Vol 2, No 1 (2003)

Full Issue

AIRCRAFT AND SPACE ROCKET ENGINEERING
DYNAMIC PROCESSES IN ROCKET - SPACE SYSTEMS
Anshakov G.P., Aslanov V.S., Balakin V.L., Doroshin A.V., Kvashin A.S., Kruglov G.Y., Yudintsev V.V.
Abstract

Dynamic processes in rocket - space systems such as rocket carriers and side blocks, small re-entry capsules with double rotation, also in auxiliary elements such as separation systems, solar batteries and antennas aperture systems (both with and without taking into account suspension elasticity) are discussed. Mathematical motion models are developed, dynamic processes are analyzed and parameters are synthesized in side blocks separation systems, in head fairing of rocket carrier and in solar battery panels. Re-entry capsule with double rotation is treated as a mechanical system of co-axial bodies with variable mass, having linear regularities of change of mass and moments of inertia.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):7-23
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STRUCTURE STIFFENING BY TOPOLOGICAL CHANGES
Komarov V.A.
Abstract

Enhancement of structure stiffness characteristics due to the addition of new elements is considered. Theoretical analysis of heuristic actions of a designer faced with this kind of problem is given. Formalized algorithm for the search of additional elements is proposed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):24-37
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COMPUTING VORTICITY DIFFUSION WITH A MODIFIED "DONOR-ACCEPTOR" SCHEME AND THE INTEGRATION OF THE SCHEME INTO THE "VORTEX-IN-CELL" METHOD
Nikonov V.V., Shakhov V.G.
Abstract

A modernised scheme of splitting Navier-Stokes equations for the numerical method of "vortex-in-cell" is proposed. The method consists in introducing a minor parameter proportional to kinematic viscosity into the scheme. It allows finding the solution of the problem in the form of asymptotic series. An advection-diffusion problem of the Lamb-Ozeen vortex is considered for the verification of the proposed method. Computation results obtained by "donor-acceptor" (D-A) and MD-A methods are compared with an analytical solution of the advection-diffusion problem. The MD-A method is shown to be more suitable for low viscosity flow simulation. Unlike the D-A method, the MD-A method remains accurate in a wide range of space and time resolution.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):38-46
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AUTOMATED CARGO ACCOMMODATION ABOARD TRANSPORT SPACE VEHICLES
Shulepov A.I., Gavrilov V.N., Miatishkin G.V.
Abstract
Problems associated with the accommodation of cargo aboard transport space vehicles are dealt with.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):47-49
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TECHNICAL SCIENCES
INFLUENCE OF SCALE FACTOR ON THE FORMATION OF RESIDUAL STRESSES IN CASE OF THERMOPLASTIC STRENGTHENING
Barvinok V.A., Vishnyakov M.A.
Abstract
The paper presents the main stages of calculating residual stresses developing during thermoplastic strengthening in parts like compressor blades. It also shows the results of investigating scale factor influence on the possibility of developing favorable stressed state in their surface layer. It has been found that blades with profile thickness h > 2 mm are easily strengthened in the above mentioned way. For thermal strengthening of thin blades (h = 0,5... 1,5 mm) we suggest using additionally a special elastic metal tank. The efficiency of its use is justified by the results of residual stress calculating.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):50-55
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REDUCTION OF TURBO-PUMP UNIT VIBRATION BY REGULATING BEARING RIGIDITY
Beloussov A.I., Balyakin V.B., Lulev A.I.
Abstract

The paper discusses a multi-mass dynamic model "rotor-bearing-housing-basement" of a turbo-pump unit. The possibility of reducing vibro-velocity on the turbo-pump unit housing and the rotor oscillation amplitude due to changing bearing rigidity by longitudinal compression of an annular bearing is shown.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):56-61
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STRAIN DEFORMED STATE IN TURBINE DISC GROOVES UNDER THEIR THERMOSTRENGTHENING
Vishniakov M.A.
Abstract

The paper presents the procedure and results of thermal stress state analysis in a turbine disc herringbone groove when it is subjected to thermoplastic strengthening. The thermoplastic strengthening method is found to create a propitious field of compression residual stress in a superficial layer of a part of any geometry complexity.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):62-67
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MATHEMATICAL MODEL OF HIGH-TEMPERATURE GAS DEVICE
Volov D.B.
Abstract

