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The subscription index of catalogue
“Russia press” - 18945 semi-annual,
15621 – annual.
It is issued in February 2004.
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Mechanical engineering and engineering science
G.V. Serga, E.A. Khvostik.
EQUIPMENT BASED ON SCREW ROTORS IN MECHANICAL ENGINEER
In the paper there is presented equipment based on screw rotor where the design of a work chamber allows carrying out mass oscillations of charging (work pieces and particle of work environment) with higher amplitude of displacement (10…1000mm and more) for finish-cleaning and strengthening processing. There is offered a standard diagram of the machine for finish-cleaning parts in a continuous flow (at that the term of pressed parts working does not exceed 1.7min. The analytical dependences for the definition of the part stirring rate in a machine from charging up to unloading are shown
Key words: screw rotors, work pieces, particles of working environment, oscillations
MS.L. Leonov, A.M. Ikonnikov, R.V. Grebennikov.
GRAIN EQUILIBRIUM STATE RESEARCH OF MAGNETO-ABRASIVE POWDER
Increasing requirements to parts surfaces cause the necessity to improve and create new methods of finishing which magneto-abrasive working belongs to. Depending on the size and magnetic induction distribu-tion ferromagnetic mass will be distributed somehow in a working solution. Having the values of magnetic forces it is possible to define the grain location of a magneto-abrasive powder at the equilibrium state.
It is well-known that the computation complexi-ty of magnetic forces affecting grains within a working solution is intensified with that they are different in form and size. Magnetic forces affecting the grains of ferromagnetic powder during magnetic-abrasive work-ing are computed through the finite element method in the Ansys environment. In this research a flat problem is being solved, a continuum homogeneous in density and magnetic properties is divided into separate grains. At the same time there is accepted an assumption that the grains of a ferromagnetic powder are ordered and ball-shaped. The values are obtained of all magnetic forces affecting all grains of a ferromagnetic powder located in a working gap at equilibrium.
Mechanical forces affecting the grains of a fer-romagnetic powder are computed on the basis of grain equilibrium condition under magnetic force impact. At the mechanical force computation through the finite element method at the points of ferromagnetic powder grain contact there are formed stresses tending to infin-ity. Therefore for the computation of mechanical forces between grains of a magnetic powder it is necessary to solve a problem of static equilibrium. In contrast to the finite element method such a method of computation allows neglecting stresses arising at a point contact of powder grains at the state of equilibrium.
As a total of this problem solution will be the definition of grain configuration in a ferromagnetic powder at the state static equilibrium.
Key words: magnetic-abrasive working, grain equilibrium, static system of forces, magnetic force, contact force, me-chanical force
G.F. Mukhametzyanova, M.S. Kolesnikov, I.R. Mukhametzyanov.
THERMODYNAMIC REGULARITIES IN CAST IRON STRUCTURE FORMATION AT CENTRIFUGATION, MODIFICATION AND DIFFERENT CONDICTIONS OF MELT CRYSTALLIZATION
Mainly the structure and properties of cast iron melts are connected with carbon heterogeneous distri-bution. According to this theory in local capacities of iron-carbon melts the carbon clusters having an arena origin and consisting of benzene rings of ÑmFe are formed. Such clusters at melt cooling by means of spi-nodal decomposition form intermediate pseudo-carbide phases turning into graphite. But there is no common opinion (consensus) regarding a structure of initial intermediate crystal-chemical formations. In the opinion of A. Wertman and A. Samarin carbon with concentrations exceeding 2% is in melts at temperatures 1400-1450ºC as a graphite package.
In this paper on the basis of the experimental data obtained at melt centrifugation of hypoeutectic and hypercutectic cast iron and the analysis of thermo-dynamic regularities of a structure formation at crystallization there is offered the most likely concept of a germ formation and kinetics of graphite deposition from the melt. It is defined that in hy-poeutectic cast irons higher liquidus temperature a cast iron melt is a homogeneous solution.
