A DYNAMIC ANALYSIS OF A OF A DUAL CLEARANCE SQUEEZE FILM DAMPER OPERATING WITH AIR ENTRAINMENT

摘要

Squeeze film dampers (SFD) are devices utilized to control the shafts of high-speed rotating machinery. A dual squeeze film damper (DSFD) consists of two squeeze film bearings that are separated by a sleeve which is released only within abnormal operating conditions. In this part of our study of DSFD we analyze the case when both the inner and the outer oil films are active and air entrainment is allowed. We present computed and measured unbalance responses of a shaft supported in DSFD.