Mathematical model of a high-temperature compression device that allows quantitative d escription of the compression process in the installation has been developed. It can also be used to determine the optimal operation mode, to calculate the parameters of newly designed devices and to look for ways of radiation heat exchange intensification in ballistic plasmatrons. Numerical calculations of gas parameters in a high-temperature compression installation used for solid-state laser pumping have been performed. The results obtained are in agreement with the experimental data. They permit quantitative description of the compression and radiation process in the installation.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):68-73
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OPTOELECTRONIC DISCRETE PHASE METHOD FOR THE DETERMINATION OF TURBINE BLADE
Danilin A.I.
Abstract

The paper describes the optoelectronic discrete phase method for measuring deformation of blades of rotating bladed-disc assemblies of turbomachines. Advantages and disadvantages of different versions of optoelectronic discrete phase method realization are dealt with. Acriterion relating parameters of the reflecting surface to the radiator wavelength and making it possible to formulate the conditions necessary for the implementation of the method is introduced. Several circuit diagrams of devices for the realization of the method are presented.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):74-81
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ANALYSIS OF NON-BAR BACK PULL DRAWING FOR THIN-WALLED TUBES
Kargin V.R., Shokova E.V., Kargin B.V.
Abstract

Theoretical study of a non-bar back pull drawing process for thin-walled tubes has been carried out. A complete set of equations is given permitting the determination of both stress and deformation fields required for the proper selection of drawing parameter and the tool to be used.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):82-85
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MATHEMATICAL FOUNDATIONS FOR DEVELOPING TECHNOLOGICAL PROCESSES OF MOUNTING AIRCRAFT ELECTRICAL EQUIPMENT
Koptev A.N., Koptev V.A.
Abstract

The theoretical foundations for developing technological processes of mounting airborne electrical equipment are presented.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):86-93
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STRUCTURE AND PROPERTIES OF ANNEALED AND TEMPERED STEEL AFTER RAPID ELECTROTHERMAL PROCESSING
Maltsev I.M.
Abstract

The structure and properties of steel 25 after heating it with high-density pulse current for hardening, the influence of cooling speed and high tempering on the stability of properties have been investigated.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):94-100
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CONTROLLING THICKNESS DIFFERENCES OF HOLLOW PIECES BY PLASTIC TOOLS
Moisseyes V.K., Komarov A.D., Sharov A.A.
Abstract

Devices for controlling wall thickness of hollow pieces have been designed and patented. Thickness is increased due to wave pressure of surplus material by an elastic tool. A mathematical model of material redistribution and simple dependences for practical use have been proposed. The results of experimental investigations are given.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):101-105
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DETERMINING GEOMETRICAL PARAMETERS OF CENTRIPETAL MICROTURBINE NOZZLE CONSISTING OF RECTILINEAR BLADES
Mussatkin N.F., Radko V.M., Balakhonov A.D.
Abstract
A procedure for determining structural geometrical parameters of nozzle blade profiles on the basis of the results of gas-dynamic calculation of a stage of a radial centripetal microturbine is presented.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):106-110
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PROCEDURE OF ESTIMATING PROBABILITY OF PIPELINE SYSTEM RELIABLE OPERATION
Tarassov J.L., Perov S.N., Logvinov S.L.
Abstract

Scientific departments and laboratories of Samara State Aerospace University have wide experience in ensuring reliability and defining safe life expectancy of aircraft structural elements. The paper provides the description of the procedure of estimating probability of reliable operation of different purpose pipeline systems. Measures permitting considerable reduction of operation loads and increase of reliability and durability are also described.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):111-119
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INFLUENCE OF REPEATED HEATING ON MECHANICAL AND TECHNOLOGICAL PROPERTIES OF SHEET ALUMINIUM ALLOY WITH A HIGH CONTENT OF MAGNESIUM
Uvarov V.V., Nosova Y.A., Uvarova V.S.
Abstract

A complex study of mechanical and technological properties of sheet items of deformable high-magnesium aluminium alloy is carried out. The possibility of its use for manufacturing aircraft and automobile products is estimated.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):120-122
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DIGITAL SPECKLE INTERFEROMETER FOR THE INVESTIGATION OF VIBRATION CHARACTERISTICS OF OBJECTS EXCITED SIMULTANEOUSLY AT SEVERAL FREQUENCIES
Shorin V.P., Elenevsky D.S., Zhouravlev O.A., Komarov S.Y., Shaposhnikov Y.N., Shcheglov Y.D.
Abstract

