Dynamics of gas turbine engines rotors taking into account non-linear effects

O. Repetckii1 , I. Ryzhikov2 , Tien Quyet Nguyen3

1Irkutsk State Agrarian University named after A.A. Ezhevsky, Irkutsk, Russia

2, 3Irkutsk National Research Technical University, Irkutsk, Russia

2Corresponding author

Vibroengineering PROCEDIA, Vol. 8, 2016, p. 361-365.
Received 29 June 2016; accepted 3 September 2016; published 7 October 2016

Copyright © 2016 JVE International Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Creative Commons License

Different types of non-linearity must be considered in solving the problem of determining the fatigue life of gas turbine engines rotors on the base of numerical methods. When turbomachinery rotors are simulated for assessment their fatigue life it is necessary take into account geometrical and physical nonlinearity of the model. As a result of partial steam or gas admission and edge tracks from stator blades it is important to consider the non-linear nature of the loads impacting on the rotor elements during the transient conditions of the work. While determining real stresses at the last stage of fatigue life assessment it is also necessary to take into account their non-linear nature.

Keywords: gas turbine engines rotors, stress, fatigue life, natural frequencies, mode shapes.


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