Experimental investigation into dynamic behaviors of a rotor on a magnetic controlling squeeze film damper

In order to make the dynamic behavior of convention squeeze film damper be controllable, a novel magnetic controlling squeeze film damper is presented based on the magnetic field effect. By using a flexible rotor system with two disks at different magnetic flux densities, for a rotor system on a novel magnetic controlling squeeze film damper, the frequency response functions in a stationary state, the rotor motion orbits in the steady state rotational speeds, and the unbalance response curves in the slowly accelerating operation are measured. It is shown that the dynamic behavior of the novel magnetic controlling squeeze film damper is easily controlled by adjusting the magnetic flux density. The novel field magnetic controlling squeeze film damper can significantly suppress the vibration of the rotor system for properly designed case, and is with advantages of both the passive and the active dampers in the rotor system.