变转速动力涡轮转子模拟系统设计及试验

In view of the complex working conditions and prominent vibration of the variable speed turbine rotor，the optimization design technology of the variable speed power turbine rotor support layout and squeeze film damper was established. Based on the theory of similar structure and dynamics， a rotor experimental system simulating a certain type of engine was designed and built to verify the critical speed distribution， vibration mode and rotor vibration response characteristics under each scheme. The experimental analysis of the impact of damper structural parameters was carried out to provide support for the design of squeeze film damper of variable speed power turbine rotor. The research results showed that the maximum error in calculating the critical speed of the rotor experimental system was below 5%， and the maximum error in modal vibration mode was below 7%， which verified the accuracy of the dynamic characteristics calculation method. Through optimization of the rotor support structure and damper， the vibration amplitude of the rotor was reduced by 67.3%， and the operation was more stable within the working range of variable speed， which verified the effectiveness of the proposed variable speed turbine rotor vibration reduction scheme，thus laying a foundation for the dynamic design experimental verification research.