Results of research of fixture of a wooden design of the river mooring in Rostov-on-Don, being in operation within more than 150 years are presented. As the fixture was possible to be taken from a design in a single copy, it wasn't represented possible to apply destroying test methods. Therefore mechanical characteristics of metal were measured by means of system of nondestructive control "Durability", developed at the Rostov state construction university and a portable tverdomer with ultrasonic and dynamic sensors. Approximate compliance of strength characteristics of studied metal, allegedly krichny iron is established, to characteristics let out now staly. Approximately on a fluidity limit studied metal corresponds to a limit of fluidity of St3 steel. The short analysis of loss of the area of live section of fixture and the forecast of possible further operation of a design in the assumption is made that conditions of this operation won't change.

Keywords: non-destructive testing, mechanical properties, strength, diagnostics, a priori information, test the metal

The article discusses the liveability as a key condition for sustainable development of territories, presents the criteria to assess the level of sustainable development of the area municipalities. The criteria of evaluation of the quality of the environment, as well as the interaction of the three components of sustainable development of the territory.

Keywords: sustainable development of the area, comfortable environment, the stability of the system, the quality of the environment, spatial planning

We obtained the solution of the optimization problem for the step-parallel beam with constant width of the cross-section. The problem was solved by minimizing the strain energy while the volume of beam is constant. The solution was made for the case of simple support at the ends and evenly distributed along the length load. We introduced the parameter α, which is the ratio of height of the average part to a height of side parts. The optimal value of α was found. At this value the stiffness of the beam is maximum at constant volume. The obtained beam of maximum stiffness is not equal strength.

Keywords: optimization, speed-prismatic beam, the strain energy, variable stiffness, minimum

We solved the problem of optimizing the gable beam by minimizing the strain energy at constant volume. The problem reduced to an integral equation for determining the optimum angle of the beam. This equation was solved numerically by the method of bisection. Integral was calculated using the method of trapezoids. Solution was made in software package Matlab. The optimum angle depends on the width of the cross section b, and the volume of the beam. It was found that with increasing of width of the cross section the optimum tilt angle decreases. Also the volume increases by increasing the width of the beam.

Keywords: optimization, gable beam, strain energy, variable rigidity, minimum volume, method of bisection

In the context of the autonomous functioning of special equipment in the Far North and the Arctic is necessary to use its internal resources to maintain optimal thermal state units and units. This can be accomplished using a heat recovery system of the internal combustion engine. For this purpose the heat accumulator. The mathematical modeling of the thermal state of the heat accumulator in the cooling stage. The main factors affecting the cooling time of the thermal battery: TA insulation thickness, weight coolant, coolant temperature, air temperature, wind speed. Also developed a mathematical model of the process of cooling the heat accumulator in general terms. It is presented in graphical form, which simplifies the determination of the time of cooling the heat accumulator in its design. For the definition of Q and Bi developed a program «Time».

Keywords: operation, heat storage, thermal preparation, heat transfer, heat recovery system, low negative temperature

Results of researches on influence of heat treatment on physicomechanical properties of the clay slates and sandstone extracted in the Rostov region are stated. It is established that the decorative effect for clay slates can be gained by heat treatment at temperatures of 300-500C then rock on all volume changes color with gray to the red-brown. Thus durability of samples at a bend increases by 20-70%. For change of color of a front surface of natural stones structures of coverings on the basis of phosphatic sheaves and the developed low-temperature enamel were considered. For giving to a layer of necessary flowers various ceramic pigments were used. Frost resistance of stones with coverings on the basis of phosphatic sheaves and enamel more than 50 cycles that testifies to the high durability of coupling of a decorative layer with a stone surface. It is defined that by use of simple technological decisions and inexpensive raw materials, the range of flowers of natural stones can be expanded significantly.

Keywords: natural stone, heat treatment, volume coloring, decorative covering, durability, water absorption, frost resistance

The quantity of carbide component in the deposited coating made subsonic and supersonic gas-powder surfacing. The investigations, which revealed that the preferred method is a supersonic gas-powder surfacing in the lower position.

