关键词: 推进轴系;燃机并入;SSS离合器;冲击载荷;瞬态响应

Abstract: To evaluate the dynamic response of the propulsion shafting under impact load during the engagement process of gas turbine in the combined power plant， starting from the meshing process of the SSS clutch（synchro-self-shifting clutch）， the dynamic simulation model was established and the simulation was carried out. It is found that during the process of meshing， a kind of torque impact occurs simultaneously， which could have considerable influence on the safety of the shafting. Taking torque impacts under different working conditions as the excitation， the transient torsional vibration of the propulsion shafting was carried out， and the dynamic response of stress on the propeller shaft and turbine shaft were obtained. The maximum stress of the propeller shaft is 32.77MPa and the maximum stress of the turbine shaft is 78.17MPa.The results show that the damping characteristics of the dashpot and the loading characteristic of the gas turbine have significant influence on the impact load and response of propeller shafting. To ensure the safety of the shafting， the damping parameters of the dashpot should be appropriately selected and the engagement operation should be carried out under low fuel supply.

Key words: Propulsion shafting;Engagement process of gas turbine;SSS clutch;Impact load;Transient response