多环形槽结构磁流变阻尼器的实验建模

对自行设计的、多环形槽结构磁流变阻尼器进行了理论分析与实验建模.该阻尼器的主要特点是在阻尼活塞周向表面上开有若干个矩形齿状环形槽,并且通过磁路设计,使流经阻尼通道处的磁流变液流动方向与其作用的磁力线方向垂直,用以增大阻尼力和阻尼力变化范围.然后从磁流变液的流变特性、电磁学的角度出发,利用修正了的非牛顿流体宾汉模型、结合实验数据,建立了该阻尼器的力学模型.利用该模型绘制和分析了外加磁场(通过施加电流实现)和阻尼力之间关系曲线,与实验结果较好吻合,从而证明了模型的正确性,为磁流变液阻尼器设计和性能预测提供了参考.

Experimental modeling of multi-ring grooves structure MR fluid damper

Theoretical analysis and experimental modeling of multi-ring grooves structure MR fluid damper designed by ourselves have been made in this paper. Some ring grooves are made on the surface of the damping piston. The ring grooves are rectangular. Their function is to be used as increasing the range and amount of damping force. And the MR fluid flow way through the annular gap between the damping piston and the cylinder is vertical with the direction of magnetic line of force. The paper sets up a dynamic model coming from MR fluid dynamics and electromagnetics theory. The dynamic characteristic of MR damper is obtained by using the amendatory Bingham model, the design parameter of damper and the experimental data. And the characteristic agrees well with the experimental results. This dynamic model can be used as a reference for the design and performance predict.