Abstract
A model of a continuum with a structure described by infinite order equations of motion is proposed. In case that a wave is very long as compared with the size of the structure, equations are reduced to the fourth-order equations. A closed equation of motion, including nonlinear, dispersed and wave members, is derived. It is shown that solutions in the form of soliton waves exist only in media where wave velocity grows with pressure. In the media, where soliton waves do not exist, quasi-stationary solutions with multiple frequencies prevail. It is found that the nonlinear effect of multiple frequencies is unexpectedly high even for small deformation as dispersion violently intensifies nonlinear events. Moreover, in the domain of small deformation, there exist solutions for longitudinal and transversal waves with the same length and different frequencies. The solutions for the same length waves with different frequencies most often occur in seismology and seismic explorations.
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Original Russian Text © B.P. Sibiryakov, E.B. Sibiryakov, 2016, published in Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, 2016, No. 6, pp. 49–59.
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Sibiryakov, B.P., Sibiryakov, E.B. Intensification of nonlinearity by dispersed events in media with structure and generation of various dominant frequencies in P- and S-waves. J Min Sci 52, 1090–1099 (2016). https://doi.org/10.1134/S1062739116061625
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DOI: https://doi.org/10.1134/S1062739116061625