Analysis and Assessment of Seismic Hazard for the Azov-Black Sea Recreation Area

One of the geological structures accountable for the implementation of seismic potential of the region is the largest vertical faults in the Earth’s interior, where earthquake foci are usually located. This article is aimed at developing a better method for calculation of stresses and strains that occur in such seismogenic areas. According to the results of the analysis of data collected during the expeditionary work, the geophysical medium is modeled by a block structure in the form of a half-space with a cut rectangular parallelepiped, which is divided into five block elements. The state of material in the geological medium is described in each block by motion equations for a homogeneous, isotropic elastic medium in the Lamé form. Following the block element method, the algorithm of the differential factorization method is implemented in each block. Based on the numerical analysis results, the main trends in contact stresses and dynamics of displacement amplitudes were determined depending on the mechanical property values of the block material and the geometric parameters of the structure.

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To the study of the natural seismic tension of geological massifs

Вестник Чувашского государственного педагогического университета им. И.Я. Яковлева. Серия: Механика предельного состояния ◽

10.37972/chgpu.2020.46.4.009 ◽

2020 ◽

pp. 124-130

Author(s):

Марина Валерьевна Зарецкая

Keyword(s):

Contact Stress ◽

Mechanical Characteristics ◽

Block Structure ◽

Equations Of Motion ◽

Integral Representations ◽

Structure Modeling ◽

Block Element ◽

Geological Medium ◽

Stress Variation ◽

Isotropic Elastic Medium

Методом блочного элемента проведено исследование блочной структуры, моделирующей геологический массив. Состояние геологической среды описывается уравнениями движениями для однородной, изотропной упругой среды в форме Ляме. Выписаны функциональные и псевдодифференциальные уравнения, получены интегральные представления блочного элемента. Установлены основные тенденции изменения контактных напряжений в зависимости от значений механических характеристик материала блоков и геометрических параметров структуры. The block structure method is used to study the block structure modeling a geological massif. The state of the geological medium is described by equations of motion for a homogeneous, isotropic elastic medium in the form of a Lame. Functional and pseudo-differential equations are written out, and integral representations of the block element are obtained. The main tendencies of contact stress variation are established depending on the values of the mechanical characteristics of the material of the blocks and the geometric parameters of the structure.

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PREDICTION OF COMPRESSION AND EXTENSION ZONES IN GEOLOGICAL STRUCTURES BASED ONLY ON THE VELOCITIES OF LONGITUDINAL WAVES IN THE GEOLOGICAL MEDIUM

Geodynamics & Tectonophysics ◽

10.5800/gt-2019-10-2-0422 ◽

2019 ◽

Vol 10 (2) ◽

pp. 471-481

Author(s):

B. P. Sibiryakov ◽

E. A. Khogoev

Keyword(s):

Poisson Ratio ◽

Compression Modulus ◽

Geological Medium ◽

Geological Structures ◽

Reduced Pressure ◽

Longitudinal Waves ◽

Poisson Equations ◽

Rigid Contact ◽

Curvilinear Interface ◽

Problem Solving Process

The article presents accurate solutions for the problem for two elastic half‐spaces with an arbitrary curvilinear interface. Our study shows that dilatation solutions (Poisson integrals) are dependent on neither an overall compression modulus nor the Poisson ratio, and depend only on the velocity of longitudinal waves. These specific solutions can be supplemented by general solutions for an incompressible elastic medium, and the boundary conditions of the rigid contact for the sum of the solutions can thus be satisfied. Relatively simple calculations make it possible to determine the divergence of the displacement field and reduce the entire problem solving process to a study of Poisson equations with a known divergence. Furthermore, predictions of volumetric compression or extension are important for geological investigations, since the zones characterized by reduced pressure rates may act as fluid attractors.

