A l'occasion de ce workshop, le CSMA Juniors vous propose des conférences plénières sur des thèmes variés, des ateliers numériques sur des outils, une table ronde sur le thème de la recherche et l'écologie et plein d'autres choses encore.
Le workshop débutera à 10h00 le jeudi 30 mars et se terminera à 16h15 le 31 mars.
JEUDI 30/03/23
9h- 9h30 | Accueil, café
10h | Ouverture du Workshop
- Mot d’accueil de J. Girardot, président du bureau CSMA Juniors
- Mot d’accueil de D. Néron, président de CSMA
10h30 | Plénière #1
Imagerie de synthèse pour la mécanique numérique et expérimentale
Matthieu Vitse, LMPS, matthieu.vitse@ens-paris-saclay.fr
Les outils de génération d’images de synthèse, utilisés pour la réalisation d’effets spéciaux ou de films d'animation, peuvent s’avérer utiles pour les sciences numériques et expérimentales à bien des égards : générations de banques d’images pour les algorithmes d'apprentissage, design virtuel d’essais complexes, visualisation de données, communication scientifique. Blender (www.blender.org), logiciel open source et gratuit, s’impose de plus en plus comme un outil essentiel dans la communauté de l’imagerie numérique photo-réaliste (studios de jeux vidéos, films d’animation, …) et commence à trouver une (petite) place au sein de différentes communautés scientifiques (représentation de protéines complexes, essais virtuels, vulgarisation scientifique, …).
11h30 | Plénière #2
Fourier-based solvers for diffusion & wave propagation phenomena
Faisal Amlani, LMPS, faisal.amlani@ens-paris-saclay.f
The use of Fourier analysis for frequency domain representation or high-order trigonometric interpolation can be found in a plethora of applications throughout science and engineering, including those related to surface representation, scattered data approximation, signal processing, and differential equations. This talk discusses, in particular, solving high-resolution discretized problems (e.g., those governed by partial differential equations, or PDEs) by such approaches via capitalizing on the relatively low computational complexity and memory requirements involved in computing fast Fourier transforms (FFTs). Indeed, by reducing convolution and differentiation operations to simple products in the frequency domain (which can be obtained easily by means of the FFT), fast and accurate numerical methods can be developed to treat a variety of initial and/or boundary value problems for the mathematical modeling of mechanical behavior in solids, fluids and their interactions. However, widespread use for PDEs has been hindered in no small part by the well-known difficulties of Fourier analysis in handling complex physical boundary conditions, complicated geometries, non-uniformly spaced data, and, of course, non-periodicity. In the spirit of addressing such challenges and facilitating broader applicability, this talk additionally discusses recent advances in a novel FFT-based (pseudo)spectral framework for solving time-dependent equations on general domains and boundaries. The ultimate goal is to build high-performance solvers that can provide very efficient, stable and physically-faithful resolution of the underlying (continuous) mechanical dynamics. With an eye towards mutual validation of both simulation and experiment, the efficacy of these new tools are demonstrated through some of the collaborative scientific problems that have inspired them, including those in materials science (ultrasonic non-destructive testing), cardiovascular medicine (pulsatile blood flow) and geophysics (seismogenic tsunamis).
12h30 | Déjeuner
14h | Ateliers
Matthieu Vitse, LMPS, matthieu.vitse@ens-paris-saclay.fr
15h30 | Pause café
16h | Activité théatrale participative autour du thème de l'audition de recrutement
18h30 | Fin de la première journée
19h30 | Cocktail Dînatoire et soirée au point ephémère sur le canal Saint Martin !!
-> Projection des slides de chaque participants
-> 200 Quai de Valmy, 75010 Paris
-> accès toute la soirée aux évenements du lieu (bar, DJ...)
VENDREDI 31/03/23
Clément Benard, Safran Tech, clement.benard@safrangroup.com
Jeremy Bleyer, laboratoire NAVIER, jeremy.bleyer@enpc.fr
10h30 | Plénière #3
On the multi-physics analysis for offshore wind energy
Matteo Capaldo, TotalEnergies, matteo.capaldo@totalenergies.com
Offshore wind structural design is a challenging field because of the complex interactions between the various physical phenomena involved. Moreover, the description of the system in its environment involves a large set of aleatoric and epistemic uncertainties.
Models need to be fast to repeat the simulations for many different conditions and reduce aleatoric uncertainties, but on the other hand, they need to be accurate to reduce epistemic uncertainties.
Multi-physics and multi-fidelity models are crucial for accurately predicting the behavior of wind turbines under extreme weather conditions, such as strong winds and waves, to evaluate fatigue life-time and properly estimate energy production.
This presentation will give an overview of the challenges, the existing solutions and the future of the offshore wind structural design.
11h30 | Plénière #4
Chalenges mécaniques liés à l'électrification des motorisations et autres actionneurs
Hervé Mahé, VALEO, herve.mahe@valeo.com
Abstract à venir...
12h30 | Déjeuner
14h | Table ronde
Une démarche de recherche eco-responsable : oui mais comment ??
Nicolas Perry (Arts et Métiers)
Matteo Capaldo (Total Energies)
Maxence Rojo (UPS+AllCAN)
Rémi BOUZEL (Qarnot)
16h | Conclusion et fin du workshop