Analysis on the vibration modes of the rotor system of the turbocharger

In order to investigate the characteristic of vibration of the rotor system of turbo-charger, the modal test technology and the finite element method are employed. Firstly, the modal parameters are obtained by using the modal test, and then the modal parameters are calculated by using finite element method and the software ANSYS8.0, which considering the oil film stiffness of the floating-ring bearings and the rotor's rotating speed at the same time. The influences of the oil film stiffness of the floating-ring bearings and rotating speed of the rotor are totally considered in the conclusion, which provide the theoretical basis for turbocharger's vibration control and structure improvement.