For the optimization design of the structure and mechanical properties of the high-speed areo-engine rotor system

the influence of bearing-support properties (supporting point and supporting stiffness) on the rotor stiffness and dynamics was studied

and the correlation model for the bearing-support structure and rotor dynamics properties was established. The correlation between bearing-support parameters and mechanical properties

including the rotor stiffness

vibration

was analyzed. The influences of bearing-support properties and inertia load of rotating disc on rotor dynamics were quantitatively described

and the optimization design method and flow of bearing-support structure and rotor dynamics were presented. The numerical simulation result shows that the bearing-support structure properties method could determine the supporting point and supporting stiffness

and improve the stuffiness and vibration properties. This method is highly feasible

and beneficial to improve the design efficiency

and has important reference value for design of areo-engine overall structural layout and structural dynamics.