Mathematical simulation of invariant seismic experiments for research into requirements of equivalence conditions of sounding signals

Modern technology of seismic survey is based on assumptions about the use of sounding signals distinguished by their characteristics. Thus, the experimentally obtained seismograms have a different form, which appears to be an objective hindrance when comparing and interpreting the obtained seismograms. An invariant seismic experiment is understood as seismic...

efimov.pdf3.02 MB

The nonlinear wave effects in vibroseismics

The process of radiation of seismic wave fields generated by powerful seismic vibrators is accompanied by a number of physical phenomena taking place in the vicinity of a source and having continuation at significant distances from it. The present paper is dealt with the analysis of these phenomena and the...

hayretdinov.pdf4.95 MB

Modeling of Stoneley wave generated by seismic vibrators

The paper deals with mathematical problems of physical phenomena, connected with generation, long-distance propagation, and interaction of the acoustic and the seismic waves from powerful vibrational sources operating on the interface of the elastic Earth-atmosphere. Three problems of mathematical modeling are considered: modeling of acoustic waves radiation of a vibrational...

kovalevskiy.pdf4.59 MB

On a phase method of vibroseismic exploration

The possibilities of obtaining numerical estimations of the time of wave propagation and parameters to describe the form of recorded wave impulses, with the use of a sequence of sessions of the monochromatic radiation on various frequencies are investigated. The monochromatic signals are invariant in their form when propagating in...

pushnoy.pdf5.73 MB

Method of filtration of vibroseismic signals

The method of filtration of monochromatic vibroseismic signals is offered. The proposed method is based on the application of the operation resulting in the compression of a frequency characteristic of the passband filter with the centre of compression assigned to a basic signal. The coefficient of compression of the frequency...

shorohov.pdf1.69 MB

Spectral inversion method of wave equations

The statements of inverse problems of two types are considered within the framework of the scalar wave equation. The inverse problems include the reconstruction of sources of the wave field (the right-hand side of the equation) and the determination of the unknown coefficient (wave velocity). In spite of some difference...

cibulchik.pdf4.61 MB