Page de Stéphanie Chaillat

Stéphanie
Chaillat 		Chercheur
Responsable projet COFFEE
Chargé de Recherche
H.D.R. depuis 2019
thèse soutenue en 2008

Page personnelle
ENSTA UMA
bureau 2.2.26
Tél : (0) 18 187 2083

Recherches

  • Méthodes numériques
    • Méthodes des équations intégrales et des éléments de frontière;
    • Méthode multipôle rapide;
    • Solveurs directs et itératifs; Préconditionnement;
    • Approximations de rang faible; SVD rapide;
    • H-matrices;
    • Problèmes inverses;
  • Mécanique
    • Acoustique en domaine fréquentiel;
    • Elastodynamique en domaine fréquentiel;
    • Viscoélasticité;
    • Propagation d'ondes;
  • Sismologie
    • Propagation d'ondes sismiques;
    • Effets de site (amplification des ondes sismiques dans les bassins sédimentaires);

Enseignements

  • 2015- : Méthode des Eléments de frontière, Ecole Doctorale Sciences, Ingénierie et Environnement, Université Paris Est.
  • 2015- : Résolution des problèmes de diffraction par équations intégrales II (D11-2), ENSTA, Palaiseau.
  • 2012- : Fonctions de variable complexe (MA205), ENSTA, Palaiseau
  • 2011- : Introduction à la discrétisation des équations aux dérivées partielles (MA103), ENSTA, Palaiseau

Articles (revue avec comité de lecture)

S. Chaillat, R. Cottereau, R. Sevilla
A high-order discontinuous Galerkin Method using a mixture of Gauss-Legendre and Gauss-Lobatto quadratures for optimal efficiency and complexity (Soumis)
 
D. Mavaleix-Marchessoux, M. Bonnet, S. Chaillat, B. Leblé
H-matrix accelerated BEM-FEM coupling for dynamic analysis of naval structures under pulsating potential flow motion (Soumis)
 
