Research on asymmetrical supporting rotor system with radial clearance

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Li, Mo^1 ; Liu, Yongbao^1 ; Wang, Qiang^1,2

College of Power Engineering, Naval University of Engineering, Wuhan Hubei

430033, China^1

College of Weapon Engineering, Naval University of Engineering, Wuhan, HUBEI

430033, China^2

关键词: Bifurcation diagram;    Complex rotor system;    Dynamic characteristics;    Fourth order Runge-Kutta methods;    Nonlinear behavior;    Nonlinear dynamic behaviors;    Support structures;    Theoretical design;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/4/042055/pdf
DOI  :  10.1088/1757-899X/382/4/042055

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, the dynamic model of the rotor with asymmetric support structure of ball bearing and cylindrical roller bearing is established based on the rotor support structure of a gas turbine. The influence of the radial clearance of the rolling bearing on the nonlinear dynamics of this type of rotor system is studied. The fourth-order Runge-Kutta method with variable step is adopted to analysis the dynamic characteristics of the system by using the bifurcation diagram, phase diagram, Poincaré section diagram and FFT diagram of the system. The result shows that when the radial clearance is small, the system has a long period of stability. The system will gradually exhibit nonlinear behaviors such as period 2 motion and chaotic motion with the increase of radial clearance. The research can help to reveal the nonlinear dynamic behaviors of the rotor system with radial clearance of the rolling bearing and provide some theoretical basis for the theoretical design and fault diagnosis of complex rotor system.