 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 11262 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8011
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| In English (Mech. Solids): | | 3251 |
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| N.I. Aleksandrova, "Model of Block Media Taking into Account Internal Friction," Mech. Solids. 57 (3), 496-507 (2022) |
| Year |
2022 |
Volume |
57 |
Number |
3 |
Pages |
496-507 |
| DOI |
10.3103/S0025654422030025 |
| Title |
Model of Block Media Taking into Account Internal Friction |
| Author(s) |
N.I. Aleksandrova (Chinakal Institute of Mining of the Siberian Branch of the RAS, Novosibirsk, 630091 Russia, nialex@misd.ru) |
| Abstract |
The block medium is modeled by a discrete-periodic spatial lattice of masses connected by elastic springs and viscous dampers. To describe the viscoelastic behavior of the interblock layers, a rheological model of internal friction with two Maxwell elements and one Voigt element with the quality factor of the material as the determining parameter is proposed. Numerical experiments show that, within the framework of this interlayer model, it is possible to select the viscosity and stiffness of the Maxwell and Voigt elements so that the quality factor of the material differs from the given constant value by no more than 5%. In the one-dimensional case, within the framework of the proposed model, the influence of the quality factor on the dispersion properties of a block medium is studied and it is shown that the greatest effect of the quality factor on the dispersion is observed in the low-frequency part of the spectrum. In the three-dimensional case, within the framework of the proposed model, some geomechanical problems are numerically studied for a block half-space under the action of a surface concentrated vertical load. Namely, the attenuation of the velocity amplitudes of surface blocks was studied depending on the Q-factor under step action and under the action of a Gaussian pulse. In addition, we study a layer on the surface of a half-space under the action of a concentrated vertical impulse load in the case when both the layer and the half-space are block media but have different properties. |
| Keywords |
internal friction, block medium, Lamb problem, half-space, layer on half-space, wave motion, numerical simulation |
| Received |
08 June 2021 | Revised |
07 August 2021 | Accepted |
26 August 2021 |
| Link to Fulltext |
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