An analysis of combined turbo-machine rotor to reveal its structural disfunction

Аuthors

Pykhalov A. A.^{1, 2*}, Ravikovich Y. A.^3**

1. Irkutsk National Research Technical University, 83, Lermontov str., Irkutsk, 664074, Russia
2. Irkutsk State Transport University (IrGUPS), 15, Chernyshevsky str., Irkutsk, 664074, Russia
3. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: pikhalov_aa@irgups.ru
**e-mail: yurav@mai.ru, yr@mai.ru

Abstract

There is a manufacturing joint between turbine disk and shaft in a rotor of gas-turbine engine needed to assure structural modularity requirements. The join changes physical properties of the combined rotor in comparison with a solid one. It concerns especially stiffness of the rotor. A technique is proposed based on the numerical finite-element method to analyze such properties and characteristics of the combined rotor as its deflected mode, amplitude frequency response, contact thermal conductivity. A special attention is paid to reveal structural disfunctions of the rotor. The technique enables a constructor to simulate a dynamic behavior of the rotor taking into consideration elasto-plastic material properties as well as contact thermal conductivity of conjugation surfaces.