Open AccessNonlinear Vibration Analysis of Generator Rotor of a Military General Mobile Power Plant
Author(s) -
Xiaoquan Li,
Jiangjiang He,
Yuwei Zhao,
Yuemeng Cheng
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/562/1/012166
Subject(s) - vibration , rotor (electric) , amplitude , eccentricity (behavior) , control theory (sociology) , nonlinear system , generator (circuit theory) , stiffness , resonance (particle physics) , engineering , duffing equation , physics , excitation , mechanics , power (physics) , acoustics , structural engineering , computer science , electrical engineering , law , optics , control (management) , particle physics , quantum mechanics , artificial intelligence , political science
The generator is the core component of the military general mobile electric power plant. In general, the rotor of generator has different degrees of eccentricity which affect the operation and even cause system failure. To explore the vibration characteristics of the rotor, the rotor of generator is taken as research object. A Jeffcott rotor system with cubic terms is established and reduced to Duffing equation. The multi-scale method is used to solve the first approximate solution of the forced vibration. The amplitude-frequency, phase-frequency response equation and the resonance conditions are obtained. The influence of different mechanical parameters on the lateral vibration and the main resonance of the system are studied: eccentricity and the stiffness have little effect on the amplitude variation, but have a great influence on the stability region; the main resonance frequency and the excitation change the magnitude of the system common amplitude value; the damping not only has a great influence on the common amplitude value, but also changes the response and phase.