Известия Академии наук Беларуси. Сер. физ.-техн. наук, 1997, No.2

Известия Академии наук Беларуси. Сер. физ.-техн. наук, 1997, No.2

Известия Академии наук Беларуси
СЕРИЯ ФИЗИКО-ТЕХНИЧЕСКИХ НАУК
Издатель: Беларуская навука, Минск, Республика Беларусь

Номер 2, 1997

СОДЕРЖАНИЕ

МАТЕРИАЛОВЕДЕНИЕ

Gapanovich L. I.
On a nature of forces managing the formation of monomeric and polymeric organic unions (by way of discussion of reactions of "ion type"). pp. 3--20

Summary: Discovery the appearance change property mono- and polymer organic unions in crusher through complex combination.

Orlov Yu. G., Dudetskaya L. R., Sergeev L. E.
Magnetic abrasive materials: principles of creation and technological processes of manufacturing. pp. 21--26

Summary: The paper is devoted to generalization and systematization of the information about the magnetic abrasive materials (MAM). The notion of the principal physico-mechanical properties MAM and their manufacturing technology have been presented. The new method of the preparation casting MAM have been suggested and developed.

Rafeenko E. D., Chigarev A. V.
Designing and synthesis of composite layers with the specified properties. pp. 27--31

Summary: A technique for designing the composite layered medium with the specified noisevibroinsulating properties is considered. In single-scattering approximation the functional describing the coefficient of reflection of a wave from heterogeneous layer was built up. The distribution of velocity of a wave and the elastic modulus over the layer was found in analytical form. The algorithm of realization of found dependence has been developed.

Pyatov V. V., Kovchur A. S., Vasilyev I. D.
Improvement of technological properties of powder materials received from wastes of electrochemical production. pp. 32--38

Summary: The way of improvement of technological properties of metal powders from wastes of electrochemical production by plasticization of paraffin is developed. The optimum parameters of plasticization was determined. The opportunity of practical use of results of researches in nonconsumable electrodes production for dot contact welding is shown.

НАДЕЖНОСТЬ И ДОЛГОВЕЧНОСТЬ МАШИН

Prushak V. Ya., Zyuz'kov A. D., Bogdanovich P. N., Shcherba V. Ya., Zayats I. M.
Influence of frictional heating on wear process for a composite material with dispersive contact layer. pp. 39--42

Summary: Wear regularities of antifrictional material which contact layer is a spherical particle backfill are considered under varying particle size and contact loading.

Prushak V. Ya., Shcherba V. Ya., Zayats I. M.
Regularities of conveyer belt wear. pp. 43--46

Summary: Regularities have been investigated of conveyer belt wear and the efficiency of increasing the belt length. A method has been elaborated to calculate the resource of the upper belt cover and the belt life in conditions of dressing plants of potassium industry.

ТЕХНОЛОГИЯ МАШИНОСТРОЕНИЯ

Kundas S.P.
The concept of integrated simulation modeling the process of plasma spraying of coatings. pp. 47--55

Summary: A conception of integrated simulation of coatings plasma spraying is proposed. It is based on the creation of integrated software-complex with mathematical models of all plasma spraying stages, data base of coating, plasma-gas, substrate properties, their temperature dependencies, organisation of through data transmission and imitation of particles input in plasma jet with generator of random numbers.

Yashcheritsyn P.I., Zabavskii M.T., Kozhuro L.M., Kheifets M.L.
Increase of efficiency of processing the wear-resistive coverings by rational orientation diamond and abrasive grains of tools. II. Magnetic-abrasive treatment. pp. 56--59

Summary: Parameters of strained condition, quality of surface layer and efficiency of magnetic-abrasive treatment of parts with wear resistance facing have been examined.

Berestov E.I.
Soil passive pressure on the edge of a broken breast wall. pp. 60--71

Summary: On the basis of Utmost Balance of Friable Soil Theory there obtained conclusions which permit to determine soil passive pressure on the edge of a broken breast wall. There considered the variants of the lower edge loading if there is the line of a gap, which divides destruction zones, adjoining the filling and the upper edge of the breast wall so, while uninterrupted voltage distribution as with active so with passive zones between the upper edge of the breast wall and the filling.

РАДИОЭЛЕКТРОНИКА И ПРИБОРОСТРОЕНИЕ

Korshunov F.P., Vorobei R.I., Kozello R.T., Korztenevckii A.G., Yarzhembitskii V.B.
The reflection focusing sensor on the basis of the metal -- semiconductor -- metal structures. pp. 72--77

Summary: This paper presents results of the parameter optimization reflection focusing sensors, which is based on metal-semiconductor-metal structures. Besides at the parameter optimization it has been taken into consideration the design peculiarity these sensors. This paper shows basic elements of sensors physics model. For sensors function efficiency value it uses the output characteristic steep factor. It investigates influence of photosensors bias on focusing curves, offers the photosensor design with optimal parameters relatively the output characteristic steep factor. These photosensors permit to simplify autofocusing systems due signal inside machining.

