An analytical approach to the dynamic analysis of a rotating electric machine

This study presents an analytical approach to the dynamic problem encountered by a rotating electric machine supported by nonlinear bearings with damping properties subjected to a forcing excitation caused by an unbalanced force and a parametric excitation caused by an axial thrust. The method employed in this analytical study is the Optimal Variational Iteration Method (OVIM), which proves to be very effective and accurate in solving nonlinear problems. The results are presented in the form of a time displacement response. The results obtained from numerical simulations are in very good agreement with the approximate analytical results obtained through the proposed method.