Rotor-bearing multi-source excitation nonlinear system modeling method

The invention discloses a rotor-bearing multi-source excitation nonlinear system modeling method, which comprises the steps of establishing a bending-torsion coupling kinetic model of a rotor-bearingsystem according to a lumped parameter method principle, and calculating structural parameters of the rotor-bearing system; calculating the internal excitation force of the manufacturing parameters and the internal excitation force of the assembly parameters according to the bending-torsion coupling kinetic model of the rotor-bearing system; introducing the calculated structural parameters, manufacturing parameter internal excitation force and assembly parameter internal excitation force of the rotor-bearing system, and establishing a dynamic differential equation of the rotor-bearing system according to a centroid motion theorem and a momentum moment theorem. The technical problem that consideration factors of an existing rotor-bearing system model are not comprehensive is solved. 本发明公开了一种转子-轴承多源激励非线性系统建模方法，包括：根据