Известия Нац. академии наук Беларуси. Сер. физ.-техн. наук, 2004, No.4
/ Издания академии / Научные журналы
Известия Нац. академии наук Беларуси. Сер. физ.-техн. наук, 2004, No.4
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Известия Национальной академии наук Беларуси
СЕРИЯ ФИЗИКО-ТЕХНИЧЕСКИХ НАУКИздатель: Беларуская навука, Минск, Республика Беларусь |
Номер 4, 2004
СОДЕРЖАНИЕ
МАТЕРИАЛОВЕДЕНИЕ
Vityas P. A., Golubtsova E. S., Gretchikhin L. I.
The formation mechanism of nanostructure ceramics based on silicon nitride. III. Experimental investigations of formation mechanism of the nanoceramics on the silicon nitride base. pp. 5--8
Summary: The investigations of density and microhardness for different samples of silicon nitride in relation to particle size of initial powders and MoSi2 content have been conducted.
It is determined the microhardness MoSi2 content relationship under 20 °C and different temperatures of thermal shock.
X-ray patterns of the pressed and sintered samples of silicon nitride ceramics were analyzed.
It is studied the change in character of X-ray patterns for silicon nitride ceramics according to MoSi2 content and thermal shock temperatures.
Zvonariov E. V., Leschok A. V., Siroeschko G. S.
On the question of friction material soldering with steel body. pp. 9--11
Summary: Special particular and universality of developed technology of friction disks production is the application the solder process instead of the galvanizing.
Tribotechnical properties of the articles producing by new technology are not worse then the properties of the same articles obtained by traditional methods (rolling, sintering under pressure).
The combining of flux tinning and "large layer" processes allows to simplify the technology of producing frictional disk. It is not necessary to use the complicated galvanizing process and expensive purify equipments, and it takes an opportunity to create new places of employment. Therefore it decreases the cost price and improves the quality of products.
Vereschyagin M. N., Shepelevich V. G., Shilko S. V., Ostrikov O. M., Tsybrankova S. N.
The annealing influence on the character of fracture at the tensile test of iron based amorphous alloys. pp. 12--14
Summary: Iron-based amorphous alloys of Fe--Ni--Co--Cr--Mo--B--Si, Fe--Cr-- Mo--Ni--C--Mg--Al and Fe--P--C--S--A--B were investigated. The bend and wire samples were stretched on the test machine COMTEN-94C.
It has been found out that amorphous alloys on iron base behave at a uniaxial tension like brittle materials while at local deformation they show plastic propeties.
МЕХАНИКА И НАДЕЖНОСТЬ МАШИН
Ibragimov V. A. †, Crernyavskaya S. V.
The influence of stress state biaxiality on fracture criterion for the solid with a crack. pp. 15--18
Summary: The solution of antiplane problem for elastic perfectly plastic body with semi-infinite crack loaded by biaxial external forces is given and the formula for effective crack length involving the force component along the crack is obtained.
Biryukov P. M.
The comparative analysis of the planetary pin and wave gears. pp. 19--21
Summary: The analysis of the wave drive and planetary drive with cycloidal gearing is presented. As a result their common features are found.
Dubrovski A. A.
On the question of plastic deformation of the cut off layer. Part 2. Cutting in the absence of the qrasp of [he contact surfaces. pp. 22--27
Summary: On the base of the analysis of theoretical statements and the experimental data the formulae of conventional shift angle and the angle of shaving texture, fully corresponding to the experiment, were obtained. At this there was ascertained that the angle of shaving texture is the angle of the real shift, determining the shift direction of shaving element without the plastic deformation inside the element during the shift.
Zhuravkov M. A., Pavlov S. V.
Modelling of macrocracks behavior in a vicinity of underground structures. Part 1. Propagation of single macrocracks. pp. 28--33
Summary: The methods of application of a linear theory of cracks for the analysis of fractures of the rock mass in vicinity of underground structures are considered.
Migoun N. P., Shnip A. I., Reut L. E.
Liquid absorption into the blind conical capillary. pp. 34--38
Summary: Differential equation describing the process of the filling of a blind conical capillary with a liquid is derived. The conclusion concerning the role of the dissolution and diffusion of a gas entrapped in defect's hollows in this process is confirmed both theoretically and experimentally.
Frantskevich V. S.