The paper deals with the problems to be solved for the creation of a digital speckle interferometer that makes it possible to study vibration of mechanical elements excited simultaneously at several frequencies. The method of registering specklograms has been developed on the basis of methods of holography and speckle-interferometery. Separate spectral components of surface oscillations in case of broadband object stimulation are shown. The method developed is based on time modulation of laser beams in the interferometer.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):123-129
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PHYSICS AND MATHEMATICS
LINEAR ANALYSIS OF MATERIAL LAYER STATIONARY SEPARATION
Glagolev V.V.
Abstract

Characteristics of a stationary p rocess of directional separation have been constructed on the basis of thermomechanical analysis, their interrelation with the known destruction criteria has been established.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):130-135
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ONLY A FEW PROJECTIONS COMPUTED TOMOGRAPHY IN A PHYSICAL EXPERIMENT
Filonin O.V.
Abstract

Methods, algorithms and examples of equipment realization of only a few projections 2D and 3D tomographic diagnostics of physical object parameters with reference to laboratory studies are presented. In particular, methods and algorithms of diagnostics of high-temperature plasma and plasma flows are described, results of investigating spatial distribution of admixtures in fires, examples of restructuring composite materials are presented.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):136-145
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CYBERNETICS AND INFORMATION SCIENCE
AUTOMATED COMPLEX OF PROCESSING TELEMETRY INFORMATION
Kuzin V.A., Atamanchuk Y.I., Kravchuk N.V., Shibanov A.P., Shibanov V.A.
Abstract

Automated complex of processing telemetry information is realized on the basis of a local network. Customer computers of the testers functioning in parallel are connected to the processing server on the basis of socket technology. Mathematical methods and graphic models for defining the time of executing standard jobs of telemetry information processing are proposed. A simulation model for the analysis of telemetry information processing system productivity has been developed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):146-153
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ANALOG-TO-DIGITAL APPROXIMATION CONVERTERS WITH THE OPTIMUM PROCEDURE OF CODE SELECTION
Khrissanov N.N.
Abstract

Method of increasing the speed of analog-to-digital approximation converters due to the use of optimum search strategies is considered.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):154-161
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HUMANITIES
THE DEVELOPMENT AND REALISING OF ECONOMIC STIMULATION IN INTRACOMPANY MECHANISMS OF MANAGING ENTERPRISES
Korotnev G.I., Zaskanov V.G.
Abstract

The aggregate of economic stimulation mathematical models is suggested, which allows setting and solving tasks of analysis and synthesis of multiparameter stimulation systems, evaluating the extent of their influence on the mechanisms of implementing planned tasks and the efficiency of functioning both of individual industrial elements and the system as a whole.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):162-166
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MEDICAL AND SOCIAL ASSISTANCE GIVEN TO REFUGEES BY AUTHORITIES AND SOCIETY DURING THE FIRST WORLD WAR
Kuzmin V.Y.
Abstract

Russian Government, State Duma, the public, the clergy, representatives of local government showed great concern for refugees during the First World War. Elaborated legal system concerning refugees, interaction of branches of authority, strict observation of their recommendations were of great help. The result was a considerable reduction of social tension among refugees. Problems of giving them medical help were also dealt with at congresses of Zemsky doctors (zemstvo - elective district council in Russia, 1864-1917). The experience of Russian pre-revolutionary state authorities and society is applicable to modern conditions during local and international military conflicts.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):167-173
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INSTITUTIONAL PROBLEMS OF HIGHER EDUCATIONAL MARKET FORMATION
Noskov V.A.
Abstract

The article deals with some institutional problems of higher educational market formation. Subsystems of education and market segments of higher educational service are described, comparative characteristics of different types of higher educational establishments are given.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):174-181
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METHODOLOGICAL APPROACHES TO ASSESSING COMPETITIVENESS OF AN INDUSTRIAL ENTERPRISE
Yakovlev G.I.
Abstract

Basic methodological approaches to assessing competitiveness of an industrial enterprise that takes part in foreign economic activity are considered. Analysis of the main indicators that influence the efficiency of a company's market activity is carried out, which makes it possible to assess the competitive status of the company. To be successful in the new market system based on direct competition with foreign companies home enterprises should adequately estimate their place in the system and clearly understand how well the intracompany scientific, production, technological, personnel and organizational resources conform to the current market needs and what can be done to achieve this conformity in the foreseeable future.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2003;2(1):181-185
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