Fast Boundary Element Methods for fault mechanics and earthquake control

Autor: Laura Bagur, Stéphanie Chaillat, Jean-François Semblat, Ioannis Stefanou, Pierre Romanet

Earthquakes due to either natural or anthropogenic sources cause important human and material damage. In both cases, the presence of pore fluid influence the triggering of seismic instabilities. Preliminary results, done in the context of the Europea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dc26c0a692ee878ce1071ec366b19830
https://doi.org/10.5194/egusphere-egu23-14727

A fast boundary element method using the Z‐transform and high‐frequency approximations for large‐scale three‐dimensional transient wave problems

Autor: Bruno Leblé, Stéphanie Chaillat, Marc Bonnet, Damien Mavaleix‐Marchessoux

Publikováno v: International Journal for Numerical Methods in Engineering. 121:4734-4767

3D rapid transient acoustic problems are difficult to solve numerically when dealing with large geometries, because numerical methods based on geometry discretisation (mesh), such as the boundary element method (BEM) or the finite element method (FEM

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c2ea699d11a3476e8b7a1b142f886fed
https://doi.org/10.1002/nme.6488

Improvement of hierarchical matrices for 3D elastodynamic problems with a complex wavenumber

Autor: Laura Bagur, Stéphanie Chaillat, Patrick Ciarlet

Publikováno v: Advances in Computational Mathematics
Advances in Computational Mathematics, 2022, 48 (9), ⟨10.1007/s10444-021-09921-3⟩

International audience; It is well known in the literature that standard hierarchical matrix (H-matrix) based methods, although very efficient for asymptotically smooth kernels, are not optimal for oscillatory kernels. In a previous paper, we have sh

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2b7f85a530fd42dbfdc22776c3ccbcc
https://hal.archives-ouvertes.fr/hal-03367755

Efficient evaluation of three-dimensional Helmholtz Green's functions tailored to arbitrary rigid geometries for flow noise simulations

Autor: Stéphanie Chaillat, Benjamin Cotté, Jean-François Mercier, Gilles Serre, Nicolas Trafny

Publikováno v: Journal of Computational Physics
Journal of Computational Physics, 2022, 452, ⟨10.1016/j.jcp.2021.110915⟩

International audience; The Lighthill's wave equation provides an accurate characterization of the hydrodynamic noise due to the interaction between a turbulent flow and an obstacle, that is needed to get in many industrial applications. In the prese

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fcf127585bc4a4ae38b78184ce8c70c
https://doi.org/10.1016/j.jcp.2021.110915

An efficient preconditioner for adaptive Fast Multipole accelerated Boundary Element Methods to model time-harmonic 3D wave propagation

Autor: Faisal Amlani, Stéphanie Chaillat, Adrien Loseille

Publikováno v: Computer Methods in Applied Mechanics and Engineering
Computer Methods in Applied Mechanics and Engineering, 2019, 352 (1), pp.189-210. ⟨10.1016/j.cma.2019.04.026⟩
Computer Methods in Applied Mechanics and Engineering, Elsevier, 2019, 352 (1), pp.189-210. ⟨10.1016/j.cma.2019.04.026⟩

This paper presents an efficient algebraic preconditioner to speed up the convergence of Fast Multipole accelerated Boundary Element Methods (FM-BEMs) in the context of time-harmonic 3D wave propagation problems and in particular the case of highly n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7096887f7610747d99a2c0728e18a112
https://hal.science/hal-02113702/document