Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Chiavassa, Guillaume"'
Propagation of elastic waves in damaged media (concrete, rocks) is studied theoretically and numerically. Such materials exhibit a nonlinear behavior, with long-time softening and recovery processes (slow dynamics). A constitutive model combining Mur
Externí odkaz:
http://arxiv.org/abs/1903.02229
Publikováno v:
Journal of Computational Physics 275 (2014) 118-142
A time-domain numerical modeling of transversely isotropic Biot poroelastic waves is proposed in two dimensions. The viscous dissipation occurring in the pores is described using the dynamic permeability model developed by Johnson-Koplik-Dashen (JKD)
Externí odkaz:
http://arxiv.org/abs/1504.00196
Publikováno v:
Journal of the Acoustical Society of America 134-6 (2013) 4610-4623
An explicit finite-difference scheme is presented for solving the two-dimensional Biot equations of poroelasticity across the full range of frequencies. The key difficulty is to discretize the Johnson-Koplik-Dashen (JKD) model which describes the vis
Externí odkaz:
http://arxiv.org/abs/1210.0365
Publikováno v:
Journal of Computational Physics 237 (2013) 1-20
A time-domain numerical modeling of Biot poroelastic waves is presented. The viscous dissipation occurring in the pores is described using the dynamic permeability model developed by Johnson-Koplik-Dashen (JKD). Some of the coefficients in the Biot-J
Externí odkaz:
http://arxiv.org/abs/1207.0292
Publikováno v:
Wave Motion 49-7 (2012) 667-680
Wave propagation in a stratified fluid / porous medium is studied here using analytical and numerical methods. The semi-analytical method is based on an exact stiffness matrix method coupled with a matrix conditioning procedure, preventing the occurr
Externí odkaz:
http://arxiv.org/abs/1202.1942
Autor:
Chiavassa, Guillaume, Lombard, Bruno
Publikováno v:
Communications in Computational Physics 13, 4 (2013) 985-1012
Numerical methods are developed to simulate the wave propagation in heterogeneous 2D fluid / poroelastic media. Wave propagation is described by the usual acoustics equations (in the fluid medium) and by the low-frequency Biot's equations (in the por
Externí odkaz:
http://arxiv.org/abs/1109.3281
Autor:
Chiavassa, Guillaume, Lombard, Bruno
Publikováno v:
Journal of Computational Physics 230 (2011) 5288-5309
This paper deals with the numerical modeling of wave propagation in porous media described by Biot's theory. The viscous efforts between the fluid and the elastic skeleton are assumed to be a linear function of the relative velocity, which is valid i
Externí odkaz:
http://arxiv.org/abs/1012.3315
Publikováno v:
Journal of Computational and Applied Mathematics 234 (2010) 1757-1765
Propagation of transient mechanical waves in porous media is numerically investigated in 1D. The framework is the linear Biot's model with frequency-independant coefficients. The coexistence of a propagating fast wave and a diffusive slow wave makes
Externí odkaz:
http://arxiv.org/abs/0711.4942
Publikováno v:
In International Journal of Solids and Structures 1 June 2018 141-142:35-44
Publikováno v:
In Wave Motion November 2017 74:35-55