Abstract
After considering the yawing motion, the dynamic model of the marine rotor-bearing system is developed on the short bearing theory. Theoretical analysis shows that the yawing motion causes gyroscopic moment and strong nonlinear time-varying transport inertia moment. The dynamic characteristics of the rotor-bearing system with and without yawing motion are compared. The result shows that the yawing motion significantly affects the dynamic characteristics of the rotor-bearing system, which makes the rotor system be dominated by the quasi-period. The yawing motion makes the rotor amplitude increase significantly at low speed. Finally, under the influence of yawing motion, the dynamic characteristic of the rotor shows chaos at high speed.
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