dynamic characteristic similarity design method for a fan rotor test model

A dynamic characteristic similarity design method for a fan rotor test model comprises the steps that firstly, a finite element model of a low-pressure rotor experimental device is established, and modal characteristics of the finite element model are calculated; Then a fan rotor experimental model is established, and the law of influence of fan rotor left and right fulcrum bearing stiffness, theinner and outer diameters of a low-pressure turbine rotor simplified section rotating shaft and the mass and diameter moment of inertia of a wheel disc on the rotating shaft on the modal characteristic of the model are established; And finally, according to the obtained law, each parameter to enable the dynamic characteristics of the fan rotor in the fan rotor experimental model is adjusted to beconsistent with the dynamic characteristics of the fan rotor in the low-pressure rotor system. When the fan rotor experimental device is designed, the coupling effect of the low-pressure turbine rotoron the fan rotor is consid