A COMPUTATIONAL STUDY OF THE INFLUENCE OF SHORT MAGNETORHEOLOGICAL DAMPERS ON THE STEADY STATE LATERAL VIBRATION OF A FLEXIBLY SUPPORTED RIGID ROTOR

摘要

Lateral vibration of flexibly supported rigid rotors can be significantly reduced if damping elements are inserted between the shaft and the stationary part. To achieve their optimum performance, the damping effect must be controllable. This is enabled by magnetorheological squeeze film dampers whose damping depends on magnetic induction in the lubricating layer. In the mathematical model they are represented by force couplings. The pressure distribution in the oil film is described by a Reynolds equation modified for the case of Bingham fluid. The developed procedure is intended for determining the steady state response of unbalanced rotors and forces transmitted through the coupling elements into the stationary part.