Abstract : We are interested in the modeling of wave propagation in an infinite bilayered acoustic/poroelastic media. We consider the biphasic Biot's model in the poroelastic layer. This first part is devoted to the calculation of analytical solution in two dimensions, thanks to Cagniard de Hoop method. The solution is validated through comparison with solutions obtained by a numerical code. In the second part we'll consider the 3D case.
