Abstract
Eccentricity problem is considered as one of the most important and common
repeated problems in rotary shafts in all machines. This will lead to generation of
vibration and extra loads on bearings. Also a non-uniformity can occur in distribution of
applied load on all the surface of the bearing which being concentrated on one or two
sides of the bearing surface. The purpose of this research is to investigate the effect of
the unbalance on the values of stresses and deflections for a flexible rotor supported by
oil film bearings. Various rotational speeds and unbalance effects has been taken in to
consideration. A dynamical model of the system has been built. The parameters of
journal bearing have been determined using MATLAB/ simulink software. ANSYS
program has been used for the analysis of the stresses produced during rotation.
Keywords: Unbalance, Eccentricity, Simulation, Rotor Shaft.
