×

You are using an outdated browser Internet Explorer. It does not support some functions of the site.

Recommend that you install one of the following browsers: Firefox, Opera or Chrome.

Contacts:

+7 961 270-60-01
ivdon3@bk.ru

  • Stress-strain state of the radiation-heat shield of a nuclear power plant reactor

    The article conducts a study of the stress-strain state of the protective structure, taking into account temperature and radiation effects. Dry protection is a thick-walled cylindrical shell rigidly clamped at the base. The analysis is carried out in axisymmetric formulation. The calculation of the stress-strain state is preceded by the determination of the distribution of physical fields in the thickness of the structure. The stationary temperature field is considered taking into account internal sources of heat release. The diffusion approximation is used to determine the distribution of the neutron fluence. The calculation is performed numerically using the finite element method in the Matlab package. The results are compared with and without induced inhomogeneity. The significant influence of inhomogenity on stresses in the structure is shown. At the same time, taking into account heterogeneity does not lead to a significant change in displacements.

    Keywords: thick-walled cylinders, stress-strain state, numerical methods, neutron fluence, temperature field, inhomogeneity, finite element method

  • Investigation of heat transfer resistance in the construction of the "green roof" in comparison with the traditional roof

    The reorganization of existing coatings of public buildings into the “green roof” technology is possible in cases of the generation of an extensive type of green roofing system and, extremely rarely, of an intensive type. To clarify to the above, the load from the green roof of the extensive type in a water-saturated condition on the bearing part of the structural system of the building is 80 ... 100 kg / m2 with a substrate thickness of not more than 0.07 ... 0.15 m. Therefore, in most cases the introduction of this type of green Coverage in public buildings of the existing buildings is feasible.

    Keywords: green roof, thermal resistance, strength of parts of the structure, functional zone, limit states, construction, technology and organization of construction

  • The use of BIM-technologies in the design and reconstruction of buildings and structures

    The article is devoted to development of information modeling technologies in Russia. The possibilities of using 3D-models, their advantages and disadvantages are conserned.

    Keywords: Information modeling, engineering, building operation, real estate life cycle

  • Simulation of the design activity diversification of innovative enterprise

    The article proposes a concept system of connected together and arising from one another views on the creation and practical use of shore control center (SCC) by autonomous unmanned underwater vehicles (AUV). Within the framework of the above concept, the threats having the most significant impact on the AUV control, as well as the methods and means to counter these threats, are determined. The information passing and processing in a system for collecting, transmitting and displaying information (SCTDI) are considered as a parallel set of independent routes, information on which flows to the SCC AUV. In terms of the theory of flows and queuing systems (QS), in a dynamic sense, the system of collecting, transmitting and displaying information (SCTDI) deals with the composite flows, which are non-stationary in general, possibly with after-effect (correlation). Fines are in force at all levels of information collecting and transmitting and even imposed on a decision maker (DM) who makes a decision to use the AUV. Considered are the possible options for coordinating decisions developed by the SCC and AUV automated control systems, in which the decisions are made by the artificial intelligence created by man. The lower level consists of a collection, a series of convolutions and contractions, and finally, the Z-scene itself, messaging, situation, and just the situation is the subject of cognitive identification in the X-scene by the decision-making system. That is, the decision block includes an automated subsystem and a decision maker, which interact in a dialog mode.

    Keywords: coastal control center (BCU), autonomous unmanned underwater vehicle AUV, system for collecting, transmitting and displaying information (CSPAI), queuing system (SMO), System for collecting, transmitting and displaying information ACU, decision making

  • Study and evaluation of the possibility of using waste waterjet cutting steel for the manufacture of building ceramics

    The article examines waste waterjet cutting steel. A comprehensive study of waste abrasive cutting was performed: the average and bulk density, particle size distribution, chemical composition were determined. It has been established that waste of hydroabrasive cutting of metals are very fine, heavy sands with a high content of dust-like fraction, in the chemical composition of which oxides of iron, silicon and aluminum predominate.

    Keywords: green roof, thermal resistance, strength of parts of the structure, functional zone, limit states, construction, technology and organization of construction

  • Conceptual basics of creating automation systems for low-capacity boilers with fluidized bed during the construction and reconstruction of coal-fired boilers

    The article presents the concept of creating automation systems for three types of low-power power plants with a fluidized bed. A review of coal combustion technologies in the high-temperature and low-temperature fluidized bed was made. The characteristic of functional and technological features of the working processes of low-power boilers with furnaces of high-temperature fluidized bed is given, with the formulation of the main conceptual provisions defining the basic principles of building automation systems

    Keywords: high-temperature fluidized bed, low-temperature fluidized bed, active boiler utilizer, conceptual position, automation

  • Implementation of the portal for the management of the "South-Western deanery" of Rostov-on-don

    The creation of a social project-a portal for the management of Rostov-on-Don "South-Western deanery". The second and third stages of the LC IP creation are presented: design and implementation of the portal. We used CASE technologies for design. The UML language in the Rational Rose platform realized methods of the object-oriented approach. ERD diagrams were built, using ERWin case technology for the database design according to the rules of IDEF1 and IDEF1X standards. The user interface design is also given. The described model was implemented, using the WordPress CMS technology platform. The fragments of the created Web-resource are given.

