Gagarin, Russia

Don State Technical University

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Gagarin, Russia
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Pozharskii D.A.,Don State Technical University
Journal of Applied Mathematics and Mechanics | Year: 2017

A system of two elastic equilibrium differential equations is studied in polar coordinates when Poisson's ratio is an arbitrary sufficiently smooth function of an angular coordinate and the shear modulus is constant. The elasticity modulus is also found to depend on the angular coordinate in this case. A general representation of the solution is proposed which leads to a vector Laplace equation and a scalar Poisson equation, the right-hand side of which depends on Poisson's ratio. When projected, the vector Laplace equation reduces to an elliptic system of differential equations with constant coefficients. Exact general solutions of the Laplace and Poisson equations are constructed in quadratures using a Mellin integral transformation and the method of variation of arbitrary constants. A contact problem for an inhomogeneous wedge is considered and the stress concentration at the vertex of the wedge is studied. © 2017 Elsevier Ltd.

Neydorf R.,Don State Technical University | Neydorf A.,Don State Technical University
SAE Technical Papers | Year: 2016

The main difficulties of the mathematical models vehicles creation are defined by strongly nonlinearity of dependences which connect various variables their states and conditions of the movement environment. Most it belongs to aircrafts as aerodynamic interactions are characterized by essential nonlinearity up to discontinuity of variables and their derivatives. Creation process of these models is complicated by high-dimensionality, characteristic for the mechanical movement laws. Experimental creation of the mathematical models (MM) of such dependences is carried out by various mathematical methods of approximation of data. Universal remedies of the solution of the formulated task don't exist. Each of it possesses both benefits, and considerable shortcomings. In this regard the possibilities of a method creation of high-precision analytical approximations of the strongly nonlinear dependences using the analytical functions have been investigated. The Cut-Glue approximation (CGA) method for one-dimensional dependences is justified, and then this method is developed for approximation by functions of two arguments. In this method approximation is carried out by splitting of data into fragments similarly as in the method of piecewise approximation. Each data fragment is approximated by suitable function from which along its borders is cut out a fragment of this function. Cutting out of the function fragment is carried by multiplication its on the other nonlinear function with special characteristics. Properties of a nonlinear multiplier are such that in borders of a fragment of its value coincide with the approximating function, but are almost equal to zero in other range of definition. The received fragments are glued together in the united function which is model of the overall approximated dependence. The advantage of the Cut-Glue approximation method is differentiability of the mathematical models. It gives the chance to investigate functions analytically and to use their in MM of dynamics. In the offered article the possibility of application of a method for creation of nonlinear models of any dimension is proved and the ideology of accomplishment of all stages of "Cut-Glue" approximation is formulated. Tasks of optimum splitting experimental data into fragments, approximations of these fragments by analytical functions and their effective pasting in single in MM are formalized. The received result significantly expands a application area of a method and its opportunity in problems of mathematical modeling of dynamics of aircrafts and vehicles in general. Possibilities of optimal multidimensional "Cut-Glue" of approximation are illustrated by an example. © Copyright 2016 SAE International.

Klimenko P.,Don State Technical University
MATEC Web of Conferences | Year: 2017

Logistics factors determine types of Logistics Centers and their architectural solutions. Globalisation, rapid growth of trade and ecology change modern Logistics Centers, complicating their structure, requirements, interactions with big cities, and diversifying their functions. Such logistics factors as means of transport, kinds of goods, roadways can't be ignored in conditions of modern overloaded and polluted big cities. © The Authors, published by EDP Sciences, 2017.

Vorobyeva A.,Don State Technical University
MATEC Web of Conferences | Year: 2017

The article deals with the problem of historical transformation of natural landscape as a result of urban development of territories. We identified historical processes of natural landscape transformation from the beginning of its urban development till the formation of modern cityscapes. Distinctive characteristics and peculiarities of natural landscape were defined. We distinguished main types of landscape (flat, piedmont and mountain landscapes). Time periods of the development of city territories of the region with various landscape conditions and main stages of historical development of these territories are considered, as well as historical features of their development, temporal processes of complication of interrelations of various factors and characteristics of urban environment, and other problems of human activity influence on city landscape components, including the impact on the ecological state of the region. © The Authors, published by EDP Sciences, 2017.

