Известия Академии наук Беларуси. Сер. физ.-техн. наук, 1996, No.2

Известия Академии наук Беларуси. Сер. физ.-техн. наук, 1996, No.2

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

Номер 2, 1996

СОДЕРЖАНИЕ

МАТЕРИАЛОВЕДЕНИЕ

Dudetskaya L.R., Pokrovsky A.I.
Investigation of a role of the structural factors in iron hardening during a hot extrusion. pp. 3--8

Summary: The ion hardening has been investigated during a hot extrusion. With increasing the degree of strain the strength and plasticity of longitudinal specimens are increased twice and those of transverse specimens remain actually unchanged. Any deflection of a graphite shape from a sphere has a negative effect on a strength. The strength is increased by enhancing the amount of perlite, decreasing an austenite grain size and perlite fineness.

Mаtveiko N.P., Zharsky I.M., Poplavsky V.V.
Электрохимические свойства поверхностных слоев, сформированных на никеле при науглероживании и силицировании. pp. 9--11

Summary: Effect of the surface thermodiffusion treatment with the graphite and silicon on the anode behavior of nickel in water solutions has been investigated.

Rudnitsky V.A., Dyakovich V.V.
About the influence of average speed of plastic deformation on results of measurement of dynamic hardness. pp. 12--16

Summary: The effect of strain rate on the results of the testing of metall under dynamic loading is considered. The theoretical and experimental investigations showed that the most accurate characteristic of the dynamic indentation is the velocity of plastic deformation of tested material at the impact.

НАДЕЖНОСТЬ И ДОЛГОВЕЧНОСТЬ МАШИН

Biryukov P.M.
Dynamic study of planetary-cogged reducer with the help gain-frequency characteristic of a system. pp. 17--21

Summary: The paper deals with the method for evaluation of the planetary-cogged reduction gear box dynamic properties. Analytical expressions for engineering calculation of gain-frequency characteristic of the dynamic systems are obtained.

Stepanov V.L.
Оптимальное обнаружение скачкообразных изменений свойств случайных процессов в задачах текущего мониторинга и диагностики технологического оборудования. I. pp. 22--26

Summary: The problem of change detection in discrete-time dynamic systems characteristics on the basis of theory of dynamic systems with random structure and optimal statistical decision theory is solved in this paper. Part I is devoted to sufficient statistics for synthesis of optimal decision rule when measurement noise is absent.

Summary: The problem of change detection in discrete-time dynamic systems characteristics on the basis of theory of dynamic systems with random structure and optimal statistical decision theory is solved in this paper. Part II is devoted to sufficient statistics for synthesis of optimal decision rule when measurement noise is present.

Shestakov V.М., Revyako М.М., Ryabinin V.А., Poluyanovich V.Ya.
Энергетика фрикционных металло-полимерных пар трения. pp. 30--34

Summary: The problems of friction and heat transfer in the brakearrangements are discussed.

ТЕХНОЛОГИЯ МАШИНОСТРОЕНИЯ

Yashcheritsyn P.I., Sergeev L.Е., Kаlina V.N.
Зависимость эффективности магнитно-абразивной обработки отверстий от оптимальности магнитных систем. pp. 35--38

Summary: The paper describes the investigation of the efficiency for magneticabrasive treatment of holes using the variation of the significant factors. The comparative appraisal of the different types of the electromagnetic systems has been determined. The criterious of the increase productivity of the method are given. The accumulative experience in the field of a magneticabrasive treatment of holes for the industrial application has been generalized.

Bosakov S.V.
On stability of the compressed circular plate on the elastic half space. pp. 39--41

Summary: Using energy method S.P.Timoshenko in paper presents solution for critical forces in circular plates on the elastic half space.

Sysoev P.V., Starikov S.V., Prushak V.Ya., Kukhorev P.L., Zyuzkov А.D., Derba V.Ya.
Анализ структурных факторов долговечности опорных дисков, изготовленных из стали Х12М. pp. 42--46

Summary: The studing results are reported of microcrystalline structures of a stainless steel base disk used in axial - piston pumps. An optimal tempering regime is proposed for reducing of internal tensions.

