无源自适应磁流变阻尼器磁致伸缩逆效应的建模与实验研究

制作了一种基于磁致伸缩逆效应的无源自适应磁流变阻尼器,通过超磁致伸缩材料的逆效应,将外加机械能的变化转化为阻尼器内部磁能的变化,进而控制阻尼间隙处阻尼力的大小,达到预期抗拉目的.为了研究活塞杆上下振动过程中由超磁致伸缩材料引起的阻尼器内部磁场分布的变化规律,应用磁机械效应方法定律对阻尼器的关键技术——磁致伸缩逆效应建立...

Modeling and experiments study of inverse magnetostrictive effect for a new kind of passive adaptive MR damper

A new kind of passive adaptive MR damper was designed and made based on inverse magnetostrictive effect.It transforms the variation of load force into the variation of magnetic field through the inverse magnetostrictive effect,achieving the desired tensile purpose by controlling the damping force at the gap.Aiming at studying the variation of magnetic field distribution in the damper,the model of the relationship between magnetization and the applied stress was established.The distribution variation of the magnetic field was simulated by Ansoft software.The results showed that the simulation is consistent with the assumption.Static and dynamic loading experiments was done,and the results showed that the model predicts the relationship of magnetic flux density and the applied stress effectively,and has important significance for research of giant magnetostrictive material inverse effect and the damper’s internal magnetic field analysis.