| This article takes the 9FA gas turbine rotor-bearing system and large single-shaft combined-cycle power generation system as the research object. It summarized concretely the gas turbine and large single-shaft combined-cycle power generation rotor structure that every domestic and recommended the modeling method of the gas turbine rotor-bearing system with ANSYS computation software and its modal analysis and harmonic response analysis. Dynamic parameters such as natural frequency of the rotor-bearing system were calculated. Furthermore the response of the rotor-bearing system under varies unbalance and rubbing conditions was analyzed. The response of the rotor on different size, direction and position of unbalance and rub-impact force was shown in form of orbit changing of the rotor system. In addition, the response of the rotor under different kind of rub-impact is simulated.
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