Effect of manufacturing tolerances on rotor-bearing systems stability via interval analysis

The stability problem of a flexible rotor supported by two hydrodynamic journal bearings is considered. Oil film properties and shaft flexural rigidity are assumed to be only known with certain closed intervals due to manufacturing tolerances. The system, therefore, incorporates several independent interval parameters, which could lead to substantial changes in the stability conditions. An interval analysis technique is applied to evaluate the stability of the system.