Abstract
In the recent years the Arctic onshore and offshore areas has become the region of interest. In the cold conditions, inhomogeneous permafrost ground with ice and methane inclusions is formed. It affects all conducted full-scale seismic measurements. The aim of this work is creation of the computational settings for reproduction of such wave processes that is able to encompass the main features of the region. Two approaches to numerical modeling are introduced and compared on the obtained wave patterns and seismograms. The first one suggests the construction of multiple curvilinear grids. For the second one, a single rectangle grid is created with different elastic parameters in each cell. Linear elasticity model is used as a governing system of equations. It was solved using the grid-characteristic method on structured grids. As a result of the analysis, the advantages and disadvantages of the approaches are distinguished. The influence of the domains on the wave profiles is studied, reproduced rich wave phenomena is defined.
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Funding
This work was carried out with the financial support of the Russian Science Foundation, project no. 21-71-10015.
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Guseva, E.K., Golubev, V.I. & Petrov, I.B. Investigation of Wave Phenomena During the Seismic Survey in the Permafrost Areas Using Two Approaches to Numerical Modeling. Lobachevskii J Math 45, 231–238 (2024). https://doi.org/10.1134/S1995080224010190
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DOI: https://doi.org/10.1134/S1995080224010190