Engine rotor dynamics design method

The invention discloses an engine rotor dynamics design method, which is characterized in that the engine rotor dynamics design method comprises the steps of determining squirrel cage structure parameters and oil film structure parameters, calculating elastic support stiffness according to squirrel cage stiffness and oil film stiffness, calculating engine modality according to the elastic support stiffness, and calculating engine modality according to the engine modality. And evaluating modal danger according to the modal of the engine, and evaluating the dynamic parameters of the rotor according to the modal danger rating. According to the dynamic design method for the engine rotor, modal resonance harmfulness rating is conducted on the high-rotating-speed and long-span supercritical engine rotor, the critical rotating speed of the engine rotor is designed based on the resonance modal harmfulness rating, and a mouse cage and an extrusion oil film damper are adopted to achieve vibration reduction and elastic