The bifurcation points, bifurcation diagram and three circumstances of period solution bifurcation leading to unstability are acquired for SFD rotor system, namely saddle node bifurcation, Hopf bifurcation and period doubling bifurcation.

• 数值计算得到了SFD 转子系统发生周期解分叉时的分叉点、分叉图及周期解分叉而失稳的 3种情况 :即鞍结分叉、Hopf分叉及倍周期分叉。 最后采用Floquet理论对SFD 转子系统的稳定性进行了分析。