磁流变纤维骨架阻尼增强型阻尼器研究

Research on Magnetorheological Fiber Skeleton Damping Enhanced Damper

为了增强磁流变脂的剪切性能,提高阻尼器的阻尼力输出,研究棉纤维对磁流变脂剪切增强效果。制备了不同棉纤维质量分数的磁流变脂试样,在流变仪上对其进行测试。结果表明,复合纤维磁流变脂的最大剪切应力随着纤维质量分数的增加而增加。基于复合材料设计制造了一款剪切式磁流变阻尼器,该阻尼器具有磁流变材料用量少、密封要求低等优点。磁流变阻尼器的阻尼特性实验表明,在1.6 A电流下,棉纤维质量分数为1.5%的磁流变脂的最大阻尼力可达99.5 N,与无棉纤维添加的磁流变脂相比,提升了23.8%,这表明使用复合纤维磁流变脂的阻尼器具有更好地阻尼力输出。

To enhance the shear properties of magnetorheological grease and improve damping force output of damping devices,the effect of cotton fibers on the shear enhancement of magnetorheological grease is investigated.Magnetorheological grease with different fiber cotton mass fractions is prepared and tested on a rheometer.The experimental results show that the maximum shear stress of composite fiber magnetorheological grease increases with increasing fiber mass fraction.A shear magnetorheological damper is designed and manufactured based on composite material,the damper has the advantages of low amounts of magnetorheological materials and low sealing requirements.The damping characteristics of the magnetorheological damper experiment showed that under a current of 1.6 A,the maximum damping force of the magnetorheological grease with a cotton fiber mass fraction of 1.5%can reach 99.5 N,which is 23.8%higher than that of the magnetorheological grease without cotton fiber addition.This indicates that the damper using composite fiber magnetorheological grease has better damping force output.