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ASSESSMENT OF GEOECOLOGICAL CONSEQUENCES OF SUBDUCTION PROCESSES

Ecology Economy Informatics System analysis and mathematical modeling of ecological and economic systems ◽

10.23885/2500-395x-2021-1-6-79-83 ◽

2021 ◽

Vol 1 (6) ◽

pp. 79-83

Author(s):

M.V. Zaretskaya ◽

◽

V.V. Lozovoy ◽

Keyword(s):

Diffusion Equation ◽

Volcanic Activity ◽

Model Problem ◽

Block Structure ◽

Three Dimensional ◽

Factorization Method ◽

Integral Representations ◽

Transport And Diffusion ◽

Numerical Analytical Method ◽

And Diffusion

t. The aim of the work is to develop a numerical-analytical method for assessing the geoecological consequences of volcanic activity accompanying the subduction process. The boundary problem was formulated, including the three-dimensional transport and diffusion equation and boundary conditions at the bottom and surface of the water. For research, a block structure with quasi-homogeneous layers is introduced. In each block, a differential factorization method is implemented and integral representations of solutions are obtained. Calculations for a model problem are carried out, conclusions are formulated about the features of the behavior of the heavy and light fractions of volcanic ejections depending on the speed of currents, intensity and duration of the eruption.

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The differential factorization method for a block structure

Doklady Physics ◽

10.1134/s1028335809010078 ◽

2009 ◽

Vol 54 (1) ◽

pp. 25-28 ◽

Cited By ~ 7

Author(s):

V. A. Babeshko ◽

O. V. Evdokimova ◽

O. M. Babeshko ◽

M. V. Zaretskaya ◽

A. V. Pavlova

Keyword(s):

Block Structure ◽

Factorization Method

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Theory of block structure in the strength problem of galleries and constructions with multiple connections

Доклады Академии наук ◽

10.31857/s0869-5652484129-34 ◽

2019 ◽

Vol 484 (1) ◽

pp. 29-34 ◽

Cited By ~ 1

Author(s):

V. A. Babeshko ◽

O. V. Evdokimova ◽

O. M. Babeshko ◽

A. V. Pavlova ◽

I. S. Telatnikov ◽

...

Keyword(s):

Boundary Value Problem ◽

Layered Medium ◽

Block Structure ◽

Boundary Value ◽

Factorization Method ◽

Strength Problem ◽

Vector Problem

It is shown that the boundary-value problem for a layered medium with parallel multiple cavities is reduced to the Riemann vector problem. To solve it, a factorization method is developed, which makes possible to construct the solution to be built in arbitrary approximations.

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The Moving-IAT

European Journal of Psychological Assessment ◽

10.1027/1015-5759/a000305 ◽

2017 ◽

Vol 33 (6) ◽

pp. 445-452

Author(s):

Monika Fleischhauer

Keyword(s):

Internal Consistency ◽

Personality Assessment ◽

Block Structure ◽

Mental Representations ◽

Indirect Measures ◽

Attitude Research ◽

Self Reports ◽

Implicit Personality ◽

Single Block ◽

Psychometric Quality

Abstract. Accumulated evidence suggests that indirect measures such as the Implicit Association Test (IAT) provide an increment in personality assessment explaining behavioral variance over and above self-reports. Likewise, it has been shown that there are several unwanted sources of variance in personality IATs potentially reducing their psychometric quality. For example, there is evidence that individuals use imagery-based facilitation strategies while performing the IAT. That is, individuals actively create mental representations of their person that fit to the category combination in the respective block, but do not necessarily fit to their implicit personality self-concept. A single-block IAT variant proposed by attitude research, where compatible and incompatible trials are presented in one and the same block, may prevent individuals from using such facilitation strategies. Consequently, for the trait need for cognition (NFC), a new single-block IAT version was developed (called Moving-IAT) and tested against the standard IAT for differences in internal consistency and predictive validity in a sample of 126 participants. Although the Moving-IAT showed lower internal consistency, its predictive value for NFC-typical behavior was higher than that of the standard IAT. Given individual’s strategy reports, the single-block structure of the Moving-IAT indeed reduces the likelihood of imagery-based strategies.

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