A new numerical simulation algorittan is presented for the elastic wave propagation in hetero-geneous anisotropic media.We make discretization of the computational domain by using triangular and qua-drangular grids.The scheme is based on integral equilibrium at each node to simulate the elastic wave propa-gation in heterogeneous anisotropic media.The scheme is very flexible in dealing with arbitrary surface to-pography,inner openings,hqnid-solid boundaries and irregular interfaces.Moreover,the free-surface condi-tion of complex geometrical boundaries can be,satisfied naturally.This work is an extension of the grid meth-od for the elastic wave propagation in heterogeneous isotropic media,and a quadrangular grid with low com-putational cost is also introduced.
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