Lateral and Torsional Coupling Vibration Excited by Electromagnetism of Turbogenerator Set Rotor System

Based on mechano-electronic analysis dynamics theoryt,he magnetic complement energy in air gap of generator was obtained.The differential equations with periodic coefficients of lateral and torsional coupling vibration system were established.By means of the method of improved averaging for nonlinear oscillationst,he approximation solution of primary resonance with primary parametric resonance of lateral vibration of generator shafting was ob-tained,and numerical analysis was carried out.The influences of real power,magnetizing current,and eccentricity on the system were analyzed.With the increase of real powert,he amplitude of response curve decreases.With the in-crease of magnetizing currentt,he amplitude of response curve decreases.With the increase of eccentricityt,he region of resonant enlarges.