Experimental study and mechanical model of high vertical bearing capacity MRE bearings

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (20) : 75-84.

L Yang1，ZHANG Fanxing1，ZHANG Yike2

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Abstract

The vertical load-bearing capacity of Magneto-Rheological Elastomer (MRE) isolation bearings is low. However, vertical load has significantly influences on the mechanical performance of the MRE bearings, which limits the engineering applications of MRE bearings. By adding vertical rods to bear vertical loads and a constant magnetic field with permanent magnets, an isolation bearing with a structure of MRE sheets and steel plates alternately stacked and bi-directional adjustable shear stiffness was designed and built. The finite element method was used to analyze the effects of MRE layer thickness, permanent magnet thickness, and magnet placement on the bearing's magnetic circuit. The bearing has a core diameter of 60 mm, consisting of 26 layers of MRE and 25 layers of steel plates. Mechanical performance tests of the bearing were conducted under sinusoidal waves of different frequencies and amplitudes under different currents and weights. Based on the test results, the Particle Swarm Optimization algorithm was used to identify the parameters of the Bouc-Wen model of the bearing. The results show that the MRE bearing has a high vertical load bearing capacity and stable mechanical performance. The Bouc-Wen model can accurately describe the hysteresis characteristics of the bearing, and the fitting data is in good agreement with the experimental results.

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MRE / Isolation bearing / Magnetic circuit optimization / Bouc-Wen model

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L Yang1, ZHANG Fanxing1, ZHANG Yike2. Experimental study and mechanical model of high vertical bearing capacity MRE bearings[J]. Journal of Vibration and Shock, 2024, 43(20): 75-84

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