MRF和MRE磁流变夹层梁振动控制性能测试分析

Analysis of Vibration Control Performance of Magnetorheological Sandwich Beam Based on MRF and MRE Materials

分别设计了中间层结构为磁流变液(MRF)和磁流变弹性体(MRE)的两种磁流变夹层梁结构;搭建振动响应性能测试台,在外加局部磁场和不同磁场区域的条件下对MRF夹层梁和MRE夹层梁的固有频率和动态响应特性进行了测试及对比分析。实验结果表明,随着外加局部磁场强度的增大,MRF和MRE夹层梁的固有频率均呈下降趋势;随着磁场区域从夹层梁的固定端移动到自由端的过程中,MRF和MRE夹层梁的固有频率同样呈趋势下降;且MRE夹层梁的固有频率下降幅度比MRF夹层梁的要大。

Two kinds of magnetorheological sandwich beam structures which were fabricated by magnetorheological fluid（ MRF）and magnetorheological elastomer（ MRE） materials were respectively designed. The test rig was set up to investigate the natural frequency and dynamic response characteristics of MRF sandwich beam and MRE sandwich beam under different magnetic field intensity and different external applied magnetic regions. The experimental results show that the natural frequencies of MRF and MRE sandwich beams decrease with the increasing of the external magnetic field intensity; when the magnets move from the fixed end to the free end,the natural frequencies of the MRF and MRE sandwich beam decrease,and the decline rate of MRE sandwich beam is larger than that of MRF sandwich beam.