In two-phase area below the liquidus tempera-ture graphite depositions from the melt are not ob-served, but austenite with an alternating carbon composition is evolved. In hypercutectic cast irons in the course of cooling from the melt as an initial phase is evolved cementite with carbon content 6.67% with an orthorhombic lattice, then cementite being saturated with carbon turns into ɛ-phase of (Fe2,4C) type with a hexagonal lattice which is a substrate for graphite formation. Modifiers (La, Ce, Mg, ÐÇÌ) being adsorbed on a plane with lower energy (0001) and (10 1̅ 0) of the ɛ-phase result in their growth blocking, and at the expense of the free energy decrease graphite globuling occurs. It is defined that at the centrifugation of cast iron melts as a result of the considerable redistribution of all elements dissolved in them a purification from admixtures (sulfur, phosphorus and others) which allows obtaining a cast iron structure with globular graphite without modifier use. On this basis there is developed a technology for manufacturing axisymmetric composite castings for slider bearings.
Key words: high-duty cast iron, cast iron structure formation, globular graphite, modification, centrifugation, melt crystallization, fluctuation, diffusion
V.A. Poletaev, A.M. Vlasov.
INVESTIGATIONS OF MAGNETIC FIELD CONCENTRATOR FORM IMPACT UPON OPERATION CHARACTERISTICS OF MAGNETIC FLUID SEALER
Magnetic fluid sealers (MFS) belong to contact-less groove seals which operate according to the prin-ciple of a hydraulic gap in which a magnetic fluid is held by a magnetic field in working gaps between mat-ing parts.
A pole configuration and correlations of work-ing gap dimensions affect MFS operation characteris-tics where friction loss belongs to the main ones. When choosing an optimum configuration of a pole and di-mensions of a working gap it is necessary to strive for friction loss decrease in MFS.
The role of an area on a concentrator point of the magnetic field (tooth) is not studied enough at pre-sent. In this work there is specified a problem to inves-tigate a topicality of an area fulfillment on the concen-trator point of the magnetic field, an area impact upon this magnetic field and a holding capacity of the MFS working gap.
The problem specified was solved through the simulation method of the magnetic field in the MFS working gap. A finite element method was used. During the computation there were taken into account non-linear properties of tooth material.
The formation of an area on the tooth point re-sults in the equalization of the field density in the field of a minimum gap
Key words: magnetic fluid sealer, magnetic field concentrator, stress distribution, working gap
V.A. Logvin, I.V. Tereshko, S.A. Sheptunov.
CHANGE OF α-Fe DISLOCATION STRUCTURE CAUSED BY GLOW
The purpose of this work consists in the investi-gation of a dislocation structure by the example of low defective materials under the impact of glow discharge plasma with the purpose of the development of new methods, technologies and automated devices for the creation of automated technological environment.
To solve the problem specified there were cho-sen samples from α-Fe of 10mm thick which were sub-jected to annealing. To carry out the researches there was used transmission electron microscopy, raster elec-tron microscopy and an X-ray structural analysis.
It is defined experimentally that regularities in the formation of complex dislocation substructures after the impact of glowing discharge plasma are close to those ones which are observed at different kinds of plastic deformation. As in our case a plastic defor-mation does not occur then the results obtained confirm the hypothesis of that the value of scalar density of dislocations is a basic parameter having under control the formation of complex dislocation structures. A distinguishing peculiarity of dislocation structures observed at the impact of glowing discharge plasma is a high density of dislocation loops. The attention is drawn to the fact that dislocation loops are observed in α-Fe with low density of dislocations. The fact itself of dislocation loop presence (or absence) is rather significant for the clarification of the origin of substructure formation at the impact of glow discharge. The presence of loops may witness of the significant role of point defects
Key words: : plasma, glow discharge, dislocation structure, automated processing environment, vacuum plants
A.A. Kulkov, V.E. Inozemtsev.
METAL SURFACE SUPERSONIC LIQUID MATTING
Metal surface matting is carried out as a rule by free abrasives in dry or liquid environment. This opera-tion is used mainly at finishing to obtain required ergo-nomic indices of machine element surfaces contacting a man during work processes, or to obtain decorative engravings and drawings. Sometimes matting is used as a pre-coating operation. In the paper there are shown results of the investigations of some technological mat-ting mode impact upon properties of a surface ob-tained
Key words: : processing with free abrasive, surface roughness, matting
S.V. Eliseev, R.S. Bolshakov, A.V. Nikolaev.
APPROACH DEVELOPMENT IN PROBLEMS OF PROCESSING MACHINE AND VEHICLE DYNAMICS AT VIBRATION LOADINGS
Methodological positions in the problems of the dynamic state assessment in mechanical oscillating systems through the definition of dynamic reactions in joints of system elements are under development.
