Optimization design of rotor system with squeeze film damper

Abstract

For the rotor system with squeeze film damper (SFD), an optimization design method based on eccentricity iteration was proposed. In this method, ANSYS is used to calculate the dynamic characteristics of the rotor, and Isight is used to solve the optimization design problem. The position of bearing, the position of disks and the support stiffness of SFD was selected as design variables. The optimization design of a double-disk flexible rotor system with SFD was performed, and a series of comparative experiments were carried out. The experimental results show that: after optimization, the amplitude response of the two disks is only 0.052 mm and 0.08 mm respectively when the rotor system passes through the critical speed, and the reaction response of the two supports is only 35 N and 34.2 N respectively. The experimental results demonstrate the effectiveness of the method. It can be used as a general method to deal with the engineering problems of optimal design of complex rotor system with SFD. The optimal design result of the rotor system is that the stiffness of the elastic support is reduced to the minimum, and the position of the two disks is close to the support on the premise that the critical speed satisfies the constraint.