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Communication Dans Un Congrès Année : 2024

Numerical and experimental investigations of an on-board rotor subject to multiaxial excitations

Résumé

This work addressed the experimental validation of an on-board rotor model supported by finite-length hydrodynamic bearings and subject to a wide variety of excitations, such as translations and/or rotations, mono-or multi-axial and with harmonic or random time profiles. Such excitations combined with mass unbalance forces play a considerable role in their integrity because they can cause parametric instability and rotor–stator interactions. Consequently, predicting the rotordynamics of such machines is crucial to avoid triggering undesirable phenomena able to yield failure or at least limiting their impacts. In this context, the present paper proposes an experimental validation of a numerical model of a rotor-shaft-hydrodynamic bearing system mounted on a moving base. The model is based on a finite element approach with Timoshenko beam finite elements having six degrees of freedom (DOF) per node to account for the bending, torsion and axial motions. The experimental validation of the model is carried out with a rotor test rig, designed, built, instrumented and mounted on a 6-DOF hydraulic shaker (Team Cube). The rotordynamic behavior in bending and axial motions is assessed with base motions consisting of mono- and multi-axial translations and rotations with harmonic or random profiles. The comparison of the predicted and measured results achieved in terms of time history displacement, shaft orbits and full spectrums transient is very accurate, highlighting the validation of the model proposed.
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Dates et versions

hal-04533242 , version 1 (04-04-2024)

Identifiants

  • HAL Id : hal-04533242 , version 1

Citer

E. Chatelet, Yvon Briend, Régis Dufour, Marie-Ange Andrianoely, Naulleau Antoine. Numerical and experimental investigations of an on-board rotor subject to multiaxial excitations. International Modaml Analysis Conference (IMAC), Society for Experimental Mechanics, Jan 2024, Orlando (FL), United States. ⟨hal-04533242⟩
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