DISC FLEXIBILITY EFFECTS IN ROTOR-BEARING SYSTEMS

The importance of the inclusion of disk flexibility on the natural fre quencies' in a rotor dynamic analysis has attracted the attention of m any researchers in the recent past.: Such an analysis helps to predict the dynamic response of rotors more accurately from the natural frequ encies and mode shapes calculated hence. In the present analysis a sem i-analytical conical shell finite element is used for the modelling of the rotor with the inclusion of the support bearing flexibility. Such an element could include the flexibility of the disks, shaft and the bearings. A parametric study was also performed for looking into the f requency characteristics of the system. The study brings out the addit ional disk modes a well as the behaviour of the system at higher circu mferential modes. Copyright (C) 1996 Elsevier Science Ltd.