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research-article

Thermomechanical model reduction for efficient simulations of rotor-stator contact interaction

[+] Author and Article Information
Nicolas Guerin

École Centrale de Lyon, Laboratoire de Tribologie et Dynamique des Systémes, Écully, France; Safran Helicopter Engines, Bordes, France
nicolas.guerin@ec-lyon.fr

Anders Thorin

Structural Dynamics and Vibration Laboratory, McGill University, Montreal, Canada
anderstood@gmail.com

Fabrice Thouverez

École Centrale de Lyon, Laboratoire de Tribologie et Dynamique des Systémes, Écully, France
fabrice.thouverez@ec-lyon.fr

Mathias J. Legrand

Structural Dynamics and Vibration Laboratory, McGill University, Montreal, Canada
mathias.legrand@mcgill.ca

Patricio Almeida

Safran Helicopter Engines, Bordes, France
patricio.almeida@safrangroup.com

1Corresponding author.

ASME doi:10.1115/1.4040858 History: Received June 26, 2018; Revised July 05, 2018

Abstract

Turbomachinery rotor-stator unilateral contact induced interactions play a growing role in lifecycle analysis and thus motivate the use of accurate numerical prediction tools. Recent literature confirmed by ongoing in-house experiments have shown the importance of thermomechanical coupling effects in such interactions. However, most available (possibly reduced-order) models are restricted to the sole mechanical aspects. This work describes a reduction technique of thermomechanical models involving unilateral contact and frictional contact occurrences between rotor and stator components. The proposed methodology is grounded on Guyan and Craig--Bampton methods for the reduction of the structural dynamics in conjunction with Krylov subspace techniques, and specifically the Craig--Hale approach, for the reduction of the thermal equations. The method has the capability to drastically reduce the size of the model while preserving accuracy. It stands as a reliable strategy to perform simulations of thermomechanical models with localized mechanical and thermal loads.

Copyright (c) 2018 by ASME
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