A5082949834- Railway Engineering and Dynamics
- Advanced Mathematical Modeling in Engineering
- Advanced Numerical Methods in Computational Mathematics
- Ultrasonics and Acoustic Wave Propagation
- Structural Health Monitoring Techniques
- Probabilistic and Robust Engineering Design
- Geotechnical Engineering and Underground Structures
- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Composite Material Mechanics
- Seismic Performance and Analysis
- Geophysical Methods and Applications
- Numerical methods in engineering
- Electromagnetic Simulation and Numerical Methods
- Geotechnical Engineering and Soil Mechanics
- earthquake and tectonic studies
- Random lasers and scattering media
- Underwater Acoustics Research
- Numerical methods in inverse problems
- Microwave Imaging and Scattering Analysis
- Soil Geostatistics and Mapping
- Dam Engineering and Safety
- Electromagnetic Scattering and Analysis
- Model Reduction and Neural Networks
- Geotechnical and Geomechanical Engineering
Laboratoire de Mécanique et d’Acoustique
2019-2025
Centre National de la Recherche Scientifique
2014-2024
Aix-Marseille Université
2021-2024
Centrale Marseille
2019-2024
Château Gombert
2022-2024
Laboratoire de Mécanique des Sols, Structures et Matériaux
2011-2021
CentraleSupélec
2005-2021
Université Paris-Saclay
2016-2019
École Centrale Paris
2006-2017
Universitat Politècnica de Catalunya
2009-2011
In this paper, we present SEM3D: a 3D high-fidelity numerical earthquake simulator that is tailored to predict the seismic wave field of complex scenarios from fault epicenter site. SEM3D solves wave-propagation problem by means spectral element method (SEM). The presented demonstrative test case was blind MW6.0 scenario at European experimental site located in sedimentary basin Argostoli on island Kefalonia (Western Greece). A well-constrained geological model, obtained via geophysical...
The class of stochastic non-gaussian positive-definite fields with minimal parameterization proposed by Soize (Soize, 2006) to model the elasticity tensor field a random anisotropic material shows an anisotropy index which grows fluctuation level. This property is in contradiction experimental results geophysics where remains limited whatever Hence, main purpose this paper generalize Soize's order account independently for and It then shown that new leads major differences wave propagation regimes.
Summary The objective of studies presented in this paper is to analyse the spatial incoherency seismic ground motions using signals from a velocimeter dense array located on rock site, recording aftershock sequence two M6 Kefalonia earthquakes that occurred January/February 2014 (Kefalonia island, Greece). analyses are carried out with both horizontal and vertical components velocigrams for small separation distances stations (<100 m). coherencies identified strong motion windows compared...
Research Article| January 24, 2018 Accelerometer, Velocimeter Dense‐Array, and Rotation Sensor Datasets from the Sinaps@ Postseismic Survey (Cephalonia 2014–2015 Aftershock Sequence) Vincent Perron; Perron aFrench Alternative Energies Atomic Energy Commission (CEA), DEN, CEA Cadarache, DPIE/SA2S, Bât. 352, F‐13108 Saint‐Paul‐lez‐Durance, France, vincent.perron.mail@gmail.comkAlso at Université Grenoble Alpes, ISTerre, CNRS, IRD, IFSTTAR, F‐38041 Grenoble, France.lAlso Insitut de...
Abstract Simple formulas are derived for the dynamic stiffness of pile group foundations subjected to horizontal and rocking loads. The formulations based on construction a general model impedance matrices as condensation mass, damping, stiffness, identification values these an extensive database numerical experiments computed using coupled finite element–boundary element models. obtained can be readily used design both floating piles homogeneous half‐space end‐bearing applicable wide range...
SUMMARY This paper presents a numerical strategy that allows to lower the costs associated prediction of value homogenized tensors in elliptic problems. is performed by solving coupled problem, which complex microstructure confined small region and surrounded tentative medium. The characteristics this medium are updated using self‐consistent approach shown converge actual solution. main feature coupling it really couples random with deterministic model, not one (deterministic) realization...
This paper describes the construction of a stochastic model urban railway track geometry irregularities, based on experimental data. The considered irregularities are gauge, superelevation, horizontal and vertical curvatures. They modelled as random fields whose statistical properties extracted from large set on-track measurements an network. About 300–1000 terms used in Karhunen–Loève/Polynomial Chaos expansions to represent with appropriate accuracy. is then validated by comparing contact...
Abstract In the linear seismic design of buildings, (deterministic) substructure method is a customary and efficient approach. However, existence spatial variability in parameters mechanical model soil, as well parametric errors, calls for use probabilistic approaches order to provide reliable structure. The construction models soil impedance matrix provides natural path such within context method. Two main techniques are described this paper: one, typically using stochastic finite element...
SUMMARY When applied to diffusion problems in a multi‐phase setup, the popular extended finite element method (XFEM) strategy suffers from an inaccurate representation of local fluxes vicinity interface. The XFEM enrichment improves global quality solution but it is not enforcing any feature fluxes. Thus, resulting numerical interface are realistic, particular when conductivity ratios between different phases very high. This paper introduces additional restriction formulation aiming at...
.This paper concerns the derivation of radiative transfer equations for acoustic waves propagating in a randomly fluctuating half-space weak-scattering regime, and study boundary effects through an asymptotic analysis Wigner transform wave solution. These allow one to model transport energy density, taking into account scattering by random heterogeneities. The approach builds on method images, where problem is extended full-space, with two symmetric sources even map mechanical properties....
Summary This paper proposes a new scheme for the generation of Gaussian random fields over large domains (domain size much larger than correlation length). The decomposes simulation domain into overlapping subdomains and essentially generates independent each them before merging on overlaps. It is naturally suited clusters computers. With this approach, number operations processor depends only local degrees freedom not total all processors. Hence, weak scalability perfectly met. describes...
In this paper the generation of random fields when domain is much larger than characteristic correlation length made using an adaptation Karhunen–Loève expansion (KLE). The KLE requires computation eigen-functions and eigen-values covariance operator for its modal representation. This step can be very expensive if length. To deal with issue, split in sub-domains where decomposition comfortably computed. coefficients are conditioned order to guarantee continuity field a proper representation...
In this paper, we describe a multiscale strategy that allows to couple stochastic and deterministic models. The transition condition enforced between the two models is weak, in sense it based on volume coupling space (rather than more classical boundary coupling) volume/sample average random dimension. paper then concentrates application of weak technique for development new iterative method homogenization media. microstructure tentative homogenized medium, parameters which are initially...