大型汽轮发电机组转子轴系扭振弹性波的解析研究

STUDY ON ELASTIC WAVE OF TORSIONAL VIBRATION IN TURBOGENERATOR ROTOR SHAFT SYSTEM

建立了汽轮发电机组轴系的弹性连续体扭振模型，提出了求解复杂阶梯轴系扭振波动方程的解析方法。计算了一台２００ＭＷ机组转子轴系扭振波动特性的精确解，并与离散系统计算结果做了比较。根据机组扭振干扰力矩的复杂性和随机性，利用该方法进行了网机耦合作用下的扭振强迫振动考核。

A torsional vibration model of elastic continuous systems is established for a turbogenerator rotor shaft system. An analysis method tosolve torsional wave equation of a complex stepped shaft system is presented. The properties of torsional vibration wave in a 200 MW of turbogenerator shaft system are calculated. The calculating results of the continuous system are compared with the discrete system and experiment results. The characters of forced torsional vibration of turbogenerator shaft system due to short circuits or faulty synchronization are investigated by means of the method.