The study of nonlinear vibration analysis of rotor system using Component Mode Synthesis method (Analysis using the harmonic balance method)

In this paper, an effective method for the nonlinear vibration analysis of rotor systems is proposed using the Component Mode Synthesis method and the harmonic balance method. In the method, the system is divided into components and the differential equations for each frequency and component is derived. The equation of motion for the whole system, then, is obtained using the Component Mode Synthesis method. The dynamic analysis of a rotor system is carried out using the harmonic balance method. The distinguishing feature of the proposed method is that the nonlinear restoring force term is expressed using modal coordinate system in a convenient form. The order of the modal equation of motion and calculation time, therefore, can be reduced. In the numerical example, it is shown that the analysis method proposed in this paper is effective for the nonlinear vibration analysis of rotor systems.