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制备了两根中间层为磁流变弹性体材料、上下表面层是铝合金的磁流变弹性体夹层梁,其中中间层磁流变弹性体材料中的铁磁颗粒、硅油和硅胶质量分数为7∶1∶2和7∶1.5∶1.5。搭建了振动实验台研究分析非均匀磁场作用下磁流变弹性体悬臂夹层梁的振动响应,其中外加磁场场强大小的变化通过改变永久磁铁间的垂直距离获得。实验结果表明:无论是沿着夹层梁水平方向从固定端向自由端移动,还是在特定位置改变外加磁场强度大小,夹层梁的一阶振动频率都有逐步减小的趋势;含有更高硅油比的弹性体夹层梁有着更好的减振效果。
The preparation of two magnetorheological elastomer material for the middle layer, the upper and lower surface layer is a magnetorheological elastomer sandwich beam, wherein the middle layer of magnetorheological elastomer material, ferromagnetic particles, silicone oil and silica gel mass fraction of 7: 1: 2 and 7: 1.5: 1.5. A vibration experiment bench was set up to study and analyze the vibration response of the MRF cantilever beam with non-uniform magnetic field. The variation of the field strength of the applied magnetic field was obtained by changing the vertical distance between the permanent magnets. The experimental results show that the first-order vibration frequency of the mezzanine beam decreases gradually both in the horizontal direction of the mezzanine beam and in the specific position, and the first-order vibration frequency of the mezzanine beam decreases gradually. The elastomer sandwich beam has a better damping effect.