燃气轮机转子工作环境恶劣，转子结构易出现裂纹故障，为了解决燃气轮机转子裂纹难以被识别的问题，以某型燃气轮机高压转子为研究对象，通过三维建模以及ABAQUS仿真模拟其工作状态。首先，对易产生裂纹的位置进行了仿真计算；然后，在转子三维模型中对易产生裂纹的位置预置大小不同的裂纹模型，得到转子裂纹拓展情况；最后，在裂纹拓展后的转子模型上施加一定载荷，测量转子在不同裂纹状态下的拉压刚度、扭转刚度以及弯曲刚度。结果表明：某型燃气轮机高压转子的高压涡轮封严轮盘区域易出现裂纹故障，且转子刚度伴随裂纹增大呈下降趋势。

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 simulated 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.

TK473