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Communication Dans Un Congrès Année : 2009

The problem of complex shape tracking in a Campbell Diagram or how to overcome crossing/veering phenomena

Résumé

The correlation criterion proposed in this article and called NC2O (Normalized Cross Complex Orthogonality) ensures bi-orthogonality properties between rotor mode shapes calculated at different speeds of rotation. This criterion is proofed on an industrial laminated rotor composed of disks and two fluid film bearings, whose stiffness and damping characteristics depend on the speed of rotation. The industrial finite element model shows that the NC2O criterion provides a more efficient mode pairing of rotor shapes than those obtained by using the classical correlation criteria. Moreover this criterion maker easier the Campbell diagram plotting of strongly _ -dependent structures
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hal-00936547 , version 1 (08-07-2024)

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Guillaume Mogenier, Thouraya Baranger, Guy Ferraris, Régis Dufour, Lionel Durantay. The problem of complex shape tracking in a Campbell Diagram or how to overcome crossing/veering phenomena. 10th International Conference on Vibrations in Rotating Machinery, Aug 2009, London, United Kingdom. pp.1-11, ⟨10.1533/9780857094537.4.257⟩. ⟨hal-00936547⟩
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