From Domain Decomposition to Model Reduction for Large Nonlinear Structures

Autor: Leturcq, Bertrand, Le Tallec, Patrick

Publikováno v: Comptes Rendus. Mécanique, Vol , Iss , Pp 1-17 (2023)

The numerical simulation of multiscale and multiphysics problems requires efficient tools for spatial localization and model reduction. A general strategy combining Domain Decomposition and Nonuniform Transformation Field Analysis (NTFA) is proposed

Externí odkaz: https://doaj.org/article/a2bd62cf542b4c3fb96e2e5ea49f1815

A new reduced order model to represent the creep induced fuel assembly bow in PWR cores

Autor: Leturcq, Bertrand, Le Tallec, Patrick, Pascal, Serge, Fandeur, Olivier, Lamorte, Nicolas

Publikováno v: In Nuclear Engineering and Design 1 August 2022 394

Réduction de modèles thermomécaniques non linéaires d'assemblages combustibles en vue d'un calcul de coeur REP

Autor: Leturcq, Bertrand

Publikováno v: Sciences de l'ingénieur [physics]. école Polytechnique, 2022. Français. ⟨NNT : 2022IPPAX029⟩

Fuel assemblies deform progressively by a few millimeters within the core of pressurized water reactors. The main reasons are the hydraulic forces exerted by the coolant, the creep under irradiation and the contact-friction of the rods in the grids.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3515::2dfc9c3751fc910fb06b364dfbdc5656
https://theses.hal.science/tel-03990361/document

NTFA inspired model order reduction including contact and friction

Autor: Leturcq, Bertrand, Le Tallec, Patrick, Pascal, Serge, Fandeur, Olivier, Pacull, Julien

Publikováno v: 14th. Worl Congress on Computationnal Mechanics (WCCM 14)
14th. Worl Congress on Computationnal Mechanics (WCCM 14), Jan 2021, Paris, France

International audience; Key Words: Model reduction, NTFA, Creep, Contact, Friction.Dealing with dimensional stability in nuclear industry often leads to consider irradiationcreeping as well as contact and friction. However, large detailed models requ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3cec6a0fdd12f6bb770af444167fffdc
https://hal.archives-ouvertes.fr/hal-03202024

Reduction of a mechanical model dedicated to the study of assembly bow

Autor: Leturcq, Bertrand, Pascal, Serge, Le Tallec, Patrick, Pacull, Julien

Publikováno v: SMIRT-25-25th International Conference on STRUCTURAL MECHANICS in REACTOR TECHNOLOGY
SMIRT-25-25th International Conference on STRUCTURAL MECHANICS in REACTOR TECHNOLOGY, Aug 2019, Charlotte, United States

International audience; In the pressure vessel of a PWR, the core is filled of up to 241 fuel assemblies. Under operation, they are subjected to irradiation growth, creeping, tightening relaxation and rod slipping. Combined with the hydraulic forces

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::6979906dc4a600b59bd0f290767510c3
https://hal-cea.archives-ouvertes.fr/cea-02478398/document