Analysis of elastic waves generated in frozen grounds by means of the electromagnetic pulse source "Yenisei"

5th All-Russian Conference with International Participation POLAR MECHANICS

地球科学;力学

Sadovskii, V.M.^1,2 ; Sadovskaya, O.V.^1,2 ; Detkov, V.A.^1,2

Institute of Computational Modeling, SB RAS, Akademgorodok 50/44, Krasnoyarsk, Russia^1

LLC Evenkiyageofizika, Leningradskaya 66, Krasnoyarsk, Russia^2

关键词: Cluster architecture;    Computational experiment;    Computational technology;    Mechanical characteristics;    Multiprocessor computing systems;    Simplified mathematical model;    Spatial variables;    Synthetic seismogram;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/193/1/012058/pdf
DOI  :  10.1088/1755-1315/193/1/012058

学科分类：力学，机械学

来源: IOP

【 摘 要 】

Computational technology for multiprocessor computing systems of cluster architecture is developed, the ultimate goal of which is numerical modeling of wave fields generated by the electromagnetic pulse source "Yenisei" in blocky-layered geomedia. To describe the wave processes, mathematical models of the dynamics of elastic and elastic-plastic media, of porous and granular materials are applied. The algorithms of numerical realization are constructed based on the method of two-cyclic splitting with respect to spatial variables. Computational experiments showed that the proposed technology allows reproducing the system of waves near the region of excitation of seismic oscillations in 3D setting with a high degree of details and accuracy. The results of computations can be used in working out the optimal modes of functioning the source "Yenisei", when mechanical characteristics of the layers vary in a wide range from solid and frozen grounds with inclusions of rock till granular and clayey water-saturated grounds. Numerical analysis makes also possible to obtain the averaged data, necessary for the adequate simulation of the localized pulse action from the source, using simplified mathematical models for calculating the synthetic seismograms of reflected waves over large scale and at great depth of layers bedding in complex geomedia.