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)
 
M. Bonnet, S. Chaillat, A. Nassor
Solvability results for the transient acoustic scattering by an elastic obstacle (Soumis)
 images/icons/doctype_pdf.gif
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