Vol 7, No 1-4 (2013)
- Year: 2013
- Articles: 50
- URL: https://journal-vniispk.ru/2074-0530/issue/view/3752
Articles
The automized strength analysis of apparatuses with jackets
Abstract
The method and algorithm of the computer analysis tensely - the strain state of apparatuses with the jackets, belong to the class multiply connected shell constructions with a follow distinct path meridian was explain. Convergence on the software of the proposed method of calculation is result.
Izvestiya MGTU MAMI. 2013;7(1-4):7-13
7-13
Elasto-plastic calculation of tubular elements of constructions
Abstract
The method and algorithm of the computer analysis deflected mode of tubular elements of constructions in an elasto-plastic stage of operation was explained. Convergence on software implementation of the proposed method of calculation is present. It is instance calculation of tubular elements of the heat-exchange apparatus.
Izvestiya MGTU MAMI. 2013;7(1-4):13-18
13-18
18-25
Models of outcomes for receiving information codes which do not contain zero symbols
Abstract
Improvement of technological processes management information systems defines greater demands on the reliability of information systems, characterized by probabilities of outcomes receive information. In order to ensure high levels of reliability for long transmission there are widely used non-binary codes, which are actually pseudo-random sequences. Most preferred among them from the standpoint of immunity are codes not containing zero symbols. In this paper there are estimated the probabilities of outcomes of receiving information for the various models of communication channels with codes which do not contain zero symbols.
Izvestiya MGTU MAMI. 2013;7(1-4):25-30
25-30
Increasing of antijamming ability in digital transmission systems
Abstract
This article analyzes the advantage of application the principle of self-synchronization based on the dynamic memory devices. For increasing the immunity of networks a variant of the principle of self-synchronization using n-positional dynamic memory device is suggested.
Izvestiya MGTU MAMI. 2013;7(1-4):30-33
30-33
Environmental and economic aspects of processing and utilization of waste tires
Abstract
The article provides information about possible directions of use of worn-out tires, which accumulation and disposal are the major environmental problems. The main directions of waste tire usage are, the use of whole tires and pieces of tires, high-temperature destruction of worn-out tires, pyrolysis, the use of waste tires as fuel in the cement industry and to generate energy or heat, regenerate production process, getting the rubber crumb.
Izvestiya MGTU MAMI. 2013;7(1-4):34-40
34-40
Modification of the method of sequential simplex planning and its application to the solution of optimization problems
Abstract
A modification of the algorithm Nealder-Mida is proposed when the point, which determines the direction of reflection the “worst” node, is chosen based on the values of minimazed functions in the rest of the vertices of a simplex. There was investigated the efficiency of the proposed modifications on the test functions.
Izvestiya MGTU MAMI. 2013;7(1-4):40-48
40-48
Polymerization of the powder paints with the use of IR emitters with nanostructured ceramic coating
Abstract
Powder polymeric covering one of the most rapidly developing directions in painting and corrosion protection of industrial products, hardware, details of machines and aggregates. Therefore, the search for new energy-saving technologies of powder coating becomes particularly relevant.
Izvestiya MGTU MAMI. 2013;7(1-4):48-51
48-51
The direct method and algorithm of construction of splines of the third order in the control problems of drives performance movement
Abstract
When using predictions in the controling of the rotational motion arises the need to build a double-smooth trajectory passing through its previously measured key points. As piecewise polynomial curve, providing the desired smoothness, there is considered the interpolation by cubic splines that in the intervals between the nodes are actually the cubic parabola, continuously connecting the nodes with the degree of smoothness. When imposing additional boundary conditions, data splines minimize its total curvature.
Izvestiya MGTU MAMI. 2013;7(1-4):51-57
51-57
Mathematical software of an optimal control system of heat exchange object with dynamic parameters specified in algorithmic form
Abstract
The article considers technological object of the periodic action principle, which performes the heat exchange between a liquid medium and the refrigerant through the dividing wall of the cooling jacket. Heat exchange process occurs under conditions of natural convection. The optimal control problem is formulated based on the thermodynamics approach. It is shown that the solution must provide a minimum during the process of dissipative average losses. Mathematical and algorithmic maintenance to solve the problem is developed.
Izvestiya MGTU MAMI. 2013;7(1-4):59-64
59-64
Study of fuel composition influence on the radiative heat transfer in radiant tube furnace chamber
Abstract
There was performed a numerical studies on the basis of which the dependencies enabling one to assess the influence of the composition of the gaseous fuel, characteristics of burners, outside temperature of pipes and sizes of the radiant camera tubular furnaces of oil refineries on radiation heat transfer in combustion chamber during the change of chamber from natural gas to gaseous fuels of other structure.