    Keywords: pilgrimage, virtual tour, information system design, object-oriented approach, Rational Rose, UML, sequence diagram, cooperative diagram, data base design

  • Modernization of the management structure of the construction company

    The question of improvement of material and technical support of construction production is considered. The article reports on the experience of innovative organization of delivery of the solution to construction sites. The process of organization of work of transport enterprises, accounting of the delivered material is described in detail

    Keywords: construction organization; construction Economics, resource management

  • Bibi-Khanym mosque as a historical and architectural complex

    The history of the study of the archaeological complex of bi-Khanum swords in Samarkand is considered. The description of the ancient building is given. The methods of construction of the monument are studied, the reconstruction of the ancient appearance of the complex, the materials used and construction methods are given

    Keywords: organization of construction; history of architecture, history of the industry

  • Innovative methods to reduce the cost of crane beams

    The issue of improving the cost reduction of crane structures is considered. Results of experimental experience of the device of beams of new type are given. Methods of economy of materials at production of beams are offered

    Keywords: organization of construction; economy of construction, construction of cranes and crane tracks

  • Application of structural coatings in frame-type buildings

    The question of economy of metal at production of building designs is considered. Measures for the organization of effective production in the current projects of high-rise and long-span buildings are proposed. Measures of increase of efficiency of construction are considered.

    Keywords: organization of construction; economy of construction, production of building materials

  • Improvement of technical documentation in the organization of resource supply of the construction company

    The question of improvement of technical documentation at the organization of supply of construction is considered. Measures are proposed to ensure the reliability of work, taking into account the experience of domestic construction companies. Measures of increase of efficiency of construction are considered

    Keywords: organization of construction; economy of construction; document flow in construction

  • Problems of energy saving in the sphere of housing and communal services in Russia

    Legislative acts regulating relations on energy saving in Russia and Rostov region are considered. The article presents the main problems of energy saving in Russia. The main reasons for the low level of energy saving in residential buildings are considered.

    Keywords: energy saving, energy efficiency, housing and communal services, energy saving technology, residential building, resource, building, building, energy efficiency class

  • Construction and design of buildings and structures in permafrost

    " The article presents research on the problems of construction and design of buildings and structures in the permafrost of Russia. Based on the research work, the principles of construction on permafrost soils are formed. It is shown that the design and construction of buildings and structures can be carried out, provided that the foundations of the soil remain frozen during construction and during operation, and in cases where the soil necessarily becomes thawed during construction or during operation buildings and structures."

    Keywords: construction, design, permafrost, soil, foundation, structures, the Far North, climate, soil, building, structure

  • The principle of coating of welded products with metallized coatings

    The question of improvement of coatings of welded products is considered. The possibility of replacing sandblasting is being studied. The possibility of reducing the cost of welding is considered

    Keywords: construction materials, reduction of construction materials costs

  • AutoCAD in the practice of designing building objects

    An overview of the current state of the design of building objects is presented, and the possibilities for improving its quality are described based on the AutoCAD computer-aided design system, the development of which begins at the university level. Describes the sequence of building a plan for a one-story building using AutoCAD.

    Keywords: Construction, design, project documentation, drawings, AutoCAD, engineering and computer graphics

  • Experience of Foundation installation on pre-compacted soil

    The question of the device of the bases on preliminary condensed basis is considered. Measures are proposed to ensure the reliability and durability of the structure, taking into account the experience of construction in the USSR. Measures of increase of efficiency of construction are considered.

    Keywords: organization of construction; economy of construction, soil strengthening, foundations

  • ORGANIZATION OF INTELLIGENT CONTROL SYSTEMS ON THE BASIS OF NEUROREGULATION

    The article considers a number of proposals aimed at improving the efficiency of the design, training and operation of neural network models within the framework of control systems for complex objects. This includes: organization of processing of networks of large dimenstionality; development of neuroevolutionary procedures; providing opportunities for the formation of neural network models in a single cycle of designing automated systems. The hierarchical construction of network structures is considered as an apparatus that provids work with network models of high dimensionality. At the same time, unlike the traditional approach associated with cutting the graph of an already synthesized model, the article proposes procedures for synthesizing a generalized model from structural elements. The formal descriptions of structural synthesis introduced in the article can serve as a basis for organizing software and hardware interfaces of the forming models. The formation of such neural network structures within control systems is associated with the proposed and described concept of neural network regulators as the basic elements of building intelligent automated systems. The article also examines and describes as a neuroelement a model of a dynamic neuron with a state memory, allowing to implement the mechanism of self-evolutionary development of the network directly in the course of its operation.

