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  • Model for the study of reinforced concrete slabs punching columns when heated

    A comparative analysis of the results of numerical studies of the shear strength of the two most common models fragment joint compound reinforced concrete floor slab with a column of monolithic buildings with punching and heating. Simulation of stress-strain state of concrete samples conducted in LIRA 9.6 R9 with various combinations of loads and effects in the nonlinear formulation to study the processes of their destruction. Revealed new features of the stress-strain state of reinforced concrete monolithic buildings with bezrigelnym frame with an alternative design scheme that reflects the true picture of loading plate and corresponds to the method of Eurocode 2.

    Keywords: connection node reinforced concrete slabs with a column, monolithic building with bezrigelnym frame, strength plates with cut and bursting under heat, non-linear analysis

  • The main moment of forces of resistance in the gasdynamic bearing with spiral flutes

    In this article the author considers the gasdynamic bearing with the spiral flutes which active zone is formed by two close located firm surfaces, on one of which spiral microflutes are executed. The oblique-angled system of coordinates consisting of logarithmic spirals and circles is entered. For each dyad a flute crossing point values of powers of viscous friction were received and further their main moment of resistance concerning a bearing axis is calculated, expression for the main moment of forces of resistance is found in a smooth layer. In work the algorithm, allowing to calculate the main moment of powers of the viscous friction developing in a lubricant layer of the gasdynamic bearing with spiral flutes is received.

    Keywords: gasdynamic bearing, spiral flutes, oblique-angled coordinates, resistance moment

  • Management of production systems under conditions of uncertainty: a regional perspective

    The uncertainty is investigated and regularities of their impact on production systems, taking into account the search management strategies. It is proved, that uncertainty is a parameter that accompanies any productive activity for the period of the projection; due to a number of laws (integrativnost′û, integrity, communication, hierarchical structure, osuŝestvlâemost′û, etc.); is based on two basic scenarios: conservative and innovation Are key factors of uncertainty. (information, bureaucratic, change the value of the currency, sanctions, stagnation and so on) in the development of targeted corrective measures on projected periods.

    Keywords: Uncertainty and their patterns, parameters, key factors of production systems management, corrective actions

  • Methodology to evaluate the production of electric power systems

    To date, questions the reliability and continuity of electrical energy production facilities are among the most urgent , due to the transition generation companies into private hands and aggravate financial, economic and industrial- technological challenges : depreciation and obsolescence of equipment, lack of investment and other factors, influencing the power producers .
    The article discusses the various valuation techniques of industrial enterprises and industrial complexes electricity . On the basis of their proposed universal method of estimating production complexes electricity , which is divided into 6 groups and includes weights . The article noted that the proposed method of estimating the weight of electric power systems operation has several advantages compared with the methods of other authors.

    Keywords: electricity, electricity production complexes, investment, reliability, development

  • To the theory of dispensing of seeds the pneumatic sowing apparatus of an overpressure

    The basic virtue of the sowing apparatus of an overpressure is possibility of conducting of sowing on the big speeds and with high uniformity of dispensing of seeds. But the processes occurring in the sowing apparatus of an overpressure at dispensing of seeds, are insufficiently studied. In the article one of stages of process of dispensing by the overpressure sowing apparatus - transportation of a unit seed by dosing elements of a seed disc is observed. The forces acting on a seed in the course of transportation with a dosing element of a seed disc are defined. The gravity, centrifugal force, force of air drag and pressure force of air refers to to them. The scheme of forces is presented. As a consequence of theoretical research dependence of magnitude of an overpressure in the seed vessel from key parameters of work of the sowing apparatus of an overpressure has been defined. Graphs of theoretical dependence of pressure in the seed vessel from diameter of holes and a seed disc angle of rotation are built. The analysis of the gained results allows to draw following conclusions. The increase in diameter of holes of dosing elements of a seed disc leads to considerable decrease of the pressure necessary for transportation of a seed. At increase in an angular velocity of a seed disc pressure necessary for the secured transportation of a seed is augmented. The increase in an angle of rotation of a seed disc puts insignificant agency on pressure in the apparatus seed vessel.

    Keywords: seeds, transportation, dispensing, forces, an overpressure, a dosing element, a nominal diameter, dependence.

  • fertilizer, vane, rotor, curvature, angle of slope, speed, crushing

    In the article results of theoretical researches of the rotor scatterer of fertilizers are resulted. For elimination of adverse conditions shock interactings of particles of fertilizers with rotor vanes, possibility of application of curvilinear vanes is observed. The forces acting on a particle which moves on a curvilinear vane are justified. Schemes of act of forces and the scheme of interacting of particles of fertilizers with a curvilinear vane taking into account width of a torrent are presented. The transcendental equation numerical solution on a method the Runge-Kutty is resulted. The analysis of dependences of the kinematic operating modes of the scattering apparatus from design parametres of a curvilinear vane is carried out. The time of interacting of a particle of fertilizer with a surface of a vane taking into account its curvature and a slope is defined. Conclusions are drawn on possibility of lowering of crushing of particles of fertilizers at the expense of blow decrease in a normal direction.

    Keywords: fertilizer, vane, rotor, curvature, angle of slope, speed, crushing

  • Calculation of coefficient of operating conditions of pipelines of the West Siberian region.

