Scientific Journal of KubSAU

Polythematic online scientific journal
of Kuban State Agrarian University
ISSN 1990-4665
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Sokolenko Oksana Nikolaevna

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Kerch state maritime technological university
   

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Articles count: 2

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ON THE ISSUE OF SUBSTANTIATION OF THE DESIGN SPECIFICATIONS ON MECHANICAL SYSTEM WITH RIGID ELASTIC LOADCARRYING COMPONENTS

abstract 1181604063 issue 118 pp. 1037 – 1049 29.04.2016 ru 275
The main reason of the developmental delay of the RF livestock sector below the level of its inherent potential capacity is a detrimental alteration in methodological procedure of livestock and poultry management, occurring due to shortage of traditional feeds. As a result, a necessity to develop the yearlong production of additional fodders, allowing for balanced feeding throughout the year, arose. The method of hydroponic green fodder (HGF) cultivation meets these requirements. Analysis of HGF production methods and labor saver mechanisms makes possible to claim that existing systems are characterized by high costs and difficulties in fabrication, and require a number of additional mechanical devices to work. In the FSBEI HE “KSMTU”, a one-tier hydroponic system has been developed, fitted with curved (arched) guideways and rigid elastic load-carrying components, where loading of seeds and takeout of grown HGF occur by gravity without additional devices of labour input. Based on analysis performed on design features of the proposed system, it has been established that emergence of parametric resonances in the system under consideration is possible; and the study of tray dynamical stability has been carried out with the aim to prevent them. The motion of the hydroponic system tray under consideration is described by the classical Mathieu equation, including two parameters a and q. The further studies of sets of stable and unstable solutions in the plane of a and q parameters are presented by the Ince-Strutt diagram. As a result of the performed calculations, the diameter of the loadcarrying component was identified (d=5 mm), which should ensure reliable working capacity and stability of the hydroponic system in whole
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THE STUDY OF THE PROCESS OF SEED DISPERSAL OVER THE PLANT GROWING SURFACE OF A TRAY IN HYDROPONIC SYSTEM

abstract 1091505078 issue 109 pp. 1117 – 1131 29.05.2015 ru 537
The low rate of planting and harvesting mechanization is a common drawback of the equipment for hydroponic green fodder (HGF) cultivation. The system, that has been developed, is represented by a rack construction with a tray positioned on each rack; a tray is the place where the processes of seed dispersal and growth and the takeout of grown HGF occur. A tray with a pipe sways in opposite directions over pipe axis, and, as a result, moving bulk of seeds covers the entire tray surface with a seed layer of uniform thickness. The mathematical model of dynamics in the “granular medium – tray” system has been developed; on the basis of this model, after execution of simulation modeling, practical angles of tray tilt were identified as being within the range of 20 – 30 degrees. Experimental investigations have been carried out on the barley of “Vakula” cultivar with seed moisture contents 10%, 14%, 16% and 18%. During the research, the main factors influencing the process under consideration were identified: the moisture content in barley seeds; initial angle of tray tilt; the number of tray swaying motions. It was determined that the increase of tray filling rate can be achieved by means of setting up the initial angle of its tilt from a reference level, which depends on the moisture content in the barley seeds used in the process of HGF production. This angle is 22 – 24 degrees for the dry barley seed with moisture content 10-14% and 25 – 27degrees for the barley seed with higher moisture content. The upper limit of moisture content in the seeds used in work process should be specified to achieve high quality of a final product. The barley seeds with moisture content 10-15% and the angles of tray tilt 23 – 25 degrees should be used during HGF production
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