Shushkevich G.Ch.
Electrostatic problem for thin open-ended ellipsoidal shell located inside sphere. pp. 78--83

Summary: The boundary-value problem for the Laplace equation is reduced to a inhomogeneous Fredholm integral equation of the second kind by using the addition theorems and theory of dual series equations. The numerical calculations have been performed.

Silkov D.N., Bayev A.R.
Influence of curvature of steel products on the equilibrum forms magnet fluid ultrasonic transducer. pp. 84--88

Summary: This article deals with questions of parameter changing for magnet fluid ultrasonic transducer during controlling of units that have surface flexed. Basing on magnetostatic equation in Bernoulli approximation gradient it is analyzed the changing of magnetic field because of contact surface flexion. Theoretical analysis of magnet field distribution is made for two dimensional model of magnet field source and endless cylinder object. Magnetic field is created by endless bar magnet, magnet is homogeneously magnetized. Method of electromagnet images is used. In this paper the main magnetic system requirements is defined for positive and negative flexion.

ТЕХНИЧЕСКАЯ КИБЕРНЕТИКА

Yarmosh N.A., Khatsirevich V.G., Kuleshov A.Ya.
Decoding and selective input in computer of half-ton image on the basis of colour TV system. pp. 89--97

Summary: A method of automated selective enter into computer of half-ton colour image elements wich optimal value of optical density and colour sign is proposed. This method is based on two-beams photomeasuring scheme, colour TV system, colour decoding with using quantitative ratio of main colours: red, green, blue.

Zhjoma T.G., Yarmosh N.A.
Method of the automated conceptual analysis of text. pp. 98--109

Summary: Method of conceptual modeling and automatic analysis of text, based on formalized representation of semantic structure of text by means of formal grammatics and recursive ruleoriented models, is offered. The method permits automatically to form the knowledgebase of objects and situations for text processing.

Kartsev V.T.
Elimination of the picture distortions caused by transition to its description as set of the standard primitives. pp. 110--114

Summary: Decomposion of the picture into the set of the standard primitives is executed in the time of rasterization. This conversion is the cause of distortions of the picture. In the paper the classification and the methods of elimination of distortions are suggested.

МЕХАНИКА

Sklyar O.N.
On one system of the equations of the mathematical theory of elasticity. pp. 115--116

Summary: It is proved that the base system of elasticity stress problem can not be consisted of three equilibrium equationsand three Beltrami -- Michell equations with respect to normal components of stress tensor.

Botogova M.G., Mikhasev G.I.
Free low-frequency vibrations of viscoelastic cylindrical shell in view of influence of a temperature field influence. pp. 117--123

Summary: The lowest spectrum of free vibrations of an evenly heated noncircular cylindrical shell is investigated. The vibration is supposed to be localized near the certain generatrix, called the weakest. The frequencies and mode shapes for vibrations have been found by using the asymptotic expansions.

Sklyar O.N.
Plane stress problem of the elasticity theory in pressures and its singular solutions. pp. 124--126

Summary: The plane stress problem of linear elasticity is investigated, the base system of resolving equations is indicated, its hypoellipticity is proved, fundamental matrix is constructed.

ТЕПЛОФИЗИКА, ТЕПЛОЭНЕРГЕТИКА, ТЕПЛОМАССООБМЕН

Kapustina I.B.
Features of radiative-chemical polymerization of a polyester lacquer ПЭ-265 on heat-insulating substrates. pp. 127--130

Summary: The peculiarities of radiation polymerization of polyester lacquer on heat-insulating substrates have been investigated. It is shown, that radiation-chemical modification of the surface layer of perlit substrates made it possible to improve essentially the properties of heat-insulating materials.

Bogdanov A.P., Zhmura G.M.
Modeling of air carry of Cs-137 under taking into account the dust-making distinction on arable and long-fallow lands. pp. 131--134

Summary: The mathematical model for air transfer of Cs-137 out from the contaminated regions, which takes into account of dust-making distinction on arable and long-fallow lands, is suggested. The calculation results of near-ground concentrations of Cs-137 for several towns of Belarus are presented. The sources of the contamination of the atmosphere in every calculated point have been analysed.

ЯДЕРНАЯ ЭНЕРГЕТИКА

Savushkin I.A., Naumov A.V., Ravkova E.I., Gurko O.B., Komarovskaya L.V.
Influence of entrance parameters peculiarities on results of calculation of melting of the active zone for NPP with VVER-440. pp. 135--138

Summary: The calculation investigations of major accident development of NPP with VVER-440 depending on the choice of peculiarities of core melting models and construction elements in reactor vessel with the help of the mathematical program MARCH were conducted. The calculations were conducted for the accident with large loca in the primary circuit.

АННОТАЦИИ ДЕПОНИРОВАННЫХ СТАТЕЙ

Silkov D.N., Baev A.R.
Application of effects of deformation of equilibrum border of magnetising and unmagnetic liquids for focusing of ultrasound. pp. 139--139

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Designed and maintained by Dr. Nikolai N. Kostyukovich. Last updated: January 31, 1998
Created with assistance of Dr. Ignatii I. Korsak
Copyright © 1997, 1998 The National Academy of Sciences of Belarus
Copyright © 1997 The Belaruskaya Navuka Publishing House