Finite element analysis model for generator rotor shaft-retaining ring-end disc system was established.On this basis

the thermal and stress analysis was carried out under conditions with static state

stable rated load condition

varying load condition and several start-up/cooling-down procedures.The iterated constraint equation method was used to calculate the contact stress between the rotor shaft

retaining ring and end disc.The steady and transient temperature field and the stress field of the rotor ring were obtained.The results show that

the maximum equivalent stress at the area with the most weak low cycle fatigue life appears at the cold static state

which is 967.35 MPa.The maximum contact stress between rotor shaft and retaining ring also appears at the cold static state

which is up to 1 364.50 MPa.