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Communication Dans Un Congrès Année : 2023

HARMONIC MODAL ANALYSIS USING HYDROELECTRIC RUNNER STEADY-STATE STRAIN GAUGE MEASUREMENTS

Résumé

The characterization of hydraulic turbine runners’ dynamic behaviour is essential for accurate stress and fatigue life prediction leading to design and maintenance adapted to the fluctuating power demand. As the modal parameters of runners depend on the operating regime and coupling effects, a representative estimation of these parameters relies on the analysis of in-operation data. However, harmonics contained in Francis runners strain response complexify the use of traditional operational modal analysis methods. This paper proposes a steady-state harmonic modal analysis method using Non-Trivial Rotor-Casing Interactions (NTRCI). The Bayesian method used to identify the parameters is first presented. The method is evaluated on a ground truth system obtained with an analytically generated strain response and then deployed on operating runner strain gauge measurements. The paper concludes with a discussion and future works related to the exhaustivity of the proposed mode
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Dates et versions

hal-04165862 , version 1 (19-07-2023)

Identifiants

  • HAL Id : hal-04165862 , version 1

Citer

Nicolas Morin, Quentin Dollon, Jérôme Antoni, Souheil-Antoine Tahan, Christine Monette, et al.. HARMONIC MODAL ANALYSIS USING HYDROELECTRIC RUNNER STEADY-STATE STRAIN GAUGE MEASUREMENTS. Surveillance, Vibrations, Shock and Noise, Institut Supérieur de l'Aéronautique et de l'Espace [ISAE-SUPAERO], Jul 2023, Toulouse, France. ⟨hal-04165862⟩
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