    Keywords: control / management system, dynamic neuron, neural network model, hierarchical structure, self-evolution mechanism

  • Principles of space-planning solutions in the design of Orthodox churches

    The article describes the principles of space-planning decisions in the design of Orthodox churches. The forms that form the spatial models of Orthodox churches are diverse in their decisions in spatial and functional aspects. Interior premises are displayed in various volumetric and architectural-artistic variations of structural elements that determine the diversity of Orthodox churches, with a limited choice of plan compositions. The spatial composition of the church is based on the conditions and requirements of worship and the symbolism of its individual parts and elements associated with the dogma of Orthodoxy.

    Keywords: architecture, orthodox Church, Church, space-planning solution, architectural and artistic solution, composition, altar, throne, temple area, symbolism, shape

  • Algorithm of approximation of difficult surfaces the developed surfaces

    In this scientific article the algorithm of approximation of curve surfaces of irregular geometrical shape is considered by the line developed surfaces. The methods of graphic modeling of a surface which are of interest are analyzed. Need of application of various ways of modeling of difficult surfaces for the modern world is reasoned. It is shown that certain algorithms of approximation of line surfaces can be demanded at rational use of calculations at a stage of designing of a wide number of products in construction, architecture and the equipment.

    Keywords: approximation, algorithm, line surfaces, modeling, curves, surface section, technical designing

  • On the development of facade glazing systems for civil buildings

    A comparative analysis was made of the evolution of the development of facade glazing systems in the design of public buildings both abroad and in Russia. It has been established that both abroad and in Russia are characterized by the appearance of buildings with continuous glazing, the production of glass and double-glazed windows of a new generation: with magnetron application of heat-reflecting coatings and with energy-saving characteristics. The shape, size, placement of the glazed surfaces of the facade were determined by the climatic conditions, economic and scientific-technical development of the countries.

    Keywords: Facade glazing, translucent facades, Bauhaus, Le Corbusier, stained glass, cold-formed glass, cold facade, exhaust facade, external natural factors

  • Information-analytical computer system of labor protection support in educational institutions

    The article is devoted to the study of the impact of information technology on the organization of labor protection. The applied significance of the research is that modern approaches to the organization of labor protection imply a wide use of information technologies. Informational support of labor protection is an important part of a systematic approach to ensuring safety, improving working conditions and reducing occupational risks. The paper describes the economic efficiency of creating an information and analytical system for labor protection. In the course of the system research, the main functions were identified that should be implemented by the information system using modules. Considered 6 main objectives of the study.This work is relevant due to the fact that the results of the study can be used in higher education institutions to optimize their work. The author analyzed the result of the study, noting the importance of introducing an information and analytical system for labor protection in connection with its practical and economic feasibility for higher education institutions with a large number of employees and, consequently, with a large amount of information that needs daily processing and analysis.

    Keywords: information and analytical system, labor protection, module, injuries, social policy, information technologies

  • Experience in development of construction project documentation in the USSR

    The question of development of project documentation in the USSR is considered. The possibility of using this experience in modern times is being studied. The problems of interaction of organizations of different profiles at the design stage of construction.

    Keywords: organization of construction; economy of construction, history of the construction industry

  • Ensuring the stability of high-rise unique buildings. Architectural-planning and constructive rhenium

    The article explores various architectural and constructive solutions that ensure the stability of high-rise unique buildings and structures under the action of significant transverse loads arising from strong wind influences. Recommendations are given for choosing constructive solutions for achieving the greatest stability and rigidity of high-rise buildings.

    Keywords: high-rise unique building, stability, load-bearing systems, modeling, progressive collapse, structural system, outrigger, skyscraper, column, core of rigidity, strength, reliability, horizontal load

  • The estimation of survival function of power producing papelinecontrol valve

    This paper deals with the investigation of crack strength of nuclear reactor cooling system wedge valve body. The main fracture mechanics expressions linking stress intensity factor with cracklike defect length are presented in the introduction. Analytical equations for reliability function evaluation are obtained, fracture toughness and stress intensity factor are viewed as Gaussian random values in the second part of the paper. The statistical linearization method is used to determine the distribution parameters (mean value, dispersion). The stress intensity was estimated by the finite element method with the use of SolidWorks Simulation system. Calculations are done for different types of cracks: throughwall, edge and semielliptic. It is shown that the presence of cracklike defects, even of small length, rather reduces the level of reliability function.

    Keywords: fracture toughness, stress intensity factor, survival function