Identification of some statistical parameters of a random heterogeneous medium using measurements of the surface wavefield

Shahram Khazaie (1) , R. Cottereau (1) , D. Clouteau (1)

1 MSSMat - Laboratoire de mécanique des sols, structures et matériaux

This presentation discusses the identification of some statistical properties of an elastic random medium based on surface measurements. The influence of two fundamental factors in the diffusion regime, i.e. the ratio between the dominant wavelength and the correlation length of the heterogeneities, and the ratio between P and S wave speeds is studied. The influence of the correlation model is also assessed. The global diffusion time of the medium is then used as a key parameter to identify the correlation length of the random medium.

Mots clés: Identification; Random medium; Correlation length; Diffusion regime

Domaines: Analyse numérique [math.NA]; Mécanique [physics]; Sciences de l'ingénieur [physics]

Shahram Khazaie, R. Cottereau, D. Clouteau. Identification of some statistical parameters of a random heterogeneous medium using measurements of the surface wavefield. 2nd ECCOMAS Young Investigators Conference (YIC 2013), Sep 2013, Bordeaux, France. ⟨hal-00855856⟩