Scientific Journal of KubSAU

Polythematic online scientific journal
of Kuban State Agrarian University
ISSN 1990-4665
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Name

Kravchenko Ludmila Vladimirovna

Scholastic degree


Academic rank

associated professor

Honorary rank

Organization, job position

Azov-Blacksea State Agroengineering Academy
   

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Articles count: 2

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MATHEMATICAL MODEL OF A MACHINE AND TRACTOR UNIT WITH EDM IN TRANSMISSION OF A TRACTOR

abstract 1031409016 issue 103 pp. 251 – 261 30.11.2014 ru 701
The developed mathematical model of the machine and tractor unit with the elastically damping mechanism in transmission of a tractor is given in the article. The analysis of mathematical model of the arable unit on the basis of a tractor with EDM in transmission showed that the MTU mathematical model can be considered as working
295 kb

MATHEMATICAL MODELING OF THE UNIFORMITY OF WATERING WITH A SPRINKLING MACHINE OF CONTINUOUS PROGRESSIVE MOVEMENT ACCORDING TO THE RESULTS OF THE TEST OF THE UNIT WITH A RADIAL METHOD

abstract 1281704014 issue 128 pp. 229 – 239 28.04.2017 ru 84
The aim of the study was to improve evaluation of the uniformity of irrigation with a machine of continuous translational motion, according to the test results of the apparatus with radial methods. Research method – mathematical modeling of the running of four machines of circular actions on a device of continuous translational motion using the result of the tests of the device with a radial method. The algorithm of calculation, recommended by the standard ISO 7749-2-2004, has been improved to minimize manual calculations and measurements. The algorithm is implemented in a computer program. Program of CDU(B) implements an advanced algorhythm. The program calculates a matrix of irrigation doses on meter squares area of spray irrigation between the positions of the two devices. The progressive movement of the machine is modeled by summing the doses in column-major order with constant X. At vector doses after the passage of the machine, it calculates the coefficient of uniformity of irrigation by Christiansen. The calculation is performed at different steps of the installation of devices, and so it determines the optimal location of them. The improved algorithm of calculating the figures of sprinkling uniformity using the test results for devices using a radial method was implemented in the program of the CDU(A) [1]; it allows to choose the optimal step for installation of devices. The algorithm of calculating the uniformity in the step of installation of the apparatus on the pipeline which is greater than the radius of the irrigation apparatus simulates the operation of two devices. During the installation step of the apparatus of smaller radius than irrigation apparatus, we model the work of four adjacent devices. The optimal step of installation of i-Wob is 14.5 meters, which is 1.75 times greater than the radius of the irrigation system and 1.5 times greater than the pitch of stationary devices with the same tolerance on the uniformity. Two-nozzle devices, which assessment standard does not meet the requirements of the uniformity of irrigation at the drive of the translational motion ensures a better distribution in the pitch of less than 24 meters
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