Dynamic Modeling and Simulation of ball bearing faults in aero-engine dual rotor-bearing-stator coupling system

摘要

In order to conduct the thorough research to the aero-engine, aiming at dual rotor-bearing system of practical aero-engine, a new dual rotor-ball bearing-stator coupling system dynamic model is established. stator motion, the flexible support, squeeze film damper (SDF) were considered in the model, meanwhile the nonlinear factors of ball bearing such as clearance of bearing, nonlinear Hertzian contract force between balls and races, and the varying compliance vibration because of periodical variety of the support stiffness were fully considered. On this basis, established the rolling bearing inner ring damage dynamics model in the coupling system and he Runge-Kutta method was used to simulate and analyze the system, the simulation results verify the dynamic character of the coupling dynamic model with localized bearing faults and show the model is correct and effective.