Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults

Table 2

Simulation parameters of the rotor system.

Parameters	Values
Material	45#steel
Elastic modulus of shaft Ef (Pa)	2.1 × 10^11
Density (kg/m^3)	7850
Poisson ratio	0.3
Normal rub-impact stiffness ratio	2/4/6 × 10^4
Friction coefficient	0.1/0.2/0.3
Bearing stiffness (N/m)	2 × 10^6
Imbalance (kg·m)	167.4/236.7 × 10^−6
Rotational speed (rpm)	1200