STUDY OF STATOR STRUCTURE MODELING FOR ROTOR DYNAMIC ANALYSIS

ABSTRACT When applying the rotor dynamic analysis model to the design of the lightweight and flexible stator structure of aeroengines, it is indispensable to consider stator-structure dynamics. In order to simulate stator-structure dynamics, entire engine system are modeled by several layers including stator structures in the Transfer Matrix Method. Additionally, in the context of an accurate analysis of stator-structure dynamics, the Transfer Matrix Method has been found to be very useful when using Direct Matrix to calculate stiffness and mass matrix data with the aid of the finite element method. A stator-structure model is evaluated by measuring engine vibration data under normal imbalance conditions. Then selecting 25 quantitative parameters that characterize engine vibration, these parameters are optimized to minimize the difference between the calculated response and the measured vibration data. Optimization results show the influence of these parameters upon engine vibration characteristics. These investigations are effective in helping to improve engine stator-structure modeling techniques