The possibilities of dynamic property changes in vehicle suspension systems at device introduction for motion transformation are under consideration.
The research purpose consists in the develop-ment of a method for simulator formations to deter-mine and estimate of dynamic reactions arising be-tween system elements at external impacts.
The approaches based on an analytical appa-ratus of the theory of automated control are used. íûå íà àíàëèòè÷åñêîì àïïàðàòå òåîðèè àâòîìàòè÷åñêî-ãî óïðàâëåíèÿ. Transfer functions are used for the estimate of dynamic properties.
A technology for the definition and assessment of dynamic reactions arising in the system at the simul-taneous joint action of external disturbances is devel-oped.
It is shown that the introduction of additional ties in the system results in the occurrence of new dy-namic effects which are realized as additional modes of oscillation dynamic extinguishing.
There is offered a number of new criteria for the assessment of system dynamic properties on the basis of the correlation use of dynamic reactions of ties in the points of suspension element contacts.
A technology of structural transformations in the initial simulator with the emphasis on the object a dynamic state of which is assessed as a separate ele-ment of an integrating type with the reverse negative circuit in the physical sense corresponding to the shown dynamic rigidity forming a dynamic reaction is offered.
Key words: dynamic reaction, dynamic rigidity, transfer function, oscillation dynamic extinguishing
Informatics, computer engineering and management
I.S. Vasendina, L.V. Abramova, A.T.Guriev, M.I. Korzina, K.V. Shoshina.
APPLICATION OF KNOWLEDGE ON SUBJECT FIELD AT IDENTIFICATION
AND DESCRIPTION OF OBJECTS OF NORTHERN ECOSYSTEM PRESENTATION
The paper reports the application of knowledge on a subject field as an additional one at the identifica-tion and description of objects of the northern ecosys-tem images. There is shown an analysis of existing methods for identification and description of image objects. The limitations of their use for the decryption of thorough images obtained from unmanned aerial vehicles are described. The additional knowledge on the subject field to increase the amount of information obtained at identification is offered. A generalized scheme of the knowledge system in the course of im-age decryption including a model of the subject field as declarative knowledge is presented. A process of image object identification with the use of a knowledge sys-tem is described.
Key words: object identification, knowledge system, declarative knowledge, model of subject field, northern ecosystem
Economics and production management
D.V. Erokhin, A.A. Karitskaya, A.S. Novikov.
ADVERTISING AS ECONOMIC AND LEGAL RESOURCES:
KEY FEATURES AND COMPLEX OF RIGHTS
The dual nature of information is grounded. The place of information in the system of factors of production is analyzed. The economic-legal characteristics of advertising as a kind of information are estimated. The question of the moment of capitalization of the economic potential of information is considered
Key words: factors of production, information, advertising, targeting, unfair competition
BARRIERS IN SMALL-SCALE AND MEDIUM BUSINESS CREDITING
Small-scale and medium enterprise (SME) makes a basis for innovations. An innovation eco-system in the Russian federation develops constantly, but during the latest years according to different indi-ces manifesting its state there is no growth in compari-son with the general situation in the world.
According to data of the Global Innovation In-dex, and also to the investigations carried out by the “Russia Support” company and “Promsvyazbank” there is observed a situation in which all businessmen experience difficulties in the matter of crediting their business, in particular, in commercial banks. In spite of the presence of powerful federal programs supporting SME and also a number of regional programs there is no considerable progress in the situation improvement in the field of crediting which is partly explained by the policy of the Central Bank.
For the estimate of barriers in small-scale and medium innovation enterprise crediting there was formed a base economic-mathematical model showing a degree of SME crediting depending on crediting company potentialities and a SME state in the region, and also an auxiliary model taking into account regional peculiarities of an innovation eco-system. As a result it was defined that a high level of science development in the region expressed with such indices as an amount of patents granted and a staff size engaged in scientific researches and developments increases SME crediting, but indices characterizing innovation activities of enterprises do not affect considerably the extent of crediting given to SME in the region.
As a measure to surmount obstacles in SME crediting it is offered to the state institutions of devel-opment to guarantee banks for crediting projects significant for large-scale business instead of financing a great number of uncertain startups and also to the largest companies to be such guarantors by means of an offer extension for a purchase of the produce of innovation SME.
