Dynamic characteristics of marine rotor-bearing system under heaving motion

被引：0
|
作者：
Han Y.-C. [1 ]
Li M. [1 ,2 ]
机构：
[1] Department of Mechanics, Xi'an University of Science and Technology, Xi'an
[2] Theory of Lubrication & Bearing Institute, Xi'an Jiaotong University, Xi'an
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2019年 / 32卷 / 03期
关键词：
Heaving; Marine rotor-bearing system; Nonlinear dynamics; Short bearing model;
D O I：
10.16385/j.cnki.issn.1004-4523.2019.03.015
中图分类号：
学科分类号：
摘要：
With the ship heaving motion considered, the dynamic behaviors of the marine rotor-bearing system is studied in this paper. First, the dynamic model of the rotor-bearing system under the heaving motion is established based on the short bearing theory in the non-inertial reference system, in which the geometric nonlinearity is found to take place in the marine rotor-bearing system when with the action of heaving motion is taken into account. In addition, the dynamic characteristics, such as the bifurcation diagram, the maximum Lyapunov exponents, the steady state response, the rotor orbit and its Poincaré map are analyzed through numerical method, and the results are compared with those of the rotor-bearing system without heaving motion. Finally, the influence of the amplitude of the heaving excitation on the nonlinear dynamic characteristics of the rotor-bearing system is studied. The results show that the system exhibits a single cycle motion at low rotating speed and the heaving motion effect for this situation is obvious. With the increase of the speed, the phenomena of quasi-periodic, period two and double Hopf bifurcations occur in the system, and its dynamic characteristics present a single cyclic motion, quasi-periodic, period two and chaos etc.. © 2019, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：501 / 508
页数：7
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