Open AccessVariation Law and Experimental Study on Multi-stage Critical Speed of an Aero-engine Power Turbine Rotor
Author(s) -
Weijian Nie,
Wenfeng Deng,
Chen Yag
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1081/1/012028
Subject(s) - critical speed , rotor (electric) , stiffness , turbine , power (physics) , finite element method , range (aeronautics) , helicopter rotor , computer science , control theory (sociology) , power law , mechanical engineering , structural engineering , engineering , physics , aerospace engineering , mathematics , control (management) , quantum mechanics , artificial intelligence , statistics
Finite element method was used to establish the calculation model of the dynamic characteristics of the simulated power turbine rotor, and the dynamic characteristics of the rotor were systematically calculated and analysed. The variation law of the first three stages critical speeds of the rotor with the supporting stiffness and the mass of each disk were revealed. The dynamic characteristics test of the simulated power turbine rotor in the full speed range was completed, and the calculation results and test results were compared and analysed. The results show that the calculation model reflects the dynamic characteristics of the rotor well, and the rationality of the rotor structure design, supporting layout and critical speed distribution were verified. The study provides a theoretical basis for the adjustment of critical speed based on the supporting stiffness and disk’s mass, it also provides technical reference for the real rotor structure design and test.