Simulation Analysis Based on Explicit Dynamics for Dual Rotor Intermediate Bearing

摘要

In order to study the dynamic characteristics of the defect intermediate bearing under complex conditions, in view of the intermediate bearing working characteristics that the low-pressure rotor shaft neck is supported by the outer ring bearing and the high-pressure rotor shaft neck is supported by the inner ring bearing, the dynamic model of the cylindrical roller bearing is established by using ANSYS/LS-DYNA, and dynamic simulation is carried out. In order to avoid signals attenuation through the outer ring raceway. The lower surface center point and the right center point of the intermediate bearing outer ring surface are regarded as the object of study. Signal features of the outer ring fault intermediate bearing are characterized by extracting the acceleration curve of the points. Simulation results show that fault characteristic frequency of intermediate bearing can be found by acceleration responses with spectrum analysis.