    Calculation of coefficient of operating conditions of the pipeline is presented in article for the West Siberian region. Dependence of service life of the pipeline on this coefficient is presented. The data of samples witnesses received in laboratory of nondestructive control, confirming relevance of this subject are provided.

    Keywords: corrosion, wall thickness, standard service life, pipeline, coefficient of working conditions, diameter, pressure, settlement resistance.

  • Improvement of on-board control systems of locomotives on the basis of technical means of trainer-modeling complexes

    The main maintenance of a diversification of production as activity of subjects of managing is considered. being shown in purchase of the operating enterprises, the organizations of the new enterprises, redistribution of investments in interests of the organization and development of new production on available floor spaces. The most important organizational economic targets of a diversification of management are presented by innovative activity of the industrial enterprise.

    Keywords: Trainer-modeling system, the hardware-software robotic complex, control system, autodriver, automatic control of the brakes of the train, computing experiment

  • Justification life extension bearing precast low-pressure water-lifting shield dams

    The problem of justifying extending the service life of hydraulic structures in Russia is unsatisfactory condition requiring modernization and refurbishment. Currently in Russia over the length of the river network of 2.37 million sq km includes more than 125 thousand rivers that can be used for navigation. When locking, the most widely found as regulator control structures of low pressure shield dam spillways with metal swivel farms most widely used when evaluating the residual life of structural elements carrying water conveyance structures, has an integrated risk assessment of the accident. According to the distribution curves can be classified technical condition of each item, such as rods and plates in various defects as small and dangerous damage the elements included in the design. During the simulation obtained contour plots of stress-bearing low-pressure water-lifting precast shield dams for subsequent prediction justify continued reliable exploitation. The concept of life extension studies supporting structures prefabricated low-pressure water-lifting shield dams on the example of individual structures bearing elements, prefabricated low-pressure water-lifting shield dams, based on modeling of the loading process from various defects and damage due to prolonged use.

    Keywords: water-conducting structures, prefabricated pumping low-pressure-mounted dam, modeling, technical condition, residual life.

  • Analysis and development of approaches for the stimulating part of engineering staff remuneration

    The paper presents and analyzes the main methods of material stimulation of engineers and technician staff on russian and partly foreign enterprises, taking into account national management models. The article highlights the indicators that affect the stimulating part of remuneration for different occasions.

    Keywords: engineering and technical personnel, remuneration, the stimulating part of remuneration, performance labor.

  • Economic aspects of diversification of thermal energy taking into account ecological requirements

    Reviews the basic contents of diversification of thermal power plants, which will contribute to improve environmental and economic performance in the industry.

    Keywords: diversification, enterprises of power industry, enrichment of coal, ash dumps, pollution, species blade, air pollution, ash, slag ash, secondary resources.

  • Determining the most efficient method and the availability of the field condensate pipeline diagnostics in the absence of the main product being pumped

    Development of the field condensate pipeline diagnostics scenario in the absence of the main product being pumped because of shutting down production process. Different diagnostics scenarios modeled by author and the most efficient method choosing were considered in this article.

    Keywords: Pipeline diagnostics, operation regime, scenario, nitrogen, diagnostic options

  • Analytical definition of a form of the greatest capacity of bulks forming of the conic bunker

    The analytical decision on definition of a forming wall of the bunker of the greatest capacity is provided in article among all bunkers having identical entrance and exhaust outlets. Such bunkers are intended for a hydraulic type of the expiration of bulk. They reduce a pulsation loose at its exit from the outlet and reduce extent of influence of the dynamic arches by account characteristics of the bunker.

    Keywords: sliding lines, entrance openings, outlets, bunker, loose body, expense of the loose.

  • The physicochemical analysis NH4NO3 – KNO3 – Н2О system at 25 degree C

    In the article are introduced research results of physicochemical properties of ammonium nitrate – potassium nitrate water system at 25o C. The literary source analysis is performed that no clear opinion about solid phases composition. The different composition double salts, solid solution and eutectics are identifies. Appeal is specifies a look and properties of formed structures. Methods of differential thermal analysis and X-ray diffraction have been establishing that the equilibrium solid phase of the studied system represents two types of solid solutions. A first type based on the III phase of ammonium nitrate crystal latitude (at the content of nitrate of potassium to 20 %) and a second type based on the potassium nitrate rhombic syngony (at the content of nitrate of potassium more than 80 %). Crystal cells parameters of being formed phases submit to the Vegard rule. The ammonium nitrate sample (at the content of nitrate of potassium more than 12 %) keeps phase stability at the temperature range minus 50 to plus 100о С. Burst in components miscibility at the potassium nitrate concentration range 30 to 80 % is observed.

    Keywords: ammonium nitrate, potassium nitrate, differential thermal analysis, X-ray diffraction, cocrystallization, solid solution

  • Optimization of management processes hydraulic drive, using the methodology of the joint maximum principle

    We propose a method for constructing of algorithm of smooth management by the hydraulic actuator  based on the method of combining the maximum principle. Such management increases the accuracy and non-failure operation of operation of the device

    Keywords: the integrated principle of a maximum, management, the hydraulic actuator, synthesizing function, management synthesis, asynchronous variation