Vol. 6, №1, 2014

CONTINUUM PHYSICS

ANALYSIS OF RESONANT EXCITATION OF BLOCK MEDIUM BASED ON EQUATIONS OF THE COSSERAT MOMENTARY CONTINUUM
Sadovskii V.M.
Institute of Computational Modelling SB RAS
660036 Krasnoyarsk, Russian Federation
sadov@icm.krasn.ru
Sadovskaya O.V.
Institute of Computational Modelling SB RAS
660036 Krasnoyarsk, Russian Federation
Varygina M.P.
Institute of Computational Modelling SB RAS
660036 Krasnoyarsk, Russian Federation

Received 08.04.2013
Represented by a Academician of RANS V.I. Erofeev 08.04.2013
In the framework of mathematical model of a block medium with elastic blocks interacting through compliant viscoelastic interlayers and its approximation on the basis of equations of the Cosserat continuum, the problems of periodic perturbation of a layer and of a half-space under the action of distributed and localized surface loads are solved numerically. Parallel algorithms for multiprocessor computer systems of cluster type and for systems with graphics accelerators are applied. The simple formulas are suggested to determine the elasticity coefficients of the moment continuum by given characteristics of the materials of blocks and interlayers, which provide a good correspondence of the wave fields received by means of the exact and approximate models. By the analysis of numerical solutions it is shown that a multiblock medium possesses a resonant frequency of rotational motion of blocks, which does not depend on the size of a massif and on the boundary conditions at its surface, and is, therefore, the phenomenological parameter of a material.

Keywords: block medium, Cosserat continuum, dynamics, viscoelasticity, rotational motion, resonance frequency, parallel program system.

UDC 539.3

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RENSIT, 2013, 5(1):111-118

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