The causes and essence of the torsional oscillat ion of large turbogenerator which consider as a kind of complex open system was investigated by using nonlinear science theory.

• 将大型汽轮发电机系统作为一类复杂开放系统，基于非线性科学分析了该系统的动力学特性，论述了该系统轴系扭振的原因及其本质。