Multiharmonic analysis of nonlinear whole engine dynamics with bladed disc-casing rubbing contacts

Petrov, E P (2012) Multiharmonic analysis of nonlinear whole engine dynamics with bladed disc-casing rubbing contacts. In: ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, Volume 7: Structures and Dynamics, Parts A and B, Copenhagen, Denmark, June 11–15, 2012. Proceedings of the ASME Turbo Expo . American Society of Mechanical Engineers (ASME), pp. 1181-1191.

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Abstract

A method has been developed for frequency domain analysis of steady state forced response in gas turbine engines in the presence of rubbing and snubbing contacts between bladed discs and casing and between other rotor and stator engine components. The multiharmonic contact interface elements have been derived for modelling the nonlinear contact interactions: (i) at bearings and (ii) bladed disc-casing rubbing contacts with using flexible models for rotor and stator structures. The elements allow for the asymmetry of the casing, the discrete blade contacts with casing, individual blade-casing gap values, nonlinear dependency of the contact forces on rotor-stator incursion and friction forces, intermittent contacts between blades and the casing. High accuracy and computational efficiency of the methods and models developed has been demonstrated on a set of test cases and on an example of analysis of a realistic gas turbine structure. Copyright 2012 by ASME.

Item Type: Book Section
Additional Information: Paper No. GT2012-68474
Keywords: Gas turbines Engines Exhibitions Frequency domain analysis Friction Rotors (windings) Stators
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ0170 Mechanics applied to machinery. Dynamics
T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL0500 Aeronautics. Aeronautical engineering
Depositing User: Yevgen Petrov
Date Deposited: 04 May 2015 07:35
Last Modified: 05 May 2015 07:26
URI: http://sro.sussex.ac.uk/id/eprint/53864
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