Analysis and Optimization of MR Damper Based on Parallel of Positive and Negative Stiffness

doi:10.16182/j.issn1004731x.joss.201810044

Abstract

Abstract: For purpose of reducing broadband vibration of precision machine tool from environment, a MR damper with squeeze mode was designed based on parallel of positive and negative stiffness. First, according to fluid continuity equation and momentum equation, the LPM (Lumped Parameter Model) was set up. Then, using two-way fluid-solid coupled nonlinear FEA (Finite Element Analysis), the flow field distribution was discussed for revealing flow characteristics of damper. Based on the LPM, the dynamic stiffness and displacement transfer rate, as well as the high-low frequency decoupling theory, were studied. Finally, multi-objective genetic algorithm was used to carry out the optimization of damper structure, and the selection strategy of Pareto optimal set was analyzed. This research offers a theoretical guidance for design and application of semi-active damper in the field of precision vibration isolation.

Key words: precision vibration isolation, parallel of positive and negative stiffness, fluid-solid coupled FEA, multi-objective genetic algorithm

CLC Number:

TP391.9

Liu Yanbin, Wang Yawei, Han Jianhai. Analysis and Optimization of MR Damper Based on Parallel of Positive and Negative Stiffness[J]. Journal of System Simulation, 2018, 30(10): 3965-3975.

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