Sensitivity Analysis Of The Parameters Of An Analytical Rotor Vibration Model

In order to reach higher power density ratio increasing the speed of electrical machines can be considered. Thus, for all rotating machine and more specifically for high speed machine the mechanical handling of the rotor needs to be insured to provide safety working conditions. Developing a four degrees of freedom analytical model considering gyroscopic effects will allow to identify rapidly the critical speeds, in comparison to fully-resolved FE simulations. By varying the different parameters of the model (geometry, properties of the bearings, speed of the rotor) a sensitivity analysis can be done. FE simulations are also done to validate the analytical model.