Izvestiya MGTU MAMI. 2013;7(1-4):64-67
64-67
Investigation of the process of storm waste water treatment from oil
Abstract
The investigation of the process of stormwater treatment of waste water from oil was made. There are defined the degrees of purification at various initial concentrations of oil products. Empirical relationships for the degrees of purification of the installation separate stages were obtained. Also statistical analysis was made.
Izvestiya MGTU MAMI. 2013;7(1-4):67-72
67-72
Choice of optimal ways of protection of intellectual activity results in the field of engineering ecology
Abstract
The article considers the possible ways of protection of intellectual activity results in the field of environmental engineering. The main objects of protection, as well as corresponding legal institutions are defined. Gained results. Can be applied for all entities involved in the process of creation and commercialization of objects of intellectual property.
Izvestiya MGTU MAMI. 2013;7(1-4):72-75
72-75
75-79
Calculation of the purification process of carbon dioxide industrial gases
Abstract
Mathematical model of absorber for small volumes of cleared gases is proposed. There are made calculations of the basic dimensions for the pilot facility, calculation of the basic sizes of absorber for industrial installation, which showed the operability of the mathematical model for large-tonnage production.
Izvestiya MGTU MAMI. 2013;7(1-4):79-86
79-86
Calculation of the efficiency of catching drops in the axial centrifugal separators with the paddle swirlers
Abstract
Produced measurements have shown, that at calculation of the efficiency of separation of the dispersed phase in the axial centrifugal separators with the paddle swirlers it is required to consider the effect of three factors: deposition under the action of inertial forces, turbulent diffusion and the displacements of particles under the action of a non-zero radial component of the averaged velocity of the flow. In the case of small particles it can be considered the individual impact of these factors. Trapping efficiency mainly depends on the magnitude of the concentration of fine particles and their deposition rate in the near-wall zone. Each selected separator design meets the individual range of steady work, at which the minimum amount of ash is gained.
Izvestiya MGTU MAMI. 2013;7(1-4):86-89
86-89
The role of chromium in corrosion-electrochemical behavior of carbon steels
Abstract
In neutral (рН 7,55) and alkalescent (pH= 8,74) chloride-containing solutions there was examined the electrochemical corrosion behavior of carbon steel model containing up to 1,05 % Cr. It is shown that the chromium containing in carbon steel hampers their passivation, but microalloying it with titanium has a beneficial effect on their passivity and pitting resistance. The view is suggested that the observed effect of chromium and titanium on passivity and pitting resistance of low-alloy steels is connected with the change of the energy state of the surface of the metal.
Izvestiya MGTU MAMI. 2013;7(1-4):89-96
89-96
Simulation of crystallization kinetics and conjugate heat-mass transfer in gel medium
Abstract
This paper describes the features of zonal crystallization at high speeds of the process. Processes of heat release and change of the state of reagents in solution, associated with their high concentration, were taken into account. The kinetics of crystal growth in gel medium was investigated. The control algorithm for permeability of layer with precipitated solid phase was identified. The parameters defining the localization of the crystal growth were discussed. The possibility of forming an impermeable plug with specified location was shown. These results are of interest for the solution of certain medical problems associated with the controlled transport of drugs.
Izvestiya MGTU MAMI. 2013;7(1-4):96-103
96-103
The study of technological opportunities of the new sorbent microcrystalline calcium hydroxide
Abstract
In this article there was confirmed the possibility of obtaining domestic lime sorbent on the basis of the microcrystalline calcium hydroxide corresponding to their physical and chemical properties to the best foreign analogues. There were analyzed the parameters of the traditional technological process of lime slaking. In the laboratory conditions there was developed a damping technology, allowing to get the lime sorbent with large adsorption surface.
Izvestiya MGTU MAMI. 2013;7(1-4):103-106
103-106
Development of translucent fireproof structures and composition on the basis of epoxy oligomers
Abstract
There were developed compositions with epoxy matrixes for glutinous layers in multilayer fire-glass, providing a translucent building structures fire-resistance class E-60 I-45, in case there are three polymer layers. Using method ICS the chemical composition of resins and their curing chemistry with triethylenetetramine was found. Studying kinetics and the degree of cure there was selected a rational quantity of hardener.
