04.2 - Aerostructures Design, Structural Dynamics, Aeroelasticity
AIRCRAFT ENGINE ROTOR DYNAMICS ANALYSIS AFTER FAN BLADE-OUT WITH ACCOUNT OF ROTOR-CASING CONTACT INTERACTIONS
V.Y. Myasnikov¹, I.I. Ivanov¹, B.S. Blinnik¹; ¹CIAM, Russia
An approach to rotor-casing system dynamics modeling in case of FBO is presented. The proposed model assumes the instantaneous unbalance character and accounts for possible rotor-casing contact interactions, changes in rotor speed and the passage of unbalanced rotor through resonance. Blade impact and its interactions with the trailing blades are neglected. Suggested method is implemented in a developed software based on a C++ code. Correctness of the implementation and the adequacy of the results are tested based on comparison with MSC Nastran and LS-Dyna calculations.