Scientific Journal of KubSAU

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

Zubrilina Elena Mixailovna

Scholastic degree

Academic rank

Honorary rank

Organization, job position

Stavropol State Agrarian University
   

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Articles count: 3

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213 kb

FEATURES OF TECHNICAL RISK ASSESSMENT UNDER NON-DETERMINISTIC STOCHASTIC PARAMETERS

abstract 1461902002 issue 146 pp. 0 – 0 28.02.2019 ru 19
The article considers a variant of parametric representation of a complex product of single use in the process of its creation during tests, when structural failures of the product or its components in one or more parameters specified in the technical specification require modifications leading to a change in the general amount and repeating of the tests, but it is possible to reduce the volume of tests by taking into account a priori information. This is especially up-to-date while ensuring the reliability of complex single – use products, the components of which are first stages of ground tests, and only then as part of complex products-the stages of flight tests. Structural failure of any component of such a product at the stage of ground tests does not lead to such consequences as if it occurred during flight tests as part of the product. Meanwhile, the refinement of the component element of a single-use product, the structural failure of which occurred at the stage of flight tests as part of the product, and the assessment of its effectiveness, can be carried out at the stage of ground tests, in the case of consideration of a complex product in parametric form. This can significantly reduce the cost of flight testing of a complex product, in the case of effective completion of the component element of the product at the stage of ground tests, without a significant (temporary) decrease in the overall reliability of a complex single-use product
782 kb

METHODS AND RESULTS OF THE SEED MATERIAL FRICTION COEFFICIENT DETERMINING USING AN AUTOMATED DEVICE

abstract 1471903004 issue 147 pp. 0 – 0 29.03.2019 ru 35
The article describes the automated method of friction coefficient determination of row crops seeds using different types of surface, including modern polymer and composite materials. It is revealed that the friction coefficient characterizes the friction properties of seeds arising in the process of mechanical action during harvesting, transportation, storage and processing, as well as changes over time depending on the state of the surfaces, contact time, humidity, relative velocity and other parameters. The problem of lack of friction coefficients values for rest and dynamic friction coefficients for the polymeric and composite materials which are actively applied today at industrial production of agricultural machinery is designated. The design and general view of the device which helps to determine friction coefficient excluding the human factor (operator error) are presented. The operation principle of the developed device is described and the processing method of experimental data is given. Experimental data were obtained and statistical processing was carried out to identify the static and dynamic friction coefficients of seeds. Integral ( ) and differential ( ) graph for the distribution of friction coefficient average values for pairs "type of seed material – type of friction surface" are constructed
172 kb

RESEARCH OF THE FACTORS DETERMINING THE QUALITY OF THE SURFACE WHILE DETAILS RESTORATION WITH THE METHOD OF THERMO DYNAMICAL HARDENING

abstract 0811207065 issue 81 pp. 863 – 875 30.09.2012 ru 1045
The comparison of the quality of the processing of surfaces of shafts made of various materials with cold and hot deformation in the repair of worn-out parts of agricultural machinery has been made in the article. The technique of the experiments was proposed. The effect of the treatment regimes on the quality of the surface layer (surface roughness) of the details was examined
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