Numerical Simulation of the Dynamics of an Elastic Blocky Medium with Thin Interlayers

A spatial model of an elastic blocky medium with thin interlayers is considered. Thin interlayers are presented as internal boundary conditions for the blocks. Using the solution for plane monochromatic waves in a medium with an elastic layer, it is shown that the proposed interlayer model is quite suitable for describing media with sufficiently thin and compliant layers. An algorithm based on the splitting method is developed for solving spatial problems in media with parallelepiped-shaped blocks. One-dimensional splitting problems are solved using a scheme with controllable artificial dissipation. A blockн half-space with a large elastic inclusion is considered. A pulse generated on the free surface is reflected from the inclusion and returns back to the surface. The parameters of the blocky medium affect the quality of the reflected signal. If the layers are thick and compliant, the waves are scattered, and the reflected signal cannot be detected.

Keywords

blocky media; thin interlayers.

References

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