抄録
Many rotors are supported by an oil film bearing which has high stiffness. Since the gap of an oil film bearing is very small, we must suppress vibration as much as possible to prevent metal contact by an oil membrane break. Therefore the damping ratio is an important index to use when evaluating the rotor system stability. However it is difficult to identify the damping ratio under various conditions. In this paper, the damping ratio of oil film bearing rotor system is evaluated by using the tracking solver. This solver provides a continuous solution of damping ratio during rotation. We calculate the damping ratio of the oil film bearing with a dynamic vibration absorber which is developed for suppression of oil whip instability.
