Autor: Shekhovtsov, V. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of the drive constructions of extra-low pressure rubber-tired propellers of the vehicles for carrying goods
Autorzy:: Liashenko, M. V.
Chebanenko, A. P.
Shekhovtsov, V. V.
Powiązania:: https://bibliotekanauki.pl/articles/241663.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: cross-country vehicles
extra-low pressure tires
vehicle passability
transmission of power
transmission
Opis:: Overcoming of road impassibility, increase of vehicle passability are the issues that are always actual for the areas with insufficiently developed road network in remote regions of the North, the Far East, Siberia, and also the lack of roads in oil and gas production places and their transportation to gathering stations. This issue is also actual during rescue missions after natural disasters, emergency situations and technogeneous disasters. To solve this important issue domestic and foreign industries produced and produce different kinds of off-road vehicles and snow and swamp-going vehicles: caterpillar, ski-caterpillar, on low-pressure tires. The advantage of the latter is the discovery of new opportunities in transportation, ecological compatibility, improved productivity and passableness. It is important to mention that almost all vehicles on extra-low pressure tires can swim. The fact that they all possess hermetic frame contributes to it, what is more, this usage of extra-low pressure tires provides this opportunity. This opportunity to deliver goods by the vehicles with extra-low pressure tires (VELPT), having no restriction in exploitation in summer and winter in the conditions of Arctic weak tundra, increases the competitive power of these vehicles compared to caterpillar off-road vehicles. Moreover, their usage is much cheaper than delivery by helicopter. All these lead to the popularity of VELPT, the growth of the number of their types for various purposes and appearance of new producers of this type of off-road vehicles.
Źródło:: Journal of KONES; 2015, 22, 1; 181-184
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The choice of motor : transmission installation for the pipe layer
Autorzy:: Shevchyuk, V. P.
Shekhovtsov, V. V.
Krivosheev, N. V.
Powiązania:: https://bibliotekanauki.pl/articles/241544.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: motor – transmission installation
pipe layer
Opis:: The results of research, which applied character, for an industrial complex, will allow resolving topical and important issues of increase of efficiency of operation of park of special equipment in the course of a production activity, at stages of a project and preparatory work are given in article. In previous articles [1, 2, 3, 4, 5] proposed mathematical model of determination of productivity of the machine -tractor unit (MTU) with industrial function is presented in article during the pipelaying works. The mathematical model coordinates all key technical parameters of the pipelayer and the parameters defining service conditions in uniform dependence. The method of "minimization of duration of a running cycle of the machine" is put in mathematical model, as duration of a running cycle is one of generalizing indicators of technical and operational efficiency of MTU. In other words, productivity of the pipelayer is in inverse relationship with a duration of a running cycle, the less time is spent for pipeline laying, the productivity and efficiency of construction is higher. Various ways of laying of the pipeline define boundary conditions, which form some private models.
Źródło:: Journal of KONES; 2015, 22, 1; 285-288
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Investigation of thermal intensity of hydropneumatic spring of vehicle
Autorzy:: Cherkashina, E.
Liashenko, E.
Shekhovtsov, V.
Valentsev, M.
Powiązania:: https://bibliotekanauki.pl/articles/244660.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vehicle
hydropneumatic spring
average capacity
temperature
thermal intensity
external surface area
Opis:: During the moving of vehicle is a change in temperature mode, which arises due to fluid friction in the dissipative element (throttle bores) hydropneumatic spring. In this case, hydropneumatic spring can be warm to significant temperatures. Due to lower viscosity of the fluid below the warning level, the increased heat causes a sharp increase in various types of leakage, increased friction parts, and as a consequence, the intensive wear and seizure of the surfaces. This leads to partial or complete loss of efficiency hydropneumatic springs. To changes in temperature mode in the hydropneumatic spring is influenced not only the external surface of the hydropneumatic spring, temperature and speed of blowing air flow, but also the conditions and the duration of the moving of vehicle. In this paper we investigate the heat intensity of the hydropneumatic springs of vehicle in weight 5.5 tons during the moving at different speeds for different types of roads. Investigations were carried out on the basis of mathematical models realized in a package of Matlab Simulink. In this case, was fixed the time average power released in the hydropneumatic spring in the form of heat. According to the research conclusions were drawn about the most heavy-duty vehicle and the amount of heat generated by the length of relative motion in this mode. To prevent overheating, an algorithm diagnosis of the condition and management of heat intensity of the hydropneumatic springs Also made recommendations to reduce the heat intensity hydropneumatic springs.
Źródło:: Journal of KONES; 2011, 18, 1; 99-102
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Decreasing of vibration load level on tractor operator’s working place by means of using of vibrations dynamic dumpers in cabin suspension
Autorzy:: Shekhovtsov, K. V.