Keywords: supersonic gas-powder cladding, carbide component, protective coatings, subsonic gas-powder cladding microstructure

Results of laboratory researches on determination of suitability of clay raw materials of the Zvezdinsky field for production of a facing ceramic brick are stated by way of plastic formation. It is established that for receiving faultless products it is necessary to reduce air shrinkage and sensitivity to drying of a structure. Additives – sandy loam of the Dubovsky field and a fuel-bearing additive are for this purpose used. For increase of frost resistance of a ceramic crock entered the mineral modifying additive into a structure – waste of production of mineral fertilizers. Its introduction in number of 5% allowed to increase frost resistance to 50 cycles without deterioration of appearance of the burned samples. In addition, on the burned samples made of all structures there was a whitish raid. For the purpose of receiving a monophonic surface the svezhesformovannykh of samples applied special water solution for elimination of a white raid on two sides. These actions reached receiving the samples corresponding to facing products.

Keywords: clay raw materials, facing brick, plastic formation, mineral modifying additive, air shrinkage, sensitivity to drying, frost resistance

Article is dedicated to increasing the effectiveness of the regional integration policy of the Southern Federal University in southern Russia. The concept of creation and development of educational research and innovation complex - Department of regional integration on the basis of the higher school of the university.

Keywords: South Russia, South Federal District, Southern Federal University, technology department

The article investigates the formation and development of the network of the Cossack cadet corps in Russia. Cadet education is seen as a unique and effective system for producing high-quality secondary education and upbringing of the younger generation.

Keywords: Cadet Corps, military education, the Cossacks, traditions and education

The assessment of economy of the electric power and reduction of emission of greenhouse gases across the Nizhny Novgorod Region due to introduction of the equipment having marking in household sector, the budgetary sector and on other objects of energy consumption (buildings) on prospect till 2030 is carried out

Keywords: marking of power efficiency, engineering equipment, electrical household appliances

In article the basic principles and factors having impact on successful functioning of regional infrastructure are considered the analysis of priority investment projects of the Chechen Republic is carried out, practical recommendations about improvement of infrastructure service of real sector of economy are made.

Keywords: production infrastructure, target programs, priority directions, investment projects, social and economic problems, transport complex

in modern conditions become widespread trenchless methods for the construction of pipelines. The positive features of their use include increased speed pipeline installation, reducing the volume of excavation, etc. Existing regulatory documents limit the bending of the pipe at low temperatures need to be tested in terms of their applicability to new grades of polyethylene. The aim of this study was to determine the minimum permissible bending radius of the track, the passage of which in the conditions of negative temperatures polyethylene pipes PE80 would maintain its strength characteristics. By using a mathematical model dependency of the elastic modulus and yield point are calculated from the temperature stresses in the walls of pipes of different diameters in bending under different temperatures. In order to establish empirical relationships voltage on the pipe diameter and the radius of its bend procedure is carried out function approximation method of least squares. Presented obtained graphic dependences. Using the values ​​of the yield strength of the material at different temperatures were calculated bending radius of all dimensions. If the production of the track plow trenchless pipe-layer will be considered given the conditions, you will be provided with the necessary conditions for installation.

Keywords: plastic pipe, trenchless pipe layer, the stress-strain state, trenchless techniques, pipelining

The article describes and analyzes how to determine the thermal residual stresses. The conclusion, based on the analysis, showed the necessity of the calculation method for determining the residual stresses, which is based on a mathematical model of the formation of residual stresses and deformations occurring during heat treatment. The results of calculation of stresses and comparison with experimental data are given.

Keywords: residual thermal stresses, finite element method, heat treatment, low-hard details

The phenomenon of buckling under the creep of concrete arches was investigated. Solution of the problem carried out by means of the finite element method. To analyze the stability we used Newton-Raphson method. It has been established that there is a long-term critical load, beyond which the growth of the deflection has not fading character. As the equation of the relationship between the creep deformation and strains we used viscoelastoplastic hereditary model of aging concrete. To determine the creep strain we used a linear approximation with respect to time. It was found that the long critical load for considered arch was in 1.44 times lower than the instant critical load.

Keywords: reinforced concrete arch, stability, creep, geometric nonlinearity, finite element method, Newton-Raphson method