The working environment of gas turbine rotors is very poor,and the rotor structure is prone to crack faults.In order to solve the problem of difficult identification of gas turbine rotor cracks,taking a certain type of gas turbine high-pressure rotor as the research object,the working conditions were simula-ted by three-dimensional modeling and ABAQUS simulation.First,the location where cracks were prone to occuring was simulated and calculated;then,crack models of different sizes were preset in the three-dimensional model of the rotor for the location where cracks were prone to occuring,obtaining the crack propagation situation of the rotor;finally,a certain load was applied on the rotor model after the crack propagated,and the tension and compression stiffness,torsional stiffness and bending stiffness of the rotor were measured in different crack states.The results show that the high-pressure turbine sealing disc area of a certain type of gas turbine high-pressure rotor is prone to crack failure,and the rotor stiffness shows a decreasing trend with the increase of cracks.
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