Modeling of a motion of a material particle in a ring backlash of a bowl mill. pp. 39--43
Summary: The equations of motion of a firm particle in a ring backlash of a bowl mill are analyzed. The model of motion of a particle under action of a twisted flow of gas is developed. The relations of a particle velocity and its direction from speed of gas for various angles of twist of a flow are obtained. The altitude of rise of a particle up to a contact with a wall of a mill is determ ined.
Kuzemkina G. M., Shimanovsky A. A., Zolotukhin Yu. D., Dyubin V. A.
Experimental investigations of rein-forced-concrete frame under free oscillations. pp. 44--48
Summary: The results of experimental research a three hinge reinforced-concrete frame with the lengthen columns under free oscillations are presented. Normal frequencies and decrement of free oscillations are determined on the basis of the spectrogram analysis and also with the application of developed technique approximation of experimental dependences of frame points accelerations on time. Comparison with results of computations has shown a good adequacy. The analysis of propagation of deformation waves in frame rods is executed.
Nikonchuk A. N., Basinyuk V. L., Nikonchuk I. N., Mardosevich E. I.
The correction of pulleys of herringbone toothed transmissions. pp. 49--53
Summary: The research results of deformability of herringbone toothed belts in three-dimensional statement are given. It is established that alongside with applied to straight-tooth transmissins correction of a diameter for herringbone the angular correction of an inclination of teeth of pulleys is also necessary. The technique of account of geometrical parameters of both corrections based on mechanical properties of belts materials allowing to ensure uniform distribution of transmitted loading both between separate tooth of gearing, and their contact lines is presented.
Zakharik Yu. M., Rukteshel O. S.
The foundation of dynamic system parameters of automobile machine power unit related to the research of clutch control modes. pp. 54--56
Summary: The requirements to automobile machine power unit dynamic system were founded.
Kusyak V. A.
On the influence of initial search step value on the results of the algorithm synthesis of gear shift. pp. 57--59
Summary: The article deals with the matters of searching of working step influence on the output characteristics of the optimization process. Rationalization of adoption initial step is proved, surface of integral kriteria efficience in the extremum area is investigated. Recommendations for the choice of optimal search step at multicriteria task solution of gearshift algorithm synthesis are given in activity.
МАШИНОСТРОЕНИЕ
Yascheritsyn P. I., Rakomsin A. P., Sergeev L. E., Sidorenko M. I.
The magneto-abrasive treatment with labricating and cooling technological mixture based on ampicole. pp. 60--62
Summary: The new type of lubricating and cooling technological mixture (LCTM) for magneto-abrasive treatment (MAT) was elaborated and created on the bases of local raw materials. This type includes the mixture of anionactive surface -- active substances (SAS) and allows to expand the range of using for MAT LCTM and to reach the necessary productivity and quality of treatment process.
Zaitsev V. A., Kuzey A. M., Martsinkevich E. A.
The mechanism of diamond fracture at polishing. pp. 63--66
Summary: The use of diamond-abrasive composite materials with inorganic fillers is shown to allow stabilization of a diamond polishing process. The grain size decrease of Ni-diamond composite material increases the coating diamond microscopic powder content as well as the polishing productivity.
Kiselyov M. G., Drozdov A. V.
The particularities of a formation of a treaten surface finish at vibration-impact cutting of brittle materials. pp. 67--70
Summary: The questions of the mechanism of the shaping to asperity processed surfaces under cutting frail material is considered. The scheme of the modernized installation realizing vibroimpulsive mode of the processing is presented. The values of the parameter Ra and photographers of surfaces sawn up both in usual and in vibroimpulsive mode are given.
РАДИОЭЛЕКТРОНИКА И ПРИБОРОСТРОЕНИЕ
Kurayev A. A.
The particularities of EHF electromagnetic waves propagation in alive biological objects. pp. 71--74
Summary: The new sight at the mechanism of distant propagation of EMF-waves in alive biological objects has been developed. This mechanism is determined by arising of dynamic negative conduction of membrane of cell in the presence of
transportation through its positive and negative ions K+, Na+, Cl-, NO-3 , and brighten up of membrane at high frequency, and re-radiation the waves by the acoustic-electrical oscillations of membrane.
Chernyshev A. V.