Shumeyko V.,Don State Technical University
MATEC Web of Conferences | Year: 2017

Tall buildings and skyscrapers perceive significant vertical loads and, moreover, have to resist large lateral effects which form strong gusts of wind and seismic events. In the world for the high-rise buildings with the nuclei of the stiffness are using streamers - outriggers, which connect the external column and the core form the support system and resist lateral loads. High-rise buildings construction grows promptly around the world and causes new problems which shall be solved on the basis of the modern constructive opportunities, by means of exact engineering assessment. Systems of outrigers and belts are very important in the modern engineering, because they provide effective control over side shifts of a building. They play an important role in high-rise unique buildings constructions, being a link between the central kernel and outer columns. The article deals with the design scheme of conventional conveyor of belts and outriggers - bandages, explores their applications, advantages and disadvantages of various options, problems with their design. Presented material enables the design of unique high-rise buildings to choose the most optimal design solution. © The Authors, published by EDP Sciences, 2017.

Treyman J.,Don State Technical University
MATEC Web of Conferences | Year: 2017

The article is devoted to the particularities of the process of musefication of the historic and cultural legacy of Medieval Alania, an integral part of natural landscapes of the North Caucasus. It turned up that the natural and spacial carcass of the North Depression pot hole was the particular scenario for the development of territorial and spacial organization of settlements. The carcass is also the basis for the development of the museum exposition. Museum and touristic routes can be created following ancient trade routes, along which the alans created their settlements. The alans animated the nature and created a network of sacred objects. It can be represented in the form of a carcass structure consisting of sacral objects (such as sacred mountains, trees, groves, springs, lakes, separate stones, caves etc.). The sacred objects and the routes to them formed sacred topography of Alania. They can be used as the centerpieces of the museum and tourist routes. The alani settlements situated along the roads can be the main elements of expositions. Revealing and preserving spacial structure and historic connections between the objects of the main exposition should be the basis of our conception of musefication of the historic and cultural landscape of Medieval Alania. This decision will let us demonstrate the unique objects of region's cultural legacy including the historic landscape in the best possible way. © The Authors, published by EDP Sciences, 2017.

Ovchinnikova N.,Don State Technical University
MATEC Web of Conferences | Year: 2017

This article covers the problems of modern urban districts and settlements of the Rostov region with due regard to the organization of their territories. Prospects for the further development of the urban districts and settlements are defined based on the goals of the urban-planning activity. Short-term and mid-term trends of residential construction in the Rostov region are classified in terms of the improvement of town-planning documentation. It is concluded that the territorial planning organization is an integral part of sustainable territorial and urban development of any region. © The Authors, published by EDP Sciences, 2017.

Pishchulina V.,Don State Technical University
MATEC Web of Conferences | Year: 2017

A mono-apsishall church - is the most popular temple type of the Medieval period in the North Caucasus. The transformations of their design in the North Caucasus during the considered period are connected both with the introduction of samples from Kartli, Abkhazia, Armenia, Albania and Svaneti in the XI-XII centuries, and development of Christian culture of Alania. Temples of this type in the North Caucasus can be divided into three big groups according to the character of their planning composition: three-part hall churches, churches with the entered apsis, churches with the projecting apsis. The first two types of temples are traditionally connected with the Georgian influence. As the composite type, this temple was created in Armenia where from the IXth century it is presented by a significant number of monuments. With nuance changes and additions made by the Georgian missionaries this type has found its way to Dvaletiya's territory where it is presented by a large number of objects, and also to the kingdom Serir where only two temples of this composition remain. For Dvaletiya's temples it is Kartli, for temples in Dido - not only Kartli, but also Armenia, for temples in the river basin of the Kuban - Abkhazia, but this region was also influenced by the Armenian architecture due involvement of craftsmen from Kafy. © The Authors, published by EDP Sciences, 2017.

Miroshnichenko I.P.,Don State Technical University
Springer Proceedings in Physics | Year: 2017

This article analyzes the characteristics of the stress-strain state of layred cylindrical constructions made of transversely isotropic materials under pulse influences arising due to the curvature of the surface of the examined structures and the physical and mechanical properties of materials of layers. © 2017, Springer International Publishing AG.

News Article | November 24, 2016
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