Известия Нац. академии наук Беларуси. Сер. физ.-техн. наук, 1998, No.2
/ Издания академии / Научные журналы
Известия Нац. академии наук Беларуси. Сер. физ.-техн. наук, 1998, No.2
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Известия Национальной академии наук Беларуси
СЕРИЯ ФИЗИКО-ТЕХНИЧЕСКИХ НАУКИздатель: Беларуская навука, Минск, Республика Беларусь |
Номер 2, 1998
СОДЕРЖАНИЕ
МАТЕРИАЛОВЕДЕНИЕ
Aslovskaja O.A., Prokopchuk N.R., Kudinova G.D., Zhizhenko G.A., Matskevich D.V.
Influence of atmospheric aging on durability of elastomeric compositions. pp. 3--7
Summary: The estimation of the rubbers longevity by the proposed express method permit one to receive the real date of the exploitative terms of the rubber products.
Dorodeiko V.G., Rubanik V.V.
Mechanical behaviour carbon steel during leave. pp. 8--11
Summary: The phase of anomalous fluctuation of velocity of creep in the quenching steel Y8A is investigated.
Khudokormov D.N., Degtyarev R.V., Zadrutskii S.P.
Clearing heat treatment of alloys of a silumin. pp. 12--14
Summary: The circuits of clearing heat treatment of an alloy Al--12%Si are offered. It is marked that optimum parameters of offered influence on metal giving stable effect on reduction of the contents of gas in having cast, are temperature of heating of an alloy 1100 °C and speed of its cooling in an interval of temperatures 1100--720 °C 80--100 C/s with the subsequent isothermal endurance during 15 min. The modifying of an alloy Sr completely removes effect of reduction of gas in having cast during thermal processing. The reception practically of modified structure in samples from a synthetic alloy Al--12%Si subjected to the offered thermal processing is marked.
НАДЕЖНОСТЬ И ДОЛГОВЕЧНОСТЬ МАШИН
Shaginyan A. S., Andrianov D. N.
On dynamic model of burst test machines with the hydraulic drive. pp. 15--21
Summary: The paper deals with dynamic analysis of modern testing machines for tensile tests. Dynamic model of testing machine, its structural scheme and mathematical model description are given in the paper. The paper can be of interest for experts in dynamics and strength of materials.
Basalaev V.N.
Adaptive process control of switching of hydromechanical transfer of the supersize automobile.pp. 22--30
Summary: The mathematical model of adaptive control by process of automative switching of frictiongear for hydromechanical transmission with help of on-board electronic computer is presented. This model can be used mainly in a heavy automobile with hydromechanical transmission. The criteria of the adaption of the control system for changing of the road conditions, mass of the automobile, conditions of the working engine and hydrotransformer, temperature of the work liquid in the control system are determined.
Berestnev Ya.O.
Obtaining of updated spectral characteristics of vibration for gears of cyclic operation.pp. 31--35
Summary: The original strategy of employment of FFT for receiving the ascertained spectral vibration characteristics of cyclic action mechanisms on the example of gear transmission is presented. Method gives the possibility to clear away the blurring of spectral lines of rotation, basic (toothed) and modulational frequencies harmonicas.
ТЕХНОЛОГИЯ МАШИНОСТРОЕНИЯ
D'yakov I.I., Belitskaya A.I., Belitskii A.V.
The theoretical fundamentals of calculating the parameters of a ridge surface of the heat exchanger and cutting tool for its obtaining. pp. 36--44
Summary: The method enables one to choose a sphere of tool's parameters and its fixing to obtain fins with optimum square and height in order to forecast heat and technical characteristics of a finned element.
Zdor G.N., Vagin V.A., Mamutov V.S., Nagovitsyn Yu.N.
The analysis of the process of drawing thin sheets under action of a preset repeated pulse loading. pp. 45--47
Summary: The consideration is made of drawing thin sheets under the action of a preset repeated pulse loading. The mathematical model is developed for calculating a process of repeated high-speed deformation of an axisymmetric envelope. The paper presents some examples of calculating blank deflection and strained state.
Dubrovskii A. A.
Study of contact interaction during hard alloy cutting of pig-iron. pp. 48--55
Summary: The presence of different types of contact interaction during titanum and tungsten hard alloy cutting tools pigirou maching similar to steel cutting type -- such as different types of built-up and interaction with existence of plastic and ductile contacts is prescribed in this paper.
Dvornik A.P.
Influence of cutting edge width of the mining cutting tool on efforts of cutting and submission of clearing combines. pp. 56--60
Summary: The results of experimental studies are discussed of cutting tool parameters effect on cutting force and feed. An original method is suggested to process experimental data which helps to estimate mathematical expectation, variation coefficient variance, function correlation and spectral density.
РАДИОЭЛЕКТРОНИКА И ПРИБОРОСТРОЕНИЕ
Alishev Ya.V., Yamaikin V.Ye., Vorob'ev V.L.
Optimization of excitation of the fibre optical communication line by a semiconducting laser lattice. pp. 61--66
Summary: The optical input surface shaping of different optical fibres and the distribution of matching films by the excitation of optical fibre line with a semiconductor laser array are designed using mathematical models and numerical methods. It is shown that using optical shaping of input surface (input lens), nonuniform matching film and optical focal length the excitatin efficiency may be sufficiently increased in comparison with a flat input.
Isakovich N.N.