Sokolov-Dobrev, N. S.
Pobedin, A. V.
Liashenko, M. V.
Shekhovtsov, V. V.
Potapov, P. V.
Powiązania:: https://bibliotekanauki.pl/articles/243907.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: tractor cabin
suspension
standard vibroisolator
dynamic vibration damper
Opis:: This paper is devoted to describing of method of decreasing of vibration load level on tractor operator’s working place by means of using of vibrations dynamic dampers in cabin suspension (on other words – dynamic absorbers of dynamic vibroisolators). Standard cabin vibroisolators of tractors DT and VT series include monolith rubber block and have limited capabilities to change its elastic parameters adaptively during impact of vertical and lateral vibration loads with various frequencies. Elastic-damping properties of these vibroisolators does not allow to provide comfortable conditions for operator work because their abilities of vibration damping are not enough especially at low-frequency vibrations. Dynamic vibration dampers installed in cabin suspension were proposed by authors for decreasing of vibration load level on operator workplace. These dampers include additional masses connected to main mass due to elastic-damping elements. Several variants of dynamic vibroisolators schemes were proposed by authors. These schemes differ in quantity of additional masses (one, two or three) and type of connection between additional masses and main mass due elastic-damping elements (parallel or in series). Three-dimensional model of caterpillar chassis, suspension, engine, cabin and operator’s seat of tractor was created in software “Universal mechanism” for performing of computational research. On this model, researches of vibration of sprung mass were made for tractor motion with and without hook load at 3rd and 7th gears on smooth surface and on testing areas with single, periodic and random bumps. Research results indicate undoubtedly best vibroprotective properties of cabin’s suspensions with dynamic vibroisolators.
Źródło:: Journal of KONES; 2015, 22, 1; 276-284
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The research of the dynamic load of the power train of the caterpillar tractor Chetra 6C-315
Autorzy:: Shekhovtsov, V.
Sokolov-Dobrev, N.
Shevtchuk, V.
Liashenko, E.
Powiązania:: https://bibliotekanauki.pl/articles/244457.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: dynamic load
power train
dynamic model
torsional vibration
caterpillar tractor
Opis:: The paper describes the developed dynamic model of the caterpiller's power transmission. Its advantage is the integrated dimensional model of caterpillar propeller. Animated motion modelling provides the formation and transfer of kinematic and dynamic disturbances from caterpillar chassis, causing the greatest loadings of the power circuit sections. The principle of power transmission mathematical model’s differential equations forming is described. Result of the model's computational research is a set of oscillograms of the drive wheel’s torque changing for different operating modes. The values of power transmission masses' natural frequencies are obtained. The research of the nature of transmission sections' dynamic loading by torsional vibrations, that arise and spread on the shafting, when the linked track rewinds, is carried out. The diagrams show that local maximums of dynamic coefficients characterize the regimes with high hook load. The increase of torques for these sections happens because of approximation of the peculiar frequency of the system and the frequency of one of the harmonic components of stimulating actions. At this peak, value of the oscillation belongs to the masses, the partial frequencies of which are closest to the frequencies to the stimulation actions. Dynamic load of such sections is quite high. The material of these sections often gets fatigue damage, which can lead to breakdown. The analysis of the diagrams, made for basic operation speeds between 1,0 – 5,5 m/sec showed, that maximal peak values of dynamic coefficients appear on sections between 10 and 59 masses in the transmission. Maximal dynamic load of these sections appear at hook load from 0 to 40 kN.
Źródło:: Journal of KONES; 2011, 18, 1; 535-546
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The optimization of the design strength characteristics of the frame of the tractor
Autorzy:: Babushkin, A. E.
Kosov, O.
Shekhovtsov, V.
Lyashenko, M.
Powiązania:: https://bibliotekanauki.pl/articles/243719.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: tractor
carrier system
strength characteristics
Opis:: At present there are a many constructions of the carrier systems of motor transport means, bodies with the systems of communications in the form of rigid triangles executed in the form. This makes it possible to assume that the technical solution has high efficiency and correctly it can be examined in application to the tractors. An increase in the hardness, strength and longevity of frame due to an increase in the dimensions of the profile used or improvement of technology and design of the welded connections, which decrease the stress concentration in the region of the welds, can prove to be not the most rational solution from the point of view of labor expense and material consumption. More preferable in this respect the frame, made in the form of three-dimensional truss in lower part of which is fastened running apparatus, and inside are located engine, transmission, panels of skin of cowling and cab, control station. But since farm in “pure” form because of the impossibility to have struts on the front is hardly possible, although the inclined cross connection in the aperture of front glass of cab and does not contradict the requirements of field of view, has sense to speak about skeleton type frame, where only the sidewalls and the top of body to a greater or lesser extent answer the classical determination of farm.
