In modern turbo machines such as aircraft jet engines, contact between the casing and bladed disk may occur through a variety of mechanisms: coincidence of vibration modes, thermal deformation of the casing, rotor imbalance, etc. These nonlinear interactions may result in severe damage to both structures and it is important to understand the physical mechanisms that cause them and the circumstances under which they occur. In this study, we focus on the phenomenon of interaction caused by modal coincidence. A simple two-dimensional model of the casing and bladed disk structures is introduced in order to predict the occurrence of the interaction phenomenon versus the rotation speed of the rotor. Each structure is represented in terms of its two k-nodal diameter vibration modes, which are characteristic of axi-symmetric structures and allow for travelling wave motions that may interact through direct contact. The equations of motion are solved using an explicit time integration scheme in conjunction with the Lagrange multiplier method where friction is considered. Results of the numerical tool and theory show good agreement in the prediction of rotational speed to be avoided. To conclude, the mathematical statements of a multi-frequency domain-method are proposed. This method is to be used to circumvent numerical issues inherent to time-marching procedures.
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ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
September 24–28, 2005
Long Beach, California, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
0-7918-4738-1
PROCEEDINGS PAPER
Aircraft Engine Structural Rotor-Stator Modal Interaction Available to Purchase
Mathias Legrand,
Mathias Legrand
E´cole Centrale de Nantes, Nantes, France
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Se´bastien Roques,
Se´bastien Roques
E´cole Centrale de Nantes, Nantes, France
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Bernard Peseux,
Bernard Peseux
E´cole Centrale de Nantes, Nantes, France
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Christophe Pierre
Christophe Pierre
University of Michigan, Ann Arbor, MI
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Mathias Legrand
E´cole Centrale de Nantes, Nantes, France
Se´bastien Roques
E´cole Centrale de Nantes, Nantes, France
Bernard Peseux
E´cole Centrale de Nantes, Nantes, France
Christophe Pierre
University of Michigan, Ann Arbor, MI
Paper No:
DETC2005-85251, pp. 2523-2532; 10 pages
Published Online:
June 11, 2008
Citation
Legrand, M, Roques, S, Peseux, B, & Pierre, C. "Aircraft Engine Structural Rotor-Stator Modal Interaction." Proceedings of the ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 1: 20th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C. Long Beach, California, USA. September 24–28, 2005. pp. 2523-2532. ASME. https://doi.org/10.1115/DETC2005-85251
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