双筒单出杆式磁流变阻尼器力学特性研究

介绍了一种基于流动模式的双筒单出杆式磁流变阻尼器结构和工作原理,推导了其阻尼力公式。对基于上述结构的MRF阻尼器的阻尼力、电流、位移、速度和频率等力学特性进行了试验研究。结果表明流动模式磁流变阻尼器的阻尼力随控制电流的增大呈非线性增加,其耗能减振能力优于传统的被动阻尼器。气囊导致压缩行程终点阻尼力放大,并可以在一定程度上消除复原行程的空程现象。而阻尼器的结构尺寸和所选用的磁流变液一旦确定,其可调倍数只依赖于最优的磁路设计。通过深入分析该型阻尼器的动力特性,为改进研制装甲车辆磁流变减振器奠定了基础。

Experimental and Theory Analysis on the Dynamic Characteristic of Flow-mode MRF Single-end Twin-tube Damper

The construction and principle of flow-mode magnetorheological fluids （MRF） damper are introduced in this paper,and damping force calculation formula of MRF damper is concluded. The dynamical characteristic of MRF damper is analyzed in detail by experiment on its dynamic parameters such as damping force, displacement, velocity, frequency and electric current etc. The results show that damping force of flow-mode MRF damper increase non-linearly as control electric current increasing. The absorb vibration capacity of MRF damper is better than that of the traditional damper. Being air chamber, it result in increasing compression force of MRF damper at the compression stroke end point and eliminate not-existing force at the rebound stroke. Once MRF damper dimension and MRF were certain the coefficient k would be dependent on the optimal magnetic circuit design. All this laid a foundation for its implication in the semi-active vibration control of tracked vehicle suspension system.