S. Chaillat, B. Cotté, J.-F. Mercier, G. Serre, N. Trafny
Efficient evaluation of three-dimensional Helmholtz Green's functions tailored to arbitrary rigid geometries for flow noise simulations (2022)
Journal of Computational Physics - vol. 452 images/icons/doctype_pdf.gif
L. Bagur, S. Chaillat, P. Ciarlet
Improvement of hierarchical matrices for 3D elastodynamic problems with a complex wavenumber (2022)
Advances in Computational Mathematics - vol. 48 
S. Chaillat, M. Darbas, F. Le Louër
Analytical preconditioners for Neumann elastodynamic Boundary Element Methods (2021)
SN Partial Differential Equations and Applications - vol. 2 
F. Kpadonou, S. Chaillat, P. Ciarlet
On the efficiency of nested GMRES preconditioners for 3D acoustic and elastodynamic H-matrix accelerated Boundary Element Methods (2020)
Computers and Mathematics with Applications - vol. 80 (pp 471-489 ) 
D. Mavaleix-Marchessoux, M. Bonnet, S. Chaillat, B. Leblé
A fast boundary element method using the Z-transform and high-frequency approximations for large-scale 3D transient wave problems (2020)
Int. J. Numer. Meth. Engng. - vol. 121 (pp 4734-4767 ) 
F. Ciardo, B. Lecampion, F. Fayard, S. Chaillat
A fast boundary element based solver for localized inelastic deformations (2020)
International Journal for Numerical Methods in Engineering - vol. 121 (pp 5696--5718 ) 
F. Amlani, S. Chaillat, A. Loseille
An efficient preconditioner for adaptive Fast Multipole accelerated Boundary Element Methods to model time-harmonic 3D wave propagation. (2019)
Computer Methods in Applied Mechanics and Engineering - vol. 352 (pp 189-210 ) 
S. Chaillat, S. Groth, A. Loseille
Metric-based anisotropic mesh adaptation for 3D acoustic boundary element methods (2018)
Journal of Computational Physics - vol. 372 (pp 473-499 ) 
S. Chaillat, M. Darbas, F. Le Louër
Fast iterative boundary element methods for high-frequency scattering problems in 3D elastodynamics (2017)
Journal of Computational Physics - vol. 341 (pp 429–446 ) 
S. Chaillat, L. Desiderio, P. Ciarlet
Theory and implementation of H-matrix based iterative and direct solvers for Helmholtz and elastodynamic oscillatory kernels (2017)
Journal of Computational Physics - vol. 351 (pp 165–186 ) 
K. Meza Fajardo, J.-F. Semblat, S. Chaillat, L. Lenti
Seismic Wave Amplification in 3D Alluvial Basins: 3D/1D Amplification Ratios from Fast Multipole BEM Simulations (2016)
Bulletin of the Seismological Society of America - Seismological Society of America - vol. 106 (3) (pp 1267-1281 ) 
S. Chaillat, F. Collino
A Wideband Fast Multipole Method for the Helmholtz Kernel: Theoretical Developments (2015)
Computers and Mathematics with Applications - vol. 70 (pp 660-678 ) images/icons/doctype_link.gif
S. Chaillat, M. Darbas, F. Le Louër
Approximate local Dirichlet-to-Neumann map for three-dimensional elastic waves (2015)
Computer Methods in Applied Mechanics and Engineering - vol. 297 (pp 62-83 ) 
S. Chaillat, M. Bonnet
A new Fast Multipole formulation for the elastodynamic half-space Green's tensor (2014)
J. Comput. Phys. - vol. 258 (pp 787-808 ) images/icons/doctype_pdf.gif
S. Chaillat, M. Bonnet
Recent Advances on the Fast Multipole Accelerated Boundary Element Method for 3D time-harmonic Elastodynamics (2013)
Wave Motion - vol. 50 (pp 1090-1104 ) images/icons/doctype_link.gifimages/icons/doctype_pdf.gif
S. Chaillat, J.-F. Semblat, M. Bonnet
A preconditioned 3-D multi-region fast multipole solver for seismic wave propagation in complex geometries. (2012)
Commun. Comput. Phys. - vol. 11(2) (pp 594-609 ) images/icons/doctype_pdf.gifimages/icons/doctype_link.gif
S. Chaillat, G. Biros
FaIMS: A fast algorithm for the inverse medium problem with multiple frequencies and multiple sources for the scalar Helmholtz equation (2012)
Journal of Computational Physics - vol. 231(12) (pp 4403-–4421 ) images/icons/doctype_pdf.gifimages/icons/doctype_link.gif
E. Grasso, S. Chaillat, M. Bonnet, J.-F. Semblat
Application of the multi-level time-harmonic fast multipole BEM to 3-D visco-elastodynamics (2012)
Engineering Analysis with Boundary Elements - vol. 36 (pp 744-758 ) images/icons/doctype_pdf.gifimages/icons/doctype_link.gif

Conférence internationale avec actes

F. Amlani, S. Chaillat, S. Groth, A. Loseille
3D metric-based anisotropic mesh adaptation for the fast multipole accelerated boundary element method in acoustics (2017)
 

Conférences sans actes

A.-S. Bonnet-BenDhia, S. Chaillat, S. Fliss, Y. Tjandrawidjaja
Coupling BEMs in overlapping domains when a global Green’s function is not available (2018)
IABEM 2018, Paris 
E. Grasso, S. Chaillat, J.-F. Semblat, M. Bonnet
Méthode multipôle rapide multi-niveaux en visco-élastodynamique 3D (2011)
10e colloque national en calcul des structures images/icons/doctype_link.gif
S. Chaillat, G. Biros
Algorithme rapide et adaptatif pour le problème inverse de milieu en élastodynamique 3-D, avec fréquences et sources multiples (2011)
10e colloque national en calcul des structures images/icons/doctype_link.gif

H.D.R.

S. Chaillat
Contributions to the modelling of acoustic and elastic wave propagation in large-scale domains with boundary element methods (2019)
 

Rapport de recherche

S. Chaillat, F. Collino
A Wideband Fast Multipole Method for the Helmholtz kernel: Theoretical developments (2015)
 

Exposés en ligne

S. Chaillat
Virtual Seminar Series: Waves in Complex Continua (Wavinar) (2020)
 
S. Chaillat
Waves seminar at UC Merced (2020)
Recent advances on the preconditioning of 3D fast Boundary Element Solvers for 3D acoustics and elastodynamics