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NONLINEAR WAVES PROPAGATION IN EARTH’S CRUST AS PRESTRESSED CHAINS OF BLOCKS
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Monitoring 2019, Nov 2019, Volume 2019, p.1 - 5
Abstract
Summary
We propose a new concept in the approach to the seismic process study. And the new seismic theory will improve potentialities of monitoring and modelling of natural hazards and new technologies for risk minimization and prevention. This work is a continuation of the seismic waves propagation study caused by irregularity of lithospheric stress as a result of plates structure. The given research as the numerical modelling of the chain of grains dynamics was performed to study the possibility of nonlinear soliton waves propagation in lithosphere. We take the Earth’s crust for a structured block media consisting of separate blocks and when modelling these are shaped like cubes with close sizes. It is important for understanding of Earth’s plates tectonic mechanisms, stress growth and localization, seismic manifestations of the stresses release in the form of earthquakes. From the point of view of such a model we studied the tectonic process such as subduction. We have shown that a feature of the evolution of the stress-strain state of block models is the formation of chains of stressed blocks that permeate the model. Studies have shown the finite-element model of nonlinear wave propagation in chains blocks of an arbitrary form interacting at contact.
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