针对国产发电机的具体特点，本文首次给出了计算大型发电机转子本体部分扭转等效直径的公式，此外，还对转子上其他一些结构的模化作了探讨。
The formula calculating the equivalent diameter of torsional stiffness for domestic turbogenerator rotor is presented, and the modelling of some special structures on the rotor is discussed as well.
当本体长度达到直径的6倍以上时，转子的第二临界速度将接近于电机的运转速度，运行中可能发生较大的振动。
When the body length to 6 times the diameter of the above, the rotor speed will close to the critical speed motors, operation of vibration may occur.
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