Mathematical modelling of a short magnetorheological damper

Abstract

Properties of magnetorheological liquids are changed by application of a magnetic field. This enables to control damping of mechanical vibration of rotating and stationary machines. The damping effect of dampers intended for attenuation of lateral vibration of rotors is produced by squeezing a thin film of a magnetorheological liquid. The presented article deals with development of their mathematical model. This requires to determine a pressure distribution in the lubricating film. The cavitation and dependance of magnetic flux on the variable film thickness around circumference of the damper had to be taken into account.