The application discloses a kind of based on rough contact interface
turbomachinery center pull rod rotor modeling
analysis method, belong to
turbomachinery high temperature rotor technical field.The present application includes calling pre-trained contact stiffness prediction model, input current operating condition roughness parameter and load parameter, obtain the predicted stiffness of contact interface;The three-dimensional finite
element model of rotor is established, the mesh division is carried out to contact interface area, and nonlinear spring damping unit is set between the corresponding nodes of contact interface;The predicted stiffness obtained is given to the nonlinear spring damping unit, and the reduced
degrees of freedom are carried out to the finite
element model after stiffness assignment using
hybrid modal reduction method, and the
reduced model is solved for
vibration response, the fidelity of the model is ensured, the
full model solving degree of freedom is greatly compressed by
hybrid reduction method, while not affecting the accuracy of the model, reduce the amount of calculation, facilitate the analysis and solution of model.