中文摘要：

根据实验得出磁流变液流变学参数,建立磁流变液剪切应力的误差函数,利用多参数优化理论和数据拟合方法对Eyring本构模型的参数进行辨识;针对传统环形阻尼通道磁流变液减振器磁场利用率不高、能耗较大的问题,结合轨道车辆抗蛇行减振器的技术要求,提出一种基于多级径向流动模式的磁流变液减振器,根据流体力学建立磁流变液准静态径向流动的控制微分方程,利用艾林（Eyring）本构模型推导出径向速度随通道半径的理论分布和径向压力随通道半径理论分布,得出减振器阻尼力的计算方法。为验证理论分析的合理性,按照轨道车辆抗蛇行减振器的技术条件,设计制作了基于多级径向流动模式的磁流变液减振器,并利用J95-I型油压减振器试验台对磁流变液减振器进行示功特性测试,比较理论阻尼力与实验阻尼力的变化规律,分析产生误差的主要原因。实验表明：实验阻尼力与理论阻尼力能够较好吻合。

英文摘要：

The Eyring constitutive model parameters have been identified via optimization of the error function of experimental shear stresses and shear stresses from the Eyring model.Due to facts of low magnetic field utilization and high energy consumption of the traditional Magnetorheological（MR） fluid shock absorber with annular damping channels,a MR fluid shock absorber based on the multi-radial flow mode is put forward in accordance with the technical requirements of the railway vehicle anti-yaw shock absorber.The governing differential equation of MR fluid quasi-static radial flow is established on the basis of hydrodynamics.Both radial velocity profiles and radial pressure distributions are derived using the Eyring constitutive model.The numerical method of shock absorber damping forces is obtained.In order to verify rationality of theory,a kind of MR fluid shock absorber based on the multi-radial flow mode is designed and fabricated according to technical requirements of the railway vehicle anti-yaw shock absorber in Chongqing University in China.The force-displacement characteristic of the MR fluid shock absorber is tested by the J95-I type shock absorber test-bed.Experimental damping force is in agreement with the theoretical value and the main reasons of the errors are analyzed.