Open AccessDynamic Characteristics Analysis of Cracked Magnetic Rotor-Bearing System
Author(s) -
Yingjun Yang,
Lingyun Zhang,
Yanxia Zhang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1637/1/012116
Subject(s) - eccentricity (behavior) , bifurcation , chaotic , helicopter rotor , rotor (electric) , bifurcation diagram , motion (physics) , control theory (sociology) , bearing (navigation) , mechanics , amplitude , critical speed , physics , classical mechanics , computer science , nonlinear system , optics , control (management) , quantum mechanics , artificial intelligence , astronomy , political science , law
A dynamic model of the rotor system supported by active magnetic bearings at both sides is established, the fourth-order Runge-Kutta method is used to simulate. The periodic motion transition of the system and its evolution to chaotic motion are discussed from bifurcation diagrams and phase diagrams. It emphatically analyse the change of crack influencing factor and eccentricity on the system response and stability. The results show that the system presents period motion with appropriate parameter conditions. Large crack fatigue damage and value of eccentricity increases the amplitude and chaotic motion window in the low speed region, decrease the system stability. When the rotor crosses the critical speed range and reaches the high rotational speed region, the stable period-1 motion is dominant.