Kuban State Technological University
Author list of organization
List of articles written by the authors of the organization
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Description
Currently, it is important to have a solution for problems related to the prevention of potential accidents and the minimization of technological risks, particularly in the oil and gas industry, the number of accidents in which remains at a high level. Causes of incidents and accidents at hazardous production facilities are often non-compliance with required technological parameters, insufficient equipment of the technological systems with safety devices and automated control systems of processes. The article presents a comparative analysis of the methods that can be used in identification of hazards at different stages of the life cycle of the technological object: location, design, commissioning, operation, reconstruction. In order to develop security measures for the selected plant, we have used a method of analysis hazard and operability (HAZOP). The object of the study was projected technological installation for obtaining of bitumen with 24 thousand tons per year performance on raw material. For the working group of experts we have step-described the order of research dangers of specific nodes of the process plant, including determining the adequacy of the protective measures provided by the project and the development of recommendations on elimination of the revealed deviations and to reduce the effects of their manifestation. The most harmful deviations of process parameters during operation of the installation were found. We have proposed hazard criteria of operation, taking into account the probability and severity of deviations of technological parameters. We have also confirmed that the HAZOP method allows not only to identify the causes of hazards and consequences of their implementation but also to develop recommendations for their elimination
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ANALYSIS OF PROCESS OF DESTRUCTION OF ROCKS WITH A CHISEL АT DRILLING OF BORE HOLES
DescriptionТhe physical processes, arising on a face at interaction of a chisel with rocks are considered. The mathemati-cal description of model of mechanical speed of drill-ing in a function from speed of rotation, twisting mo-ment, diameter of a chisel and properties of destroyed rocks is executed
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ANALYSIS OF THE PROBLEM AREAS IN THE KRASNODAR TRANSPORT NETWORK AND ACTIVITIES TO DISCHARGE THEM
DescriptionThe main causes of congestion in the city are single-level intersections regulated by traffic-lights and an insufficient number of lanes. The article provides an analysis of two problematic intersections and suggestions for their discharge. For trilateral junction of Yaltinskaya - Uralskaya with an electric model it was determined that the number of lanes needed for different areas increased to 4 - 8. However, the causes of the conflict - the intersection of two competing streams – the turn from the bridge to Yaltinskaya street to Uralskaya and oncoming traffic from Yaltinskaya to Severnaya. Traffic light regulation does not solve the problem and helps creating congestion. It is proposed to separate traffic flows on different levels with the help of the overpass on Yaltinskaya, and the stream from Yaltinskaya to Severnaya goes on the overpass, and turning stream to Uralskaya - under the overpass. Traffic flows at the intersection on Severnaya and Turgeneva with traffic light regulation device can be diluted with a circular or a turbo intersection
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ANALYSIS OF QUALITY INDICATORS OF AUTOMATIC CONTROL SYSTEMS WITH NONLINEAR APPROXIMATION CONTROL LAW
DescriptionThe subject of research of this work was the study of the quality of control processes in a nonlinear automatic control system with an approximating the control law. In the known published works there are no results of such studies, which makes it difficult to synthesis a nonlinear control system for multimode objects in applied biotechnology, including technological objects of the agro-industrial complex. A comparative analysis of the quality of regulation in the transient and steady-state regimes is carried out. It is shown that the approximation method used for the synthesis of the nonlinear control law provides a linear dependencies in steady-state and close to them modes in combination with relay modes in transient regimes, which is a positive factor for improving the quality of regulation in multimode control systems. It does not necessary to determine the moments of switching the dependencies in the control law when changing modes
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Description
The analysis of models is carried out from a definition position for system of optimum control of drilling of basic mathematical model on which calculation of optimum regime parameters is possible. The main equation for management of process of drilling of wells is the mathematical model of mechanical speed of a driving as function from axial load of a chisel, the speed of rotation of a chisel and a consumption of boring solution for cleaning of a well of destroyed breed. Key parameter is axial load of a chisel; graphically dependence of speed of drilling on loading has S appearance - a figurative curve of Bingham which has a convex mathematical extremum. In the article, domestic and foreign models of drilling are considered; their schedules according to skilled data of conducting of wells are constructed. Models are sedate, i.e. reflect only a linear site of a curve of Bingham, data of trade drilling is well approximated with initial and linear sites of curves. Thus, on them it is possible to make only rational management of process, and the optimum mode exists only on border of range of definition of function. Only the A.A. Pogarsky model is suitable for optimum control, having a mathematical maximum and S-shaped form of a curve. All models depend on two parameters of management – load of a chisel and speeds of rotation of a chisel and don't consider the third on influence on drilling speed parameter - a consumption of boring solution. Therefore, Pogarsky's model was finished by inclusion in it in an explicit form of a consumption of boring solution. Check of model by means of the regression analysis of skilled data of drilling from official reports of drilling foremen showed its reliability for 71-99%. The model allows carrying out optimum control of drilling in the "axial load of a chisel" parameter
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Description
This article analyzes the boundary problem model of transport of binary electrolyte membrane systems in the approximation of Ohm's law. Different methods of solution are proposed
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Description
The work is done in scientific and practical directions for minimization of power losses in transmission of electricity to local distribution networks between the actors of the energy (producers and consumers) of energy-saving technologies focused on technological activities such as modernization and reconstruction of networks. Quite often in various circuits of power systems, it is advisable to transfer energy and its power through intermediate (transit) nodes. Structural changes in the electricity sector, at present, are mainly associated with the introduction of market relations between the subjects of energy exchange; therefore, in this work special attention is paid to the problem of calculating the power losses, as it is nonlinearly dependent on the power at the nodes and branches of a network. It should be noted that the nodes in problems transit capacity could be both sources and consumers. The latter necessitated the need for search of possible ways to reduce transportation losses of energy due to both the improvement and optimization of distribution networks and through the use of intermediate transit nodes. It follows that the transportation problem in this formulation is more General and expands the possibilities of optimization of power losses for the local subsystems of the energy clusters. The work is composed of the transport matrix for solving problems transit capacity, where the algorithm taking into account the distinctive features of which consist in the use of continuous numbering of sources and consumers in the matrix, and any node can be a transit country. The transit capacity ii-th node Zii=0, and the dimension of the matrix in contrast to the previously considered tasks has (n+m) (n+m) and it remains square as all the transport problems of linear programming. Transit variables Xii are included in the solution of the problem with a minus sign, and all transit variables are considered basic. From the above example in the work of a number of branches of a network is minimal, which significantly reduces the cost of building and maintaining the network, and the solver minimizes the power loss between the subjects of energy exchange and, as a result to savings from the standpoint of cost of construction of the network and the management of overflows of energy in it
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ANALYSIS AND EVALUATION OF COMPETITIVENESS FOR ENTERPRISES OF FOOD INDUSTRY
DescriptionThe article proposes a method of estimating grade rating of competitiveness of the food industry
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Description
The article is devoted to the analysis of the use of large data processing technology in information systems of territorially distributed complexes
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Description
In the article we have determined the dependence of the extreme mass of the counterweight from me-chanical drive parameters and chart movement of the executive body