Study on Rub-impact Faults in Two Discs of Double Span Rotor System

Abstract

A new model of improved friction is proposed considering the bearing oil film force and nonlinear rubbing force and based on dual - span rotor system. The nonlinear dynamic equations of the two-span rotor system under the influence of nonlinear oil film force and rubbing force are established. The dynamic characteristics of the double-disk rub-impact fault of the double-span rotor system were analyzed by numerical simulation method. Through the contrast analysis of the linear friction model and the improved model of the impact force, it is found that the dynamic response of the improved model is more complex and more realistic to reflect the rubbing fault.