P097 EFFECTIVE MODELS OF MEDIA CONSISTING OF ALTERNATING POROUS AND ELASTIC LAYERS L.MOLOTKOV St.Petersburg Branch of Steklov Mathematical Institute Fontanka 27 191011 St.Petersburg Russia 1 Summary. For the medium consisting of alternating porous and elastic layers with slide contact on boundaries the effective model is established. This model is four-phase one and four waves propagate in it. In the case when thickness of elastic layers is very small the effective model is a partial case of the transversely isotropic Biot model. The investigations of wave propagation in porous and fractured media are fulfilled on the basis of the effective models.


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