发电机组轴系电磁激发横扭耦合振动  

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

作　　者：杨志安[1] 李文兰[2] 邱家俊[1] 

机构地区：[1]天津大学机械工程学院 [2]天津大学图书馆,天津300072

出　　处：《天津大学学报》2008年第5期583-588,共6页Journal of Tianjin University(Science and Technology)

摘　　要：按机电分析动力学的方法,求得发电机气隙磁场能,建立了发电机组轴系具有周期系数的横扭耦合非线性振动方程.应用非线性振动的改进平均法,求得发电机组轴系横振主共振-主参数共振解并进行数值计算.分析了有功功率、激磁电流、偏心等参数对幅频响应曲线的影响.随着有功功率的增大,幅频响应曲线的振幅减小;随着激磁电流的增大,幅频响应曲线的振幅减小;随着偏心的增大,共振区加宽.Based on mechano-electronic analysis dynamics theory, the 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 oscillations, the approximation solution of primary resonance with primary parametric resonance of lateral vibration of generator shafting was obtained, 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 power, the amplitude of response curve decreases. With the increase of magnetizing current, the amplitude of response curve decreases. With the increase of eccentricity, the region of resonant enlarges.

关 键 词：发电机组 电磁激发 横扭耦合 主共振-主参数共振 平均法 

分 类 号：O325[理学—一般力学与力学基础] TM301.5[理学—力学]