Starikov S.V.
О возможности фазового превращения на границах зерен в сверхпластичных эвтектиках. pp. 47--49

Summary: Temperature dependences of maximal elongation, internal friction value, Young's modulus and heat capacity for Pb - Sn, Cd - Sn, Bi - Sn and Bi - Pb - Sn eutectic alloys are reported.

Vereshchagin М.N., Chernichenko Yu.D.
Теоретическое исследование динамической устойчивости цилиндрических тонкостенных оболочек в процессе их вращения при наличии сжимающей нагрузки (линейное приближение). pp. 50--55

Summary: It is shown that the stability of process two-cylindrical of the hardening melt on elastic barrels and the quality of getting ribbons depends on the dynamic stability of circular cylindrical thinness casings. The linear problem of dynamic stability thinness casing in the process Its rotation and the availability of compressible loading is solved. The analytical expression for the calculation of hollow casing is obtained. The analysis of process oscilation revolving thinness casing Is performed. It is determined that the phenomenon of resonance disappears when the coefficient damping #&100 #&179 #&119₀/#&2142, but the unlinearance of process introduces essential changes in the character oscillations.

Vereshchagin М.N., Chernichenko Yu.D.
Теоретическое исследование динамической устойчивости цилиндрических тонкостенных оболочек в процессе их вращения при наличии сжимающей нагрузки (нелинейное приближение). pp. 56--60

Summary: It is shown that the unlinearance exerts essential influence on the character oscillations of cylindrical casings in the process their rotation and the availability of compressible loading. The dependences between the amplitude and phase static oscillations of casing from the frequency of external force were found by means of solution Duffinge's equations for the forced oscillations calculating the additional dicrease of oscillations on account of damping. The analysis of amplitude-frequency characteristics of process oscillation revolving casing is performed. The conditions stability static regimes of casing in the process its rotation under the availability of compressible loading and the damping are determined.

ТЕХНИЧЕСКАЯ КИБЕРНЕТИКА

Rimsky G.V., Маzurenko Ye.G.
A root-locus method of investigation of conditional stability of linear interval dynamic systems. pp. 61--63

Summary: Root-locus method of robust stability investigation for multidimensional control systems is considered. It is proved theorems about robust stability by using system of root equations with edge coefficients and Kharitonov's test.

Polyakov А.S.
Модель последовательной программы и ее распределенной реализации. pp. 64--71

Summary: The data-and-control links graph (DCLG) whose vertices correspond to program operations, and arcs to control and/or data links between operations has been proposed as a mathematical model for the sequential program amenable to distributed processing of the program. The DCLG vertices and arcs have weighs assigned to them. The DCLG analysis allows for identifying the graph fragments that can be handled simultaneously on various processors. It is seen therefore that specific features of the problems to be handled by the program are taken into account in the model which allows us to develop a variety of versions for the distributed processing of a particular program.

Kartsev V.T.
Круговая интерполяция при реализации нового подхода к осуществлению векторно-растрового преобразования. pp. 72--73

Summary: For the new vector-to-raster conversion approach the algorithm of circular interpolation is suggested in the paper.

Yarmosh N.А., Khаtsirevich V.G., Кuleshov А.Ya.
Автоматизация избирательного ввода элементов полутонового изображения и их обработка в высокопроизводительных системах. pp. 74--80

Summary: The problems of a selective input into computer the image elements with automated task of a threshold value of brightness and usage of a method of angular planes, technology o( processing and identifying the objects to their contour representation are considered.

Novikov S.A.
Исследование влияния характера перемагничивания и параметров покрытий при акустико-эмиссионном контроле отслоений. pp. 81--86

Summary: The acoustic emission of galvanic nickel platings on the non-magnetic base was investigated under the impact of the alternating magnetic field its frequency varying from 20 to 200 Hz. The influence of the alternating magnetisation field, diameter of the swelling, thickness of the plating and heat treatment on the acoustic emission was analysed.

