中文摘要：

针对轴向流动型磁流变液减振器有效阻尼通道短和磁场利用率不高的问题,提出一种多级径向流动型磁流变液减振器;建立了磁流变液径向流动控制方程,并对其进行了合理简化,采用双粘本构模型导出磁流变液径向流动速度的表达式;利用定积分法分析了磁流变液惯性效应对径向压力梯度影响;得出了基于准稳态与非稳态流动的磁流变液减振器阻尼力计算方法。为了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要求,设计制作了多级径向流动型磁流变液减振器,利用J95-I型油压减振器实验台对其进行了阻尼特性实验,比较了不同激励电流下的磁流变液减振器阻尼力的实验值与理论值。

英文摘要：

Due to the problems of short damping channels and low magnetic field utilization in Magneto-rheological（MR） fluid shock absorber based on axial flow, a MR fluid shock absorber based on multi-stage radial flow mode is put forward and the governing equation of MR fluid radial flow is established and simplified rationally. Then the expression of MR fluid radial ve- locity is derived using the bi-viscous constitutive model. The contribution of pressure gradient with inertia effect is analyzed by integration. The numerical method of damping force is obtained via quasi-static flow and unsteady flow. In order to verify rationality of theory, the MR fluid shock absorber based on multi-stage radial flow is designed and fabricated according to technical requirements of railway vehicle anti-yaw shock absorber. The damping characteristics are tested by J95-I type shock absorber test-bed. Experimental damping forces are compared with theoretical value in different excitation currents.