汽车磁流变减振器流变力学特性的研究

磁流变液是一种新型的功能材料 ,属于可控流体 它能在强磁场作用下从牛顿流体变为有较高屈服应力的粘塑流体 ,这种变化连续可逆且迅速 ,用其制成的阻尼器具有结构简单、体积小、能耗低和阻尼可连续调节等优点 利用非牛顿粘性流体模型和宾汉流体模型 ,设计基于流动模式的汽车用磁流变减振器 ,利用ANSYS有限元分析软件计算其力学性能并进行试验验证 结果表明磁流变减振器可实现阻尼无级可调 ,将其用于汽车悬架系统 ,可改善行驶的平顺性 ,获得良好的振动特性

Study on Rheological Properties of Vehicle MRF Shock Absorber

Magnetorheological fluid (MRF) is a kind of novel material. It belongs to a controllable fluid and can be changed from Newtonian fluid to viscoelastic fluid by applying magnetic field. This change is successive, reversible and rapid. The auto damper made of MRF has the features of simple, small size, low consumption power, and adjustable successively. Rheological properties of MRF shock absorber have been proposed using non Newtonian fluid model and Bingham plastic model. Automotive MRF shock absorber based on flow mode has been designed, some mechanical properties have been analyzed by ANSYS and compared with testing results. The results show that vehicle MRF shock absorber allows damping force adjustable continuously, improves riding harshness, and is very effective in isolating the vibration of vehicle suspensions.