Design, theoretical modeling, and experimental analysis of a magnetorheological damper with radial damping gap

Abstract

In order to describe and predict the damping force of the magnetorheological damper with radial damping gap, a more accurate damping force calculation model is proposed through theoretical modeling. Firstly, according to the working environment of the heavy vehicle, a magnetorheological damper with radial damping gap is designed in a limited installation space, which has the characteristics of large damping force and tensile damping force greater than compression damping force. Secondly, based on the Bingham model for theoretical modeling, the analytical solution of the pressure drop gradient of the radial damping gap is obtained, and then a theoretical model that can more effectively reflect the mechanical characteristics of the radial damping gap is proposed. The dynamic characteristics of the designed magnetorheological damper are tested, and the experimental results verify that the designed structure has a good magnetorheological effect. When the current is 3 A, the maximum damping force of the damper exceeds 16 kN. Finally, by comparing the simulation results of the theoretical model with the experimental results, the results show that the established mathematical model can describe the experimental results well. The accuracy of the theoretical model is verified by comparing the proposed model with two commonly used models.