Abstract
The solid model of a turbocharger rotor was simulated for the rotordynamic analysis by use of finite element method.The dynamic equations for the solid model were deduced from the rotatory effects and gyroscopic inertia.The program was developed to determine the bending,torsional and their couplied vibration models.Calculations show that both the spin softening and stress stiffening effects have significant influence on the forward and backward whirl modes,and the torsional vibration frequency doesn’t change with the increase of rotor speed.The couplied bending-torsional vibration may be took place as excited.The accuracy of the solid model and the solution techniques have been demonstrated by comparison with other results.
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