Fluid circuit model for long-bearing squeeze film damper rotordynamics

Results of a rotordynamic analysis of a long-bearing squeeze film damper us ing a fluid circuit approach are presented. A series of nodes and branches represent the geometry of the Row circuit. The mass and momentum conservati on equations are solved to predict the pressure distribution in the squeeze him, The motion of the bearing is simulated by injection/removal of mass a t the nodes. The modeling methodology is benchmarked against published expe rimental long-bearing squeeze film damper test results. The model provides good agreement with the experimental damping coefficient.