Considering bearing foundation vibration,a dynamic mesh algorithm model was proposed in order to solve the problem of oil film performance calculation of controllable journal bearing.The principle of its mesh updating was expounded and the solution method of the axis orbit of the rotor system supported by the controllable journal bearing was given.During the performance calculation process of the sliding bearing-rotor-foundation system,this method ensures that the radial grid line of oil film is perpendicular to the journal surface,and can reduce the cumulative calculation error of oil film performance.The correctness of the model was verified by comparing the calculation results of rotor axis static equilibrium position under unbalanced load with the oil film force database method and classical computational data.Using this method,the power frequency vibration of sliding bearing-rigid rotor system excited by sinusoidal displacement signal was analyzed.The calculation results show that the sinusoidal displacement of the appropriate phase and amplitude can reduce the unbalance vibration of the rotor.This provides a new method to calculate the performance of the rotor system supported by such active controllable journal bearings as giant magnetostrictive material bearing,piezoelectric ceramic material bearing and flexure-hinge material bearing.