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The northern territories of Eastern Siberia are characterized by a permafrost-taiga
structure of the surface layer of soil, which reduces the efficiency of geological exploration
using seismic sources of explosive and vibratory types. Therefore, Geotech Holding Company
developed a special eco-friendly electromagnetic pulse source "Yenisei", which seismic
waves are the subject of analysis using high-performance computing in this paper.
Computational technology, worked out previously for solving the problems of the dynamics
of viscoelastic, elastic-plastic, granular and porous media, is applied to the analysis of wave
motion of a soil near a point of perturbations. It is shown that the main frequency of generated
strain waves substantially depends on the elastic characteristics of a soil in the near-surface
zone. A comparison of the results of computations obtained in the framework of the model of
static loading with instant unloading and the model taking into account the monotone loading
stage with subsequent pressure relief showed the validity of the hypothesis about the presence
of added mass of a soil under the loading platform. This mass accumulates impact energy and
emits seismic waves due to oscillatory motion.
Keywords: blocky-layered geomedium, electromagnetic pulse source, seismic oscillations, elastic waves, parallel computational algorithm, supercomputer modeling |
full paper (pdf, 2496 Kb)