剪切阀式磁流变减振器力学特性实验研究

An Experimental Study on the Dynamic Characteristic for MRF Damper of Shearing-Valve Mode

本文对剪切阀式磁流变减振器的结构和工作原理作了介绍,基于平板模型对其结构进行简化,采用叠加法得出了其阻尼力的理论计算模型。利用材料试验机(MTS)分别在不同电流、振幅、速度和频率等条件下,对自行研制的剪切阀式磁流变减振器的动态特性进行了实验研究,得出了相应的实验曲线。实验结果表明剪切阀式磁流变减振器具有优良的电控阻尼力特性,且振幅、速度和频率等因素对其阻尼力有着重要影响,另外也对其阻尼力的理论计算公式作了验证。

The construction and principle about Magneto-rheological fluids damper of shearing-valve mode were introduced firstly. Then the MR damper was predigested as a flat-panel model, and theoretic damping force calculation formula of Magneto-rheological fluids damper was concluded in detail. To study its dynamic damping force characteristics, applying the Material Test System (MTS), in different electric currents, displacements, velocities and frequencies, experiments were performed to the Magneto-rheological fluids damper made by ourselves. A set of experimental curves about damping force VS. current, displacement and velocity were obtained. Furthermore, the theoretic calculation formula was also validated. From the experimental curves, it can be concluded that the Magneto-rheological fluids damper has an excellent electricity-controlling damping force characteristic, and its damping force is affected obviously by values of displacement, velocity and frequency, etc. The remarks are very useful for applications of the damper in different engineering fields.