Development and damping properties of a seismic linear motion damper with MR fluid porous composite rotary brake
Development and damping properties of a seismic linear motion damper with MR fluid porous composite rotary brake
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DOI：
10.1088/1361-665x/abb645
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发表时间：
2020-10
影响因子：
4.1
通讯作者：
M. Nakano;Jian Yang;Shuaishuai Sun;A. Totsuka;Akira Fukukita
中科院分区：
文献类型：
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作者：
M. Nakano;Jian Yang;Shuaishuai Sun;A. Totsuka;Akira Fukukita
磁流变液中分散颗粒在非工作状态下的沉降问题一直是一个具有挑战性的问题，严重影响了其实际应用。为了解决这一问题，本工作制备了由多孔材料浸渍磁流变液制成的“磁流变液多孔复合材料”。通过对比实验证明了其防止颗粒沉降的效果。用自制的振荡流变仪对其磁流变效应进行了测量和验证。利用磁流变流体多孔复合材料，研制了一种小型地震线性磁流变阻尼器。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），几乎没有传输损耗。对所研制的小型地震磁流变阻尼器的阻尼性能进行了实验研究，结果表明，在施加0.5A电流时，阻尼力达到20kN的设计目标。在此基础上，建立了阻尼力的理论模型。仿真结果表明，该模型能够较好地描述线性磁流变阻尼器的抗震性能。
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 force to be 20 kN has been achieved when applying an electric current of 0.5 A. Then a theoretical model was derived to estimate the damping force. The simulation results demonstrate that the proposed model is good at describing the properties of the seismic linear MR damper.