Finite-element modelling of elastic wave propagation and scattering within heterogeneous media.

ABSTRACT: The scattering treated here arises when elastic waves propagate within a heterogeneous medium defined by random spatial fluctuation of its elastic properties. Whereas classical analytical studies are based on lower-order scattering assumptions, numerical methods conversely present no such limitations by inherently incorporating multiple scattering. Until now, studies have typically been limited to two or one dimension, however, owing to computational constraints. This article seizes recent advances to realize a finite-element formulation that solves the three-dimensional elastodynamic scattering problem. The developed methodology enables the fundamental behaviour of scattering in terms of attenuation and dispersion to be studied. In particular, the example of elastic waves propagating with

SUBMITTER: Van Pamel A 

PROVIDER: S-EPMC5312134 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature