Design and performance study of a multi-pole excited magnetorheological damper with inner-outer cylinders
CAI Shenglong
HU Guoliang
YU Lifan
ZHANG Jiawei
ZHU Wencai
Abstract：[Objective]Aiming at the insufficient effective flow channel length of magnetorheological dampers caused by structural and dimensional constraints,an inner-outer cylinder magnetorheological damper with multi-pole excitation was designed.[Methods]Firstly,a multi-pole configuration was adopted,and eight parallel axial flow channels were machined on the inner cylinder to guide magnetic field lines to perpendicularly traverse the entire flow channel,thereby effectively lengthening the effective flow path of the damper.Secondly,a simplified magnetic circuit model was established based on Ohm's law for magnetic circuits,and the mathematical expression for output damping force was derived.Numerical simulations were carried out using COMSOL software to analyze the internal magnetic flux density and pressure distribution inside the damper.Finally,the variations of damping force with piston head displacement and velocity under sinusoidal excitation were investigated.[Results]The simulation results reveal that the output damping force of the damper ranges from 0.24 kN to 3.36 kN under the excitation current of 0-2.0 A,with a damping force adjustable ratio of 1 to 14.4.
Keywords：Magnetorheological damperMulti-poleMagnetic flux densityDamping performance
Publication Date：2026-07-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 51-57 )