increase nonlinearly with the excited electric current and piston's velocity.The parameters of its mechanical model are identified by least square method combining with simplex method,which make the five dimensions of search space reduce to two.By comparing the results of test with simulation,it is proved that the mechanical model proposed in this paper can simulate the indicator characteristics of single pole MRD without accumulator accurately.
The dynamic performance of single pole magnetorheological damper(MRD) without accumulator in different working status was researched,which was developed by us to apply in the environment of explosion and shock.The mechanical model of this type MRD was proposed by adding the item of inertia force based on the hyperbolic tangent model.By the analysis of indicator characteristics of MRD,it is concluded that there is no offset force in the single pole magnetorheological damper(MRD) without accumulator.The dissipation energy and the maximal damping force increase nonlinearly with the excited electric current and piston's velocity.The parameters of its mechanical model are identified by least square method combining with simplex method,which make the five dimensions of search space reduce to two.By comparing the results of test with simulation,it is proved that the mechanical model proposed in this paper can simulate the indicator characteristics of single pole MRD without accumulator accurately.
引文
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[2]Choi Kangmin,Cho Sangwon,Jung Hyungjo,et al.Semi active fuzzy control for seismic response reduction using magnetorheo logical dampers[J].Earthquake Engineering and Structural Dynamics,2004,33(6):723-736.
[3]Qu W L,Xu Y L.Semi active control of seismic response of tall buildings with podium structure using ER/MR dampers[J].The Structural Design of Tall Buildings,2001,10(3):179-192.
[4]Duan Y F,Ni Y Q,Ko J M.State derivative feedback control of cable vibration using semi active magnetorheological dampers[J].Computer Aided Civil and Infrastructure Engineering,2005,20(6):431-449.
[5]张红辉,廖昌荣,刘永贵,等.磁流变阻尼技术及其在军用装备系统中的应用[J].兵器材料科学与工程,2006,29(4):65-69.
[6]兰文奎.磁流变减振器设计及试验研究[D].重庆:重庆大学,2007.
[7]周强,瞿伟廉.磁流变阻尼器的两种力学模型和试验验证[J].地震工程与工程振动,2002,22(4):144-150.
[8]翁建生.基于磁流变阻尼器的车辆悬架系统半主动控制[D].南京:南京航空航天大学,2001.
[9]李延成.冲击荷载下磁流变缓冲器半主动控制研究[D].南京:南京理工大学,2007.
[10]金江,刘红梅,王海霞.磁流变阻尼器的实用计算模型[J].南通大学学报,2006,5(3):80-83.
[11]陈宝林.最优化理论与算法[M].2版.北京:清华大学出版社,2000:12-20.
[12]张智星.Matlab程序设计与应用[M].北京:清华大学出版社,2002:322-326.
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