Approximation of the transmission characteristics of signal tracts with zero-order sensitivity to the variation of parameters. pp. 67--73
Summary: It was determined normalizing transmission characteristics of 42 transmission signal tracts with zero-order sensitivity to the variation of parameters.
Matyuk V.F., Strelyukhin A.V.
Formation on the magnetizing solenoid end-face of pulses of magnetic field with maximum amplitude under their given specific duration and form. pp. 74--79
Summary: For design of means for nondestructive-testing the method of calculation of optimum geometric sizes of magnetizing solenoid is suggested, that provides on the end-face of solenoid of pulses of magnetic field with maximum amplitude. The method of calculation of parameters of discharge chain at given values of internal radius, duration and form of pulses is done.
ТЕХНИЧЕСКАЯ КИБЕРНЕТИКА
Kuleshov A.Ya.
Vector model normalization of arbitrary oriented and scaled object of halftone images. pp. 80--85
Summary: The vector model normalization method of arbitrary oriented and scaled objects of halftone images is proposed. This method is distinguished by introduction of homotetics coefficient, local coordinate system j01i, connected with initial point of boundary deteded, object image rotation by an angle a, multiple to 45°, in region 0 -- 315°, normalization of vector model of rotated object image, definition of corresponding orientation and normalized vector model by a minimal force moment, applied normally to the end of vector, that connects the beginning of local coordinate system with a center of gravity of object under investigation.
Polyakov A.S.
Partitioning of the programs series on parallel fragments. pp. 86--92
Summary: The task of programs partitioning on such fragments which may be performance simultaneously in different computers of distributed system are considered. The algorithm of deciding this task in respect of to programs without cycles are described.
Stepanov V.L.
Multichannel estimation for control systems adaptation in conditions of a priori uncertainty of the characteristics of source effects.pp. 93--99
Summary: The problem of control system adaptation in conditions of nondefinite characteristics of input influences on base of multichannel information treating is studied.
МЕХАНИКА
Gladyshev M.T.
Dispersive waves of hydraulic impact. pp. 100--106
Summary: The common equations of the fluid flow in damageable tubes are elaborated. At first, the linear waves, and then, ones with the low and final amplitude are analyzed.
Gorokhov V.M., Doroshkevich Ye.A., Leutin V.M.
Effect of deformation-gravimetric interaction in hard bodies during their deformation and destruction. pp. 107--113
Summary: An experimental investigation on precise measuring of metallic specimens weight subjected to forging and cutting was done. It was determined that in the course of some time after mechanical effect specimens weight was decreasing monotonously following an exponential law and approaching to some equilibrium value. An attempt was made for a theoretical justification of effect value on the base of energy conservation equation.
Bosakov S. V.
Buckling-bending flexure of the beam on elastic foundation. A plane problem.pp. 114--119
Summary: The paper presents the solution of two-dimensional problem for buckling-bending flexure of the beam on elastic foundation using Ritz's approach.
ТЕПЛОФИЗИКА, ТЕПЛОЭНЕРГЕТИКА, ТЕПЛОМАССООБМЕН
Sychevskii V.A.
Thermal-fluid and mass-transfer processes during fluid saturation and glut of a gas flow. pp. 120--124
Summary: Condensation dust- and gas-catching grounding is presented based on the process of phase transfer in liquids and the physical essence of the method is discussed. The results of full-scale tests are given which determined the efficiency of the dust- and gas-catching from smoke gases in boiler houses employing mazut and natural gas.
ЯДЕРНАЯ ЭНЕРГЕТИКА
Slizov V.P., Bryleva V.A., Grusha N.M., Vorob'eva L.B., Chistyakova T.D.
Calculational-experimental method for determination of the radionuclide composition in the radioactive fall-outs following the Chernobyl NPP accident. pp. 125--130
Summary: The method for determination of the radionuclide composition in the radioactive fall-outs following the Chernobyl NPP accident is suggested. This method is based on using the calculated radionuclide composition in the reactor core and experimental measurements. The paper presents the computer code description for the radionuclide composition calculation in the reactor core. The possibility for the calculated determination of the isotopes activities of some element in soils through the measured activity of the any one isotope is shown.
Zhmura G. M., Zhmura N. V.
Simulation of pollution of near-ground atmosphere as a result of Cs-137 deflation from the polluted territories.pp. 131--134
Summary: There are represented the results of calculations of Cs-137 annual average ground concentrations an the Belarus territory in the knots of net (50x50) km. The calculations were made on the base of a model notions about dusting area sources. The analysis of the results is shown that Cs-137 annual average ground concentrations an the Belarus territory are varied more than two orders depending on a point of calculation: from 1 mcBq/m3 to 400 mcBq/m3.
УЧЕНЫЕ БЕЛАРУСИ
Анісовіч Г.А., Танаеў В.С., Дабралюбаў А.І. і інш.
Заснавальніку Інстытута тэхнічнай кібернетыкі Г.К.Гаранскаму -- 85 год. С. 135-137
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Гайшун И.В., Анисович Г.А., Олехнович Н.М. и др.
Аркадий Дмитриевич Закревский (К 70-летию со дня рождения). С. 138--139
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Разработана и поддерживается Николаем Н. Костюковичем. Последнее обновление: 10 мая 2008 г.
Создана при участии Игнатия И. Корсака
Копирайт © 1998-2008 Национальная академии наук Беларуси
Копирайт © 1998 Издательство "Беларуская навука"
