NUMERICAL SIMULATION OF SEISMIC WAVE PROPAGATION NEAR A FLUID-SOLID INTERFACE

Pranowo, . and Laksono, Yoyok Adi and Suryanto, Wiwit and Brotopuspito, Kirbani NUMERICAL SIMULATION OF SEISMIC WAVE PROPAGATION NEAR A FLUID-SOLID INTERFACE. In: The 2 International Conference on Earthquake Engineering and Disaster Mitigation (ICEEDM-II 2011), 19 - 20 July 2011, Shangri-La Hotel, Surabaya, Indonesia.

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Abstract

We introduce a high-order discontinuous galerkin method for modeling wave propagation in complex media with both uid (acoustic) and solid (elastic) medium, as for instance in offshore seismic experiments. The problem is formulated in terms of velocity-stress in both media. A nodal high order discontinuous galerkin finite element is used for the spatial discretization while an explicit low storage fourth order Runge Kutta scheme is used to march in the time domain. The numerical scheme provides stable and accurate methods for simulating seismic wave across a fluid – solid interface, the comparisons with finite element method and analytical solutions show a good agreement.

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