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Validation des calculs de propagation d'ondes: approches par éléments finis et éléments de frontière
This paper presents several aspects of the validation of wave propagation computations. The numerical modelling of wave propagation is discussed through two different approaches: the finite element method and the boundary element method. Wave propagation involves specific phenomena such as damping and dispersion. For computations of wave propagation by the finite element method, similar properties, artificial and purely numerical, arise: numerical dispersion and numerical damping. The influence of the mesh refinement on wave propagation computations (1D and 2D) is discussed and quantified for different finite element types (triangular, quadrilateral, higher order). The numerical modelling of damping is also investigated (Rayleigh damping). For the boundary element method, two validation examples are presented: the first one is related to an exact analytical solution, the second one to seismic in situ experiments.
Validation des calculs de propagation d'ondes: approches par éléments finis et éléments de frontière
This paper presents several aspects of the validation of wave propagation computations. The numerical modelling of wave propagation is discussed through two different approaches: the finite element method and the boundary element method. Wave propagation involves specific phenomena such as damping and dispersion. For computations of wave propagation by the finite element method, similar properties, artificial and purely numerical, arise: numerical dispersion and numerical damping. The influence of the mesh refinement on wave propagation computations (1D and 2D) is discussed and quantified for different finite element types (triangular, quadrilateral, higher order). The numerical modelling of damping is also investigated (Rayleigh damping). For the boundary element method, two validation examples are presented: the first one is related to an exact analytical solution, the second one to seismic in situ experiments.
Validation des calculs de propagation d'ondes: approches par éléments finis et éléments de frontière
Semblat, Jean-François (author)
Revue Française de Génie Civil ; 3 ; 565-575
1999-01-01
11 pages
Article (Journal)
Electronic Resource
Unknown
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