Izvestiya MGTU MAMI. 2013;7(1-4):107-112
107-112
Investigation of the influence of the catalyst in the process of producing biodiesel using supercritical methanol
Abstract
The article discusses various ways to produce biodiesel fuel: in the presence of homogeneous catalysts, in the presence of heterogeneous catalysts, in supercritical methanol. There was experimentally confirmed that the process of obtaining methyl ethers of fatty acids (FAME) in the supercritical methanol on the selectivity, on replacement of the target product and process stability in time can compete with catalytic methods. There was studied the efficiency of the catalyst at the transesterification of rapeseed oil in supercritical methanol under the following process parameters: temperature of 300°C, the pressure of 300 atmospheres, the volume fraction of oil 0,5. There was evaluated that during the first hours after the filing of the reagents into the reactor in the presence of a catalyst TiO2/Ti concentration FAME in the oil layer of the reaction products is more than in not catalysed reaction. However, approximately one hour after the beginning of the process of catalytic activity was sharply reduced, and the output of the FAME becomes less, than without a catalyst. By means of mass-spectral analysis of the product, extracted from the surface of the catalyst, it is discovered a tumor in the process of interesterification low-volatile and poorly soluble substances, blocking the active centres of the catalyst. In addition, the reduction in catalytic activity became the result of partial destruction of the surface layer of TiO2. It is established, that the washing of the spent catalyst mixture of solvents with the subsequent heating at 350°C allows largely to restore the activity of the catalyst.
Izvestiya MGTU MAMI. 2013;7(1-4):112-119
112-119
Leaching of non-ferrous metals from metallurgical slag by ferric sulfate solutions produced by bio-oxidation
Abstract
The paper presents the results of a study of leaching of copper, nickel, cobalt and iron from metallurgical slag. It is shown that ferric sulfate solutions produced during the oxidation of bivalent iron by associations of acidophilic chemolithotrophic bacteria, adequately allowed to transfer non-ferrous metals into the liquid phase in 1 hour at a temperature of 70 º C. Thus the extraction of copper reached 90%, nickel - 88%, cobalt - 67% and extraction of iron into a solution was about 30%.
Izvestiya MGTU MAMI. 2013;7(1-4):119-123
119-123
Technique for recognition of aircrafts and radar traps in the control circuit of airspace control system based on neural network technology
Abstract
The paper proposes a method for building of automatic recognizers of aircrafts on a set of radar measurements based on the cascade of multilayer feedforward neural networks. The practical application of this technique in recognizing of three types of aircraft is presented as well.
Izvestiya MGTU MAMI. 2013;7(1-4):124-130
124-130
130-133
134-138
Energy state of a surface of carbon steels as a characteristic of their corrosion resistance
Abstract
The state of various areas of the surface of a test melt of carbon steel containing 0,2% of carbon and 0,75% of chrome was analyzed by means of methods of energy-dispersive analysis and scanning tunneling micro- and spectroscopy. Without corrosion-active sulfide inclusions, the local corrosion spots are inert chromium carbides and oxides of aluminum. Spots of localized corrosion occur in places where above mentioned carbides and oxides brake the surface due to accelerated etching of the metal/inclusion boundary, where are seen a rapid increase of the tunneling activity.
Izvestiya MGTU MAMI. 2013;7(1-4):138-142
138-142
Development of rapid diagnostics and prediction of residual life based on detection of accumulated damage of metal structure during sustained loading
Abstract
In the article there are considered the basic principles of the method of rapid diagnostics on the basis of microindentation allowing to register the dynamics of accumulation of scattered damage in a wall of a structure in the sustained loading and predict the residual life.
Izvestiya MGTU MAMI. 2013;7(1-4):142-148
142-148
Features of corrosion-mechanical failure of gas and oil pipelines
Abstract
The paper considers the kinetics of stress-corrosion defects in the initial stages of destruction. The authors described stress-corrosion damage of pipelines that are in similar conditions to the external environment with different design parameters and operating modes. There are identified two stages of progress of stress-corrosion defects in relation to the influence of different groups of factors. It is shown that in the metal surface layer of walls of a pipeline under designed pressure there are conditions for destruction due to corrosion cracking under stress.
Izvestiya MGTU MAMI. 2013;7(1-4):148-154
148-154
PI System and Labview integration
Abstract
In this article it is considered the questions of integration of Plant Information System (PI System) with Labview graphical programming language. Mechanisms of interaction between the systems are considered. Examples of a program code are given.
Izvestiya MGTU MAMI. 2013;7(1-4):155-160
155-160
Quality model of stable catalyzate on the unit of catalytic reforming of gasoline
Abstract
In this article the authors consider questions of development of a quality model of stable catalyzate on the unit of catalytic reforming of gasoline. The approach to collection and preprocessing of technological information is considered. Results of simulation for octane number of stable catalyzate are given. Comparing of results of simulation and laboratory data is made.
Izvestiya MGTU MAMI. 2013;7(1-4):160-164
160-164
165-171
171-176
Nonlocal approach to thermodynamics of mixtures
Abstract
The paper examines the highlights of mixture theory on the basis of generalized nonlocal (discrete) thermodynamics that involves Shannon entropy. Generalization of the equilibrium thermodynamics is obtained basing on the hypothesis of quantized entropy. The paper defines the elemental macroscopic thermodynamics space that serves as the basis of the mixture theory. The theory allows to use generalized thermodynamic method instead of empirical equations including laws of Raul and Dalton.
