The particle sedimentation of the dispersed particles in magnetorheological (MR) fluids when off-working has been a challenging problem, causing adverse effect to their practical applications. In order to solve this problem, ‘MR fluid porous composite’ made of porous materials impregnated with MR fluid has been fabricated in this work. Its effect to prevent the particle sedimentation has been proved through contrast experiment. Its MR effect has also been measured and verified using a hand-made oscillatory rheometer. Utilizing the MR fluid porous composite, a small-scale seismic linear MR damper has been developed. The unique design of this seismic linear MR damper has enabled it to convert the linear motion (damping force) of the MR damper to the rotations (braking torque) of the MR brake with almost no transmission loss. The damping properties of the developed small-scale seismic MR damper were investigated experimentally to be found that the design target with the damping for...

中文翻译：

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MR流体多孔复合旋转制动器的地震线性运动减振器的研制与阻尼特性。

离线工作时，磁流变（MR）流体中分散颗粒的颗粒沉降一直是一个难题，对它们的实际应用造成不利影响。为了解决该问题，在这项工作中已经制造了由浸渍有MR流体的多孔材料制成的“ MR流体多孔复合材料”。通过对比实验证明了其防止颗粒沉降的作用。还使用手工制作的振荡流变仪测量并验证了其MR效应。利用MR流体多孔复合材料，开发了小型地震线性MR阻尼器。这种抗震线性MR阻尼器的独特设计使其能够将MR阻尼器的线性运动（阻尼力）转换为MR制动器的旋转（制动扭矩），而几乎没有传递损失。