Stress Analysis of a Rectangular Shaft Carrying a Rotor System Due to Eccentricity

Rotating machinery is used in several mechanical system affected by exogenous or endogenous vibration due to unbalance, misalignment and cracks, which leads to generate extra forces on shaft and bearings. This research is dedicated to study the unbalance and dissimilarity of shaft on both stresses and deflections of rotor supported by a film of oil bearing. Different rotational speeds (1000 - 4400) rpm and unbalance effects (0.0001-0.0003) m, have been considered. A dynamic model system of the shaft has a rectangular cross – section of (30 x 15) mm 2 and with a mass of 6 kg. The parameters of rotor-shaft, which represented by the value of stiffness coefficients and journal bearing represented by both stiffness and damped coefficients were simulated using MATLAB/ Simulink software, so that, the reaction forces are calculated. Finite Element Program (ANSYS) has been used to analysis of the stresses for the shaft and bearings produced eccentricity and rotation.