Izvestiya MGTU MAMI. 2013;7(1-4):176-181
176-181
Archiving module for data backup and storage
Abstract
The paper describes an archiving module that provides data backup and storage describing modeling objects and data about the process of modeling of technically complex objects in real time, without interrupting the modeling complex and rebooting a computer. The backup schedule option is implemented to minimize the human impact on the data safety.
Izvestiya MGTU MAMI. 2013;7(1-4):181-186
181-186
Preparation module for models of components of systems and technical processes of thermohydraulic cluster
Abstract
The paper describes the functioning of system elements and technological processes of heat hydraulic cluster. The development objective is to create a universal tool for the preparation and functioning of computational models for clients which allow working simultaneously with three-dimensional schemes, functional diagrams and visual programming elements.
Izvestiya MGTU MAMI. 2013;7(1-4):186-196
186-196
Intensification of fuel combustion process and reducing emissions on application of anti-wear additive
Abstract
The article considers a problem of reducing emissions of fuel equipment on the application of a magnetic anti-wear additive which is produced using nanotechnology, which makes it possible to obtain lubricating fluid with low coefficient of friction, having metal cladding effect. Continuous layer of magnetic particles on a surface makes it possible not only to reduce the shear stress in the surface layer, but simultaneously reduce the gap between the mating surfaces, providing the reducing of coefficient of friction and more complete combustion.
Izvestiya MGTU MAMI. 2013;7(1-4):196-198
196-198
199-202
Mass transfer in electro-membrane separation of water systems
Abstract
The article presents the results of mass transfer characteristics of electro-membrane systems. It is also shown the influence of hydraulic properties, experimental cell constructive parameters and initial concentration on mass transfer coefficient.
Izvestiya MGTU MAMI. 2013;7(1-4):202-206
202-206
Increasing the reliability of technological equipment of waste processing plants
Abstract
In the paper, using the methods of reliability theory and calculus of variations was posed and solved the problem of increasing the efficiency of industrial equipment at enterprises on processing of solid household waste. An experimental base for research was the actual operating time to failure of machines and equipment of existing waste treatment plants of Moscow. Results allow to choose the operating modes corresponding to maximum reliability of the equipment.
Izvestiya MGTU MAMI. 2013;7(1-4):206-216
206-216
217-236
Methods of intensification of the process of heat and mass transfer in column apparatus with contact devices
Abstract
The article gives a classification of intensification the methods of heat- and mass transfer. There are examined some advantages and disadvantages of nozzle and poppet pin devices. The method of influence analysis of nozzle form and construction on heat-, mass transfer process is provided. There is also described the effect of different parameters on the choice of the design of the nozzle. In article there were compared the most common in industry types of bulk and regular nozzles. An alternative method of intensification of heat and mass transfer finally was proposed.
Izvestiya MGTU MAMI. 2013;7(1-4):237-242
237-242
242-246
The study of electro-optical and optical-electronic systems of motor vehicles
Abstract
The modern level of electro-optic technology development makes it technically and economically feasible to use them in the motor vehicles and allows it to achieve significantly better results than when choosing conventional solutions. Rapid progress in this field requires operational research on specific systems and components that can be used with the use of laboratory stands running LabVIEW.
Izvestiya MGTU MAMI. 2013;7(1-4):246-251
246-251
Thermal effect at impact of a drop with a highly heated wall
Abstract
The article gives the solution of the problem of heat transfer to the droplet colliding with the highly heated wall. Analytically was found the expression of thermal effect of a drop single interaction with the wall. The problem is important when calculating the cooling processes in cryogenic equipment, heat removal of the nuclear power and hardening processes in metal working.
Izvestiya MGTU MAMI. 2013;7(1-4):252-254
252-254
255-259
259-265
263-266
266-268
Decision support system for supplier selection in supply chain
Abstract
Designed fuzzy logic algorithm and software and information management decision support system for the rational choice of supplier in the supply chain by using the analytic hierarchy process (AHP) and the operations of the theory of fuzzy sets. The functioning of the DSS has been verified experimentally on real accounting and statistics. The results of numerical experiments confirmed the effectiveness of the proposed algorithm for the adoption of logistics management solutions.
Izvestiya MGTU MAMI. 2013;7(1-4):268-271
268-271
Search of technical factors of the liquid submerged cultivation process of the mycoprotein strain
Abstract
In this article was made determination of technical factors of the liquid submerged cultivation process of the mycoprotein strain Fusarium sambucinum D-104. Effect of pH-control on the growth of mycelium and the production of protein substances in a wide pH range has been revealed.
Izvestiya MGTU MAMI. 2013;7(1-4):271-277
271-277