Źródło:: Journal of KONES; 2011, 18, 1; 10-14
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Combined control of hydropneumatic springs of the vehicle
Autorzy:: Liashenko, M.
Podzorov, A.
Shekhovtsov, V.
Prytkov, V.
Cherkashina, E.
Powiązania:: https://bibliotekanauki.pl/articles/247202.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: controlled suspension system
ride comfort
hydropneumatic spring
road tests
spatial mathematical model
vehicle
Opis:: The article is devoted to research of a vehicle ride comfort, equipped the suspension system with combined control of springing and damping elements. The spatial mathematical model of a vehicle which meets the requirements of adequacy to real object was developed. The results of the computer simulation of movement of the vehicle with controllable and passive suspension systems on stochastic microprofile are presented. It can be concluded that the spatial multi-mass model is satisfactory close to a real object and can be used for further calculations. Having analyzed simulation results we can state significant increase of ride comfort of a vehicle equipped with a controlled suspension system. Decrease of vertical acceleration of a cabin in a place where a driver sits amounted to 40% in average that can be considered as a limit value for this type of controlled suspension systems. It can be noted that a suspension system with combined control of springing and damping elements can be considered as rather effective in terms of decreasing load of vehicle spring-mounted parts that along with low power consumption makes it rather competitive. The shown research results and control laws for springing and damping elements can be used as a basis for development of relatively simple controlled suspension systems.
Źródło:: Journal of KONES; 2011, 18, 4; 229-234
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Decreasing of dynamic loading of tractor’s powertrain by means of change of reactive element torsional stiffness
Autorzy:: Kalmikov, A. V.
Sokolov-Dobrev, N. S.
Shekhovtsov, V. V.
Ljashenko, M. V.
Potapov, P. V.
Powiązania:: https://bibliotekanauki.pl/articles/242814.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: dynamic load
power train
dynamic model
torsional vibration
caterpillar tractor
Opis:: This article describes original method proposed by authors that provides decreasing of dynamic loading of tractor’s powertrain by means of change of reactive element torsional stiffness. In tracked vehicles one of the most loaded elements is final drive unit which loaded by high dynamic modes. In tractor Chetra 6C-315, final drive is epicyclic where stopped element is ring gear. Authors propose using of strictly resilient (5 degrees in forward-backward direction) mount of ring gear instead of stiffening. Design study of installation between hub and gear ring that connects drum and crown gear, of the resilient metal plates pack was performed. This pack is kind of elastic coupling. Resilient packets of coupling sustain loads and smooth over peak dynamic loads and after elastic deformation of these packets rigid coupling between hub and coupling crown is provided at contact surfaces of skewed stops of hub and crown. To analyse efficiency of proposed method of dynamic loadings decreasing of powertrain elements three-dimensional model of powertrain was created in “Universal Mechanism”. In addition, solid model of caterpillar mover was created in the same software for analysis of influence on powertrain loadings of complex of kinematic and dynamic factors influencing forming of torque on driving sprockets. This article presents results of modelling of loading processes in powertrains elements with elastic coupling and without it during longitudinal motion at various speeds and in turns with various radii. Results show that elements dynamic loading at high loading dynamic modes in case of installed coupling is decreased by 20-30%.
Źródło:: Journal of KONES; 2015, 22, 1; 127-134
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Development of Growth Technologies for the Photonic Single Crystals by the Czochralski Method at Institute for Single Crystals, NAS of Ukraine
Autorzy:: Kosmyna, M.
Nazarenko, B.
Puzikov, V.
Shekhovtsov, A.
Powiązania:: https://bibliotekanauki.pl/articles/1399466.pdf
Data publikacji:: 2013-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.10.Fq
42.70.Hj
42.70.Mp
29.40.Mc
Opis:: The present paper briefly overviews the application of the Czochralski method for growth of a set of oxide crystals for photonics, as well as the design of equipment at the Institute for Single Crystals, NAS of Ukraine. The examples of crystal growth and their characterization are described. The simultaneous Q-switched lasing and self-Raman frequency conversion were demonstrated in Nd-doped $PbWO_4$ and $PbMoO_4$ crystals grown by the Czochralski method. The slope lasing efficiency obtained for a $PbMoO_4:Nd^{3+}$ laser is the best result for all the crystals with the scheelite-type structure. A detection unit with high scintillation characteristics based on a large volume (V ≈ 350 cm^3) $CdWO_4$ crystal was produced. Crystal growth procedures and properties of new double tungstate and vanadate crystals are presented, too.
Źródło:: Acta Physica Polonica A; 2013, 124, 2; 305-313
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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