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Abstract

Summary

The report contains formulation of the problem and experimental modelling results on propagation of nonlinear pulses in Earth's lithosphere. We consider the lithosphere from the point of view of the dynamics of model structured media. In One-dimensional representation we use for this purpose the chain of steel balls with the same diameter of 41.25 mm. The wave-pulse perturbation in the model is generated by the different speeds impact of one steel ball on the rest of the chain of balls. The Strike ball is mounted on the pendulum mechanism console and the impact force depends on the angle of deflection of the pendulum. It is known that during the propagation of such a shock pulse along chain it is transformed into a soliton-like pulse (compacton) after 4 elements of the model. We assume that such nonlinear solitary waves can be generated directly in the earthquake sources. Then they are transformed into seismic waves, spreading from the epicenter. The goal of the research is to test the hypothesis of the transformation of this nonlinear solitary wave into a seismic wave in cases of using in the structured lithosphere modeling more realistic medium models as opposed to the ideal chains of spherical granules. For this purpose, part of the chain is filled up with sand to simulate a medium that absorbs part of the nonlinear perturbation energy in the chain of granules. The use of special piezoelectric sensors and a dual-channel oscilloscope TDS-210 allowed us to study the spread of nonlinear wave in the model. We have made a parallel physical experiment and numerical modeling for verification of results.

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/content/papers/10.3997/2214-4609.201902155
2019-05-15
2024-04-29

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References

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201902155
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Modelling of nonlinear waves propagation in the block structured Earth's lithosphere
Conference Proceedings 2019, 1 (2019); https://doi.org/10.3997/2214-4609.201902155
/content/papers/10.3997/2214-4609.201902155
/content/papers/10.3997/2214-4609.201902155
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