Abstract

 

Influencing of Effects of Sounding Nonlinearity on Characteristics of a Wave Field of the Power Vibrator

M.S.Khairetdinov, R.V.Rodugin (Institute of Computational Mathematics and Mathematical Geophysics, SB RAS, Novosibirsk, Russia)

e-mail: marat@opg.sscc.ru

Analysis of effects of physical nonlinearity in the field of a seismic sourņes and their influencing on an painting of spatially - temporal structure wave fields in a long-range zone introduce major problem for modern seismology. Major perspectives for investigation here introduces a vibroseismic method of sounding of the Earth with the help of regular seismic oscillations, generated with the help of power vibrational sources. Such sources are mounted on a daylight area of the Earth and raise in medium monochromatic oscillations or oscillations of increasing frequency in a given band.. In case of failure of a requirement of a continuity of the vibrator from underlying medium he passes in free flying, that is a reason of origin of nonlinear effects calling occurrence of harmonics in amplitude of ground motion. In view of this effect in the report the relations of characteristics of vibrator wave fields in the nearest and long-range zones on the basic and multiple frequencies in conditions of sounding of signals with a linear frequency modulation and monochromatic signals are analyzed.

 

Section : 6