540 反発型磁気軸受で支持された回転軸系の接触振れまわリ振動の非線形解析

概要

論文の詳細を見る
A rotating shaft supported by a repulsive magnetic bearing may contact with a backup bearing during the passage of the critical speed as the damping coefficient of the repulsive magnetic bearing is small. This paper investigates the contact vibration during passage of the critical speed. Particularly, the influence of the axial displacement of the repulsive magnetic bearing on the escape speed from the contact vibration is focused. As a result, it is clarified that the rotating speed of the escapement from the contact vibration decreases as the axial displacement increases. It is explained by investigating the influences of both the changes of linear stiffness and nonlinear coefficient in the increase of the axial displacement. And the influences of the linear stiffness and the nonlinear coefficient become large in the case a support stiffness of the backup bearing is large.
2011-09-05