РАДИОЭЛЕКТРОНИКА И ПРИБОРОСТРОЕНИЕ

Trusov N.K.
The proximate method for definition of initial magnetic permeability ferromagnetic materials. pp. 87--89

Summary: The proximate method of static initial magnetic permeability determination of ferromagnetic materials on the test pieces in form of hollow round cylinder by ifs magnetization with crossed electromagnetic field in broken magnetic circuit are suggested and theoreticaly substantiated.

Plyugachev К.V.
Modeling the reconfiguration of manipulators. pp. 90--95

Summary: Analyses of kinematics and dynamics of the process of reconfiguration is presented. The formulaes for calculation of contact forces and for description of manipulator's movement are obtained.

ТЕПЛОФИЗИКА, ТЕПЛОЭНЕРГЕТИКА, ТЕПЛОМАССООБМЕН

Rubin I.Ye., Dneprovskaya N.М., Litvinenko B.А., Tetereva N.А.
Модификация программы КРАТЕР для расчета реакторов с уран-гадолиниевым топливом. pp. 96--100

Summary: The KPATEP program modification developed in the IPE, Belarus Acad. Sci., for three-dimensional diffusive calculation of uranium-gadolinium -fueled reactors has been represented. It has been demonstrated that the program is efficient for calculations of light-water reactors containing uranium-gadolinium elements in the fuel assembly.

Migun N.P.
Double-sided filling of larger sizes conical capillaries with liquids. pp. 101--103

Summary: It has been found that the phenomenon of double-sided filling of closed conical capillaries with liquids takes place at considerably larger sizes than those considered earlier.

Rakhno I.L., Lantsov I.Ye., Коrneev S.V., Ulanovsky А.V.
Modeling of gamma-spectrometers. pp. 104--108

Summary: The method for calculation of deposited energy spectrum and response functions for three-dimensional gamma-spectrometers is developed. Good description of experimental data for scintillation NaI detector has been achieved. The software developed can be used instead of carrying out numerous expensive experiments or when optimizing design of new b- or g-detectors, as well as for simulation of radiation induced faults of microelectronic devices.

Litvinenko B.А., Rubin I.Ye.
Количество делений тяжелых нуклидов в топливосодержащих массах разрушенного реактора ЧАЭС. pp. 109--111

Summary: The calculation data on the quantity of spontaneous fissions and those induced by neutrons of heavy nuclides in the fuel of the destroyed Chernobyl Nuclear Power Station reactor have been presented.

Novik G.М., Pоbitko А.I., Sаlnikov L.I.
To determination of thermodynamic and hydrodynamical parameters of metal targets after influence on them of electronic beams. pp. 112--114

Summary: The calculation of the thermodynamic and hydrodynamic parameters of target is the first stage of estimation of combined influence of thermal tensions and stress waves in the process of cold destruction of metals with relativistic beams of charged particles. Region of arising of stress waves as well as their spreading through the target can be determined from the known thermodynamic parameters.

Byl G.N., Кrylovich V.I.
A remote method for definition of acoustic resistance of a transitive layer. pp. 115--119

Summary: It is shown how with the help of the sonding acoustic impulse of special form may be determined the acoustic impedance of the transitional layer when the acoustic impedances of the passing and reflecting media are known.

АННОТАЦИИ ДЕПОНИРОВАННЫХ СТАТЕЙ

Кirilenko А.T.
Влияние вязкоупругого опирания на колебания перекрытия зданий при возбуждении основания. p. 120

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Designed and maintained by Dr. Nikolai N. Kostyukovich. Last updated: February 7, 1999
Created with assistance of Dr. Ignatii I. Korsak
Copyright © 1997-1999 The National Academy of Sciences of Belarus
Copyright © 1996 The Belaruskaya Navuka Publishing House