Quantification of uncertainties in nonlinear vibrations of turbine blades with underplatform dampers

S. Bhatnagar, J. Yuan, A. Fantetti, E. Denimal, L. Salles

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

The high cycle fatigue life of turbine blades is negatively impacted by high frequency mechanical vibrations caused during operation. One method to mitigate this risk is to use underplatform dampers to dissipate energy from the system and reduce the vibration amplitude. Unfortunately, the state of the art models for such simulations are deterministic, although literature indicates that a large amount of uncertainty exists in measured contact parameters. This uncertainty in the contact parameters leads to significant variations in vibration response. This paper quantifies these uncertainties by considering the input parameters to be stochastic and generating uncertainty bands. A nonlinear solver based on Multi-Harmonic Balance method is used to propagate these uncertainties, and a surrogate model is implemented to increase the computational efficiency. Variance based sensitivity analysis is also performed to rank the importance of each uncertain parameter.

Original languageEnglish
Title of host publicationProceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics
EditorsW. Desmet, B. Pluymers, D. Moens, S. Vandemaele
PublisherKU Leuven - Departement Werktuigkunde
Pages3885-3895
Number of pages11
ISBN (Electronic)9789082893113
Publication statusPublished - 2020
Externally publishedYes
Event2020 International Conference on Noise and Vibration Engineering, ISMA 2020 and 2020 International Conference on Uncertainty in Structural Dynamics, USD 2020 - Leuven, Belgium
Duration: 7 Sep 20209 Sep 2020

Publication series

NameProceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics

Conference

Conference2020 International Conference on Noise and Vibration Engineering, ISMA 2020 and 2020 International Conference on Uncertainty in Structural Dynamics, USD 2020
Country/TerritoryBelgium
CityLeuven
Period7/09/209/09/20

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