磁流变阻尼器的构造设计及其阻尼力性能的试验研究

Structural design of MR damper and experimental study for performance of damping force

本文根据磁流变液的材料特点和磁路设计原则,设计并制作了一个双出杆的剪切阀式磁流变阻尼器,在伺服试验机上对所设计制作的磁流变阻尼器的阻尼力性能进行了试验研究,并分析了影响阻尼力的各种因素。结果表明:所设计制作的磁流变阻尼器具有一定的剩磁,但剩磁对阻尼力可调系数的影响很小;所设计制作的磁流变阻尼器能够达到的最大阻尼力和阻尼力可调系数都很理想。由此得出结论,本文所设计制作的磁流变阻尼器具有卓越的阻尼性能,可在土木工程结构的半主动振动控制设计中加以推广和应用。

In this paper, based on the feature of MR fluid and design principle of magnetic circuit, a shear and valve type MR damper with twoway pushover bar and 2stage coils is designed and manufactured. The experimental study on the performance of damping force is performed on the servo test machine, and the factors to affect the damping force is investigated. The results indicate that the remnant magnetism exists in the MR damper, but the influence of the remnant magnetism on the adjustable factor of damping force is very small, and the ideal maximum damping force of the MR damper and its adjustable factor can be obtained. Finally, a conclusion is drawn that the MR damper designed and manufactured by the authors possesses the significant performance of damping force, and can be extended to the actual application for the semiactive vibration control of civil engineering structures.