SIMULATION OF AERODYNAMICS LINEHAUL TRAIN

Babenko V.A., Doctor of Physical and Mathematical Sciences, Institute of Heat and Mass Transfer Institute. AV Lykov National Academy of Sciences of Belarus, Minsk, Republic of Belarus

Baranova T.A., Institute of Heat and Mass Transfer. AV Lykov National Academy of Sciences of Belarus, Minsk, Republic of Belarus

Zhukova Ju.V., Candidate of Physical and Mathematical Sciences, Institute of Heat and Mass Transfer Institute. AV Lykov National Academy of Sciences of Belarus, Minsk, Republic of Belarus

Chornyj A.D., Candidate of Physical and Mathematical Sciences, Institute of Heat and Mass Transfer Institute. AV Lykov National Academy of Sciences of Belarus, Minsk, Republic of Belarus

Kharitonchik S.V., Ph.D., Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

The present work deals with numerical modeling of aerodynamics of a road MAZ truck with regard to the bottom relief, wheel rotation and the truck movement relative to the road. This allowed us to reveal the basic adverse zones of vortex formation. For various movements at different velocities the predicted value of the aerodynamic drag is almost constant and was equal to 0.76. This value is among the available values of the aerodynamic drag of modern foreign prototypes of road tractor-trailer truck. The results obtained can be used not only for optimization of the whole truck construction, but also for outer aerodynamic facilities and truck cab separately.

aerodynamics of a road truck, basic adverse zones of vortex formation

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EVALUATION PROCESS DYNAMIC STABILITY POWER SOURCE CABLE STEERING

Silchenko A.A., Candidate of Technical Science, Science and Innovation Development of the Council of Ministers of the Republic of Belarus, Minsk, Republic of Belarus.

Miranovich O.L., Candidate of Technical Science, Minsk Leased Enterprise of Industrial Housing, Minsk, Republic of Belarus.

Presents the results of some studies motion electrified power source for small-scale mechanization cable steering tool in the longitudinal plane, the dynamic analysis of roll-over of the unit taking into account the momentum of external forces arising in the rope. Made the simulation of the process and built according to sustainable power source for graphics, taking into account the energy and dynamic criteria’s. Work is performed within the state the integrated program of scientific research "Mechanics".

small-scale mechanization cable steering, simulation of a process, energy and dynamic criteria’s

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SIMULATION OF METAL WIRE DISRUPTION UNDER ELECTRICAL PULSE EXPLOSION

Psah'e S.G., Doctor of Physical and Mathematical Sciences, Russian Academy of Sciences, Institute of Strength Physics and Materials Science of the SB RAS, Tomsk, Russia.

Zol'nikov K.P., Doctor of Physical and Mathematical Sciences, Russian Academy of Sciences, Institute of Strength Physics and Materials Science of the SB RAS, Tomsk, Russia.

Kryzhevich D.S., Russian Academy of Sciences Institute of Strength Physics and Materials Science of the SB RAS, Tomsk, Russia.

Abdrashitov A.V., Russian Academy of Sciences Institute of Strength Physics and Materials Science of the SB RAS, Tomsk, Russia.

Research of the metal wire electrical disruption conducted. Calculations were carried out in the scope of the molecular dynamic method. Interatomic potentials were described in terms of embedded atom method. It was shown that electrical pulse dispersion process had characteristic stages, which had 3 phases. The influence of heat loading rate on dynamics of metal wire dispersion was investigated. It was revealed that heating rate increase leads to the decrease of average cluster size and increase cluster number. It was shown that the following investigation of metal wire dispersion based on molecular dynamics requires taking into account technological parameters and environmental properties.

electrical disruption, embedded atom method, metal wire dispersion, molecular dynamic method

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• Il'in A.P. Ob izbytochnoj jenergii ul'tradispersnyh poroshkov, poluchennyh metodom jelektricheskogo vzryva provolok [Regarding the excess energy of ultrafine powders prepared with the method of wire electric explosion]. Fizika i himija obrabotki materialov [Physics and chemistry of materials processing], 1994, no. 3, pp. 94-97.
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OPTION DEFINING RELATIONS SOURCEWISE-TYPE USING AN INTERNAL TIME IN THE MECHANICS OF SUPERPLASTIC MATERIALS

Vasin R.A., Doctor of Physical and Mathematical Sciences, Institute of Mechanics of Lomonosov Moscow State University, Moscow, Russia, This email address is being protected from spambots. You need JavaScript enabled to view it.

Murav'ev A.V., Candidate of Physics and Mathematics Sciences, Faculty of Mechanics and Mathematics Lomonosov Moscow State University, Moscow, Russia

Chistjakov P.V., Candidate of Physics and Mathematics Sciences, Institute of Mechanics of Lomonosov Moscow State University, Moscow, Russia

It is existed the sourcewise form of a general relation between stresses and strains in the A.A. Ilyushin theory of elastoplastic processes. A particular case of such approach is the endochronic theory of plasticity, formulated by Valanis. In this theory an "internal time"is used as a parameter for a tracking of elastoplastic process. It is offered in this paper for the description of superplastic deformation processes to use generalized internal time which is taking into account also rheonomic properties of a material. The particular forms of corresponding constitutive equations and their abilities for the description of the diagrams of superplastic deformation for alloys are discussed.

elastoplastic processes, endochronic theory of plasticity, superplastic deformation processes

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• Vakylenko A.A. Svjaz' mikro- i makrosvojstv v uprugoplasticheskih sredah [Relations between micro and macro properties of elastic-plastic media]. Itogi nauki i tehniki [The results of science and technology], VINITI, 1992, no. 22, pp. 3-54.