Author:
Zhang Wenzhuo,Li Ming,Liu Gang
Abstract
Abstract
In order to study the motion law of the rotor-bearing system under ship pitching motion, the dynamic model of the marine rotor-bearing system is established. The dynamic characteristics of the system with different speeds are analysed by numerical method, such as Poincaré map, the frequency spectrum, and the largest Lyapunov exponents. The results show that with the increase of the rotational speed, there are abundant dynamic phenomena, such as single period, quasi-period and quasi-period of the upper and lower branches. Moreover, due to influence of the pitching motion of ship, the rotor tilts in the bearings and its procession occurs obviously, which affects the stability of the operation of rotor-bearing system. The findings of this study will contribute a comprehension of the nonlinear dynamic behaviours of the rotor-bearing system subjected to ship pitching motion.
Subject
General Physics and Astronomy
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