Real-time Bayesian data assimilation with data selection, correction of model bias, and on-the-fly uncertainty propagation - 03/12/19
Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
| pages | 18 |
| Iconographies | 18 |
| Vidéos | 0 |
| Autres | 0 |
Abstract |
The work introduces new advanced numerical tools for data assimilation in structural mechanics. Considering the general Bayesian inference context, the proposed approach performs real-time and robust sequential updating of selected parameters of a numerical model from noisy measurements, so that accurate predictions on outputs of interest can be made from the numerical simulator. The approach leans on the joint use of Transport Map sampling and PGD model reduction into the Bayesian framework. In addition, a procedure for the dynamical and data-based correction of model bias during the sequential Bayesian inference is set up, and a procedure based on sensitivity analysis is proposed for the selection of the most relevant data among a large set of data, as encountered for instance with full-field measurements coming from digital image/volume correlation (DIC/DVC) technologies. The performance of the overall numerical strategy is illustrated on a specific example addressing structural integrity on damageable concrete structures, and dealing with the prediction of crack propagation from a damage model and DIC experimental data.
Le texte complet de cet article est disponible en PDF.Keywords : Data assimilation, Bayesian inference, Model reduction, Modeling error, Real-time simulations, Full-field measurements, Uncertainty quantification
Plan
Vol 347 - N° 11
P. 762-779 - novembre 2019 Retour au numéro
Article précédent
- Code2vect: An efficient heterogenous data classifier and nonlinear regression technique
- Clara Argerich Martín, Ruben Ibáñez Pinillo, Anais Barasinski, Francisco Chinesta
- Incremental dynamic mode decomposition: A reduced-model learner operating at the low-data limit
- Agathe Reille, Nicolas Hascoet, Chady Ghnatios, Amine Ammar, Elias Cueto, Jean Louis Duval, Francisco Chinesta, Roland Keunings
Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’achat d’article à l’unité est indisponible à l’heure actuelle.
Déjà abonné à cette revue ?