Modèle hybride incertain pour le calcul de réponse en fonctionnement d'un alternateur

Abstract : The complex structural dynamic behavior of alternator must be well understood in order to insuretheir reliable and safe operation. The numerical model is however difficult to construct mainlydue to the presence of a high level of uncertainty. The objective of this work is to providedecision support tools in order to assess the vibratory levels in operation before to restart thealternator. Based on info-gap theory, a first decision support tool is proposed: the objective hereis to assess the robustness of the dynamical response to the uncertain modal model. Based on realdata, the calibration of an info-gap model of uncertainty is also proposed in order to enhance itsfidelity to reality. Then, the extended constitutive relation error is used to expand identified modeshapes which are used to assess the vibratory levels. The robust expansion process is proposed inorder to obtain robust expanded mode shapes to parametric uncertainties. In presence of lack-ofknowledge,the trade-off between fidelity-to-data and robustness-to-uncertainties which expressesthat robustness improves as fidelity deteriorates is emphasized on an industrial structure by usingboth reduced order model and surrogate model techniques.
Complete list of metadatas

Cited literature [130 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01263702
Contributor : Abes Star <>
Submitted on : Thursday, January 28, 2016 - 10:23:06 AM
Last modification on : Friday, May 17, 2019 - 1:59:35 PM
Long-term archiving on : Friday, April 29, 2016 - 10:12:59 AM

File

these_A_KUCZKOWIAK_Antoine_201...
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01263702, version 1

Citation

Antoine Kuczkowiak. Modèle hybride incertain pour le calcul de réponse en fonctionnement d'un alternateur. Mécanique [physics.med-ph]. Université de Franche-Comté, 2014. Français. ⟨NNT : 2014BESA2033⟩. ⟨tel-01263702⟩

Share

Metrics

Record views

412

Files downloads

357