Key words: innovation enterprise, SME, barriers in crediting, small-scale business, medium business, regression analysis
E.N. Strizhakova, D.V. Strizhakov, I.A. Kuzovleva.
INSTITUTES OF INDUSTRIAL POLICY IN RUSSIAN FEDERATION
The existing directions of the state economic policy are analyzed, their impact on the country's in-dustry is shown. Specialized institutes of industrial pol-icy are considered in detail. The analysis of the Federal Law of December 31, 2014 No. 488-FZ "On industrial policy in the Russian Federation", outlines the main determinants of the development of the industry of the country
Key words: industrial policy, institutions, management tools, mechanisms, public administration, federal law, system effectiveness
V.G. Gamaonov, E.G. Olisaev.
STAFF SELECTION PROBLEM FORMALIZATION USING SYSTEM APPROACH
The purpose of this work consists in the formu-lation and solution of the staff selection problem in a generalized system setting as a problem of a vacant unit replacement of the system – local field which is formed in the system as a result of leaving a certain element that results in the malfunction of the system and arising contradictions between the system and environment (meta-system). Staff selection is an example of vacant unit replacement, when as a system is considered a certain company where there is a vacant post for the replacement of which a suitable candidate is chosen from the specified majority of contestants.
With regard to that person’s functional charac-teristics according to which candidates selection is car-ried out are inaccessible for the direct measurement, but are derivatives of individual characteristics (per-sonal, professional and so on), for the definition of which there are developed a lot of standard methods and procedures one offers to introduce into considera-tion a certain sort of an operator transforming person’s properties into person’s functional characteristics. As person’s characteristic are relatively constant, then for the account of peculiarities of the given position and the assessment of values of functional properties re-quired the “adjustment” of the operator mentioned is carried out.
The model developed allows decreasing the subjective factor impact at staff recruitment therefore it may be recommended for the application both in authorities, management institutions and in the work of personnel departments of companies.
Key words: staff recruitment, system approach, vacant unit, simulator, multi-criterion choice
O.G. Turovets, V.N. Rodionova. ORGANIZATIONAL FACTORS IN SUPPORT OF PRODUCTION
The purpose of this work consists in the investi-gation of organizational aspects of production system flexibility support, a scientific problem is organization-al solution development on production system flexibil-ity support, the identification of key components in organizational flexibility and development of methodi-cal approaches to production system assessments.
There is offered a typology of organizational solutions on the formation of flexible production systems. A complex approach is used to the estimate of production system flexibility taking into account basic factors and characteristics of the organizational flexibility and allowing the definition of measures to ensure production system flexibility.
There is presented a meaningful characteristic of kinds and forms of production system flexibility manifestation. Key components in organizational flexibility are emphasized, such as: production organization flexibility, process control flexibility, staff flexibility. The necessity and possibility of a step-by-step transition to a flexible automated production are substantiated. The process of organizational development at the transition to a flexible production is under thorough consideration.
The realization of the offered approach to the development of organizational solutions on the support of a flexible production system will allow carrying out the development and realization of the stages of the transition to a flexible automated production and realization of the principles of an intelligent enterprise
Key words: production system, organizational flexibility, systematization, standard solutions
FORMATION OF INFRASTRUCTURE COMPONENT COMPOSITION
FOR REGIONAL INNOVATION SUBSYSTEM
The paper reports the analysis of the infrastruc-ture component composition formation for the regional innovation subsystem.
It is noted that one of the significant mecha-nisms of the regional innovation system interaction and integration into a national innovation space is a creation of infrastructure which functioning upon depends GRP growth both in the region and in the country as a whole. The procedure developed by a Higher School of Economy (subject innovation development rating) which allows defining a Russian regional innovation index (RRII) is under consideration.
A basic direction for the improvement of re-gional innovation activity is a formation of the efficient element composition of the innovation infrastructure.
For the balanced spatial development of Russia a modern infrastructure is urgent. The author empha-sizes the following its component composition: materi-al and technical, sale, information and consultation, financial, staff, regulatory and legal elements. The principles of RIS infrastructure functioning are shown.
There are offered measures directed to the infrastructure functioning level increase of the regional innovation subsystem.
Key words: region, regional innovation subsystem, spatial development, infrastructure, RIE, component compo-sition, function principles