Magnetic Circuit Simulation and Analysis of Shear-Valve Mode MRF Damper

Abstract

The magnetic circuit structure in the damper is important for the design of the magnetorheological damper (MRD). This paper aims to explore the influence of various structural parameters in the magnetic circuit structure on shear-valve magnetorheological dampers. In order to establish the magnetic circuit structure model with different structural parameters and simulate the model with the finite element method, PAO-6, a polyolefin synthetic oil, was selected as the carrier liquid and the Carbonyl Iron Power whose average particle size is about 2 $\mu$m was selected as the magnetic particles. Besides, some parameters of the magnetic circuit structure are set, including damping channel gap, cylinder wall thickness, coil slot length and depth as well as core thickness. Simulation results of different structural parameters are analyzed for comparing the variation of magnetic induction strength. The effects of different structural parameters on the performance of the MRD will be considered during the design, and the influence of the various structural parameters on the energy distribution of the magnetic field will be balanced to maximize the mechanical performance of the dampers.