The formation of asymmetric minor hysteresis loops at magnetic reversal of steel samples. pp. 75--80
Summary: The problem of nonlinear dependence of reversible magnetization component Mrev from strength H of magnetic field is discussed. It is shown, that at weak ac magnetic field with presence of bias magnetic field asymmetry of obtained minor hysteresis loop can be caused mainly by nonlinear dependence of Mrev on H.
ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ И СИСТЕМЫ
Khatsirevich V. G., Yarmosh N. A. †, Kuleshov A. Ya.
The design principle of the string-less electronic class board, one realizes the modulation principle of amplitude of current. pp. 81--87
Summary: We propose a principle of constructing stringless electronic class board on a base of the method of amplitude-impulse modulation over the current of coordinate tire on positionscanning system, one implements coding of graphic information in the process of its writing. The principle is based on applying multilayer construction of class board, containing three layers protecting, coordinate tires and receiver contours. Two upper layers are easily deformed under pressure of chalk piece as writing instrument.
Sadykhov R. Kh., Otvagin A. V.
The optimization of the control algorithms in the real-time control computing system based on the virtual network model. pp. 88--94
Summary: The algorithm of assignment of elementary operations set for parallel program by the real time multiprocessor system on processors, included in architecture of the system is considered. The brief review of existing technologies of the similar task decision is given, the choice of a method of the decision is proved, the conceptual model description for a virtual network used by optimization is made and the results of experiments are analysed.
Rylov A. S.
The theoretical foundation to form compact feature spaces for solving of automatic pattern speech recognition. pp. 95--105
Summary: The uniform theoretical foundation to form compact feature spaces for classification, identifikation and diagnostic tasks of speech pattern recognition is developed. It is a result of analysis a contemporary knowledges about of physiological, psychoacoustical and information aspects of speech production, speech perception and pattern recognition.
ЭНЕРГЕТИКА, ТЕПЛО- И МАССООБМЕН
Bairashevsky B. A.
The estimation of heat losses and effectiveness of the heat networks. pp. 106--110
Summary: The concepts of the virtual sizes of a heat network are introduced: lengths, diameters and cross-sections for a flow of a heat carrier as the functions of general surfaces and volumes of tubes as unified criterion. It allows to reveal the series of self-similar parameters of the heat network, bound with the activity modes. In particular, it is shown, that the value of the related losses of a heat, expressed in percentage to heat flow, is not suitable as the comparative parameter for heat networks of miscellaneous sizes. By way of alternative the heat transfer coefficient or its inverse value -- factor of thermal insulation heat resistance, averaged on the virtual sizes of the heat network, is offered.
Lebedev V. Ya., Golub V. M.
The temperature field of a rotary cutting tool considering locality of thermal effect in a the cutting zone and heat interchange with environment. pp. 111--117
Summary: The calculation of the temperature field of a rotary cutting tool has been made considering the locality of thermal effect in a cutting zone as well as heat interchange with environment. The relationships of temperature distribution in the body of a rotary cutting tool have been obtained.
ДИАГНОСТИКА И БЕЗОПАСНОСТЬ ТЕХНИЧЕСКИХ СИСТЕМ
Grebenkov A. J., Kopets Z. V., Rytvinskaya E. V., Vetcher V. A.
Development of immobilizing matrix for radioactive hearth ash of low activity level. pp. 118--121
Summary: The incorporation of a certain quantity of the sorbing admixtures, i.e. the clay containing about 80 mas.% of mont-morillonite, natural molding flask, into an ash-cement matrix allowed obtaining the hardened compounds with radioactive ash mass fraction of 40--60 mas.%, which physicochemical characteristics are significantly better that those required by regulations. This will facilitate the development of effective low active hearth ash utilization technologies.
АННОТАЦИИ ДЕПОНИРОВАННЫХ СТАТЕЙ
Frolov Yu. V.
The general structure of the algorithm support of the subsystem of data distributed processing in automated control system. p. 122
Frolov Yu. V.
The design and basing of structural organization principles of the subsystem of data distributed processing in automated control system. p. 122
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Разработана и поддерживается Николаем Н. Костюковичем. Последнее обновление: 2 декабря 2006 г.
Создана при участии Игнатия И. Корсака
Копирайт © 2005-2006 Национальная академии наук Беларуси
Копирайт © 2004 Издательство "Беларуская навука"
