【摘要】 建立了考虑弯扭耦合作用时 ,大型气轮发电机组转子轴系与电网耦合次同步谐振 ( SSR)的 1 9维非线性模型。运用数值方法 ,确定系统平衡位置稳定性的转变点 ,着重分析了在不同偏心条件下 ,弯曲振动与扭转振动之间的相互影响 ,同时给出了轴系弯曲刚度对系统稳定性的影响 ,证明在正常情况下 ,由偏心引起的弯扭耦合作用是非常弱的 ,可以不予考虑更多还原

【Abstract】 In this paper, the numerical integral method is applied to analyzing nonlinear subsynchronous resonance (SSR) for the coupling between the shafts of a turbine generator and an electric network, and one of the bifurcation points of the system between stable state and unstable state is determined. Particular stress is laid on the effect between the lateral oscillation and the torsional oscillation of a shaft with different eccentricity. At the same time, the influence of the shafts lateral stiffness on the stability of the system is considered. It is demonstrated that under the common condition the coupling between the lateral oscillation and the torsional oscillation is very weak and doesnt need to be considered.更多还原