scholarly journals Study of the process of preparing feeding mixtures using the composite mixer

2018 ◽  
Vol 5 (1) ◽  
pp. 17-22 ◽  
Author(s):  
M. Chernovol ◽  
M. Sviren ◽  
R. Kisiliov
Keyword(s):  
Mathematical Modeling ◽  
Slope Angle ◽  
Mixing Process ◽  
Solid Mass ◽  
Technological Parameters ◽  
Effi Ciency ◽  
Paddle Mixer ◽  
Working Bodies ◽  
The Impact ◽  
The Mathematical Model

Aim. Enhancing the quality and improving the technological process of mixing feeds using the new con- struction of the mixer and substantiating its rational parameters. Methods. Mathematical modeling theories, fundamentals of using machinery in animal breeding. Results. The estimated model of the functioning of a constructive-technological scheme of a composite mixer and the mathematical model of the dynamic interac- tion of mixer paddles and the solid mass of feeds were elaborated. It was established that the technological effi ciency of preparing the homogeneous mixture depends on physical and mechanic properties of its compo- nents, the impact and interaction between the form and geometric parameters of the attacking surface of the paddles, the slope angle, the setting increment and working modes of the mixer. Conclusions. The results of the studies confi rm the possibility of enhancing the effi ciency of the technology of preparing completely balanced feeding mixtures for cattle via the intensifi cation of the mixing process using the construction of the composite belt-paddle mixer, the elaboration of theoretical fundamentals of the interaction of feed components with the working bodies and substantiating their main constructive and technological parameters.

scholarly journals MATHEMATICAL MODELING OF THE FOREST FIRE IMPACT ON THE BRANCH OF A CONIFEROUS TREE

2021 ◽  
Vol 4 (2) ◽  
pp. 1-15
Author(s):  
N.V. Baranovskiy ◽  
◽  
D. S. Menshikov ◽  
Keyword(s):  
Mathematical Modeling ◽  
Forest Fire ◽  
Quantitative Methods ◽  
Heat Propagation ◽  
Coniferous Tree ◽  
Flame Zone ◽  
Fire Front ◽  
Tree Branch ◽  
The Impact ◽  
The Mathematical Model

It is necessary to develop quantitative methods to assess the formation of thermal burns in the morphological parts of coniferous trees. The purpose of the study can be formulated as follows: mathematical modeling of heat transfer in the layered structure of a coniferous tree branch under the influence of a forest fire front. The heat propagation in the “branch-needles-flame zone” system is described by a system of non-stationary differential equations of heat conduction with the corresponding initial and boundary conditions. As an object of research, a digital model of a branch of a coniferous tree for various species, namely, pine, larch and fir, was used. Temperature distributions are obtained for different variants of the branch structure and conditions of the impact of the forest fire front. Conclusions are made about the need for further modernization of the mathematical model. The developed model is the basis for creating software tools for specialized geographic information systems.

Mathematical Modeling and Optimization of Fluidized Layer Carbonitriding Process for 1C 25 Steel

2017 ◽  
Vol 1143 ◽  
pp. 180-187
Author(s):  
Marian Iulian Neacsu ◽  
Sorin Dobrovici
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Software Package ◽  
Order Equation ◽  
Graphical Interface ◽  
Technological Parameters ◽  
Fluidized Layer ◽  
The Mathematical Model ◽  
Hardness Values ◽  
Temperature Depth

This paper presents the experiment-based mathematical modelling of fluidized bed carbonitriding process for 1C 25 steel meant to optimize this type of thermochemical processing.Based on experimental results, the mathematical model was developed, which is a second order equation with three unknown terms (parameters): temperature, depth of carbonitrided layer, the percentage of ammonia.The mathematical model allowed the simulation of the fluidized layer carbonitriding process according to its parameters and the thermal energy optimization for obtaining HV hardness values in the range 300-400 MPa.Using the software package Matlab a graphical interface was done, through which all the combinations of technological parameters of the carbonitriding process are determined, leading to obtaining values of microhardness between 300 and 400 MPa, as well as the amount of energy consumed for each variant. The variant consuming the lowest energy is considered optimal.

Experimental Research on the Influence of the Open Mill Mixing Process Technological Parameters on the Mixing Quality

2013 ◽  
Vol 561 ◽  
pp. 400-404
Author(s):  
Xian Kui Zeng ◽  
Dong Wang ◽  
Shuai An ◽  
Shu Hong Zhao ◽  
Guo Zong Song
Keyword(s):  
Experimental Study ◽  
Mixing Time ◽  
Speed Ratio ◽  
Mixing Process ◽  
Experimental Equipment ◽  
Technological Parameters ◽  
Roller Speed ◽  
Experimental Platform ◽  
Mixing Quality ◽  
The Impact

This experiment adapt orthogonal experimental method, producing the experimental study on the impact of the open mill mixing process technological parameters on the mixing quality, using the open mill intelligent mixing experimental platform which are designed and developed dependently and a variety of advanced experimental equipment. Finally, find the optimal technological parameters for the open mill mixing process, and are the roller spacing 0.6mm, the best roller speed 29r/min, the best roller speed ratio 1.25, the best mixing temperature50°C, the best mixing time 18.5min, respectively.

scholarly journals Mathematical Modeling of the Resistance of Pulling out Steel Bars from High Strength Concrete

2018 ◽  
Vol 7 (3.2) ◽  
pp. 516 ◽  
Author(s):  
Yevgenij Babych ◽  
Sergij Filipchuk ◽  
Oleksiy Fenko
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
High Strength Concrete ◽  
High Strength ◽  
Strength Concrete ◽  
Steel Bars ◽  
Specific Factors ◽  
The Impact ◽  
Experimental Researches ◽  
The Mathematical Model

The article gives the results of the experimental researches of the bond between steel and high strength concrete. According to these results the mathematical model was built to define the boundary stresses of the bond between steel and concrete on their contact surface. The analysis of the impact of the specific factors on the boundary stresses of the bond between steel and concrete was carried out. 

scholarly journals Impact Force Magnitude Analysis of an Impact Pendulum Suspended in a Vibrating Structure

2012 ◽  
Vol 19 (6) ◽  
pp. 1359-1372 ◽  
Author(s):  
R.R. Aguiar ◽  
H.I. Weber
Keyword(s):  
Mathematical Modeling ◽  
Experimental Data ◽  
Mathematical Model ◽  
Impact Force ◽  
Experimental Measurements ◽  
Force Magnitude ◽  
Force Profile ◽  
The Rich ◽  
The Impact ◽  
The Mathematical Model

The purpose of this work is the experimental investigation and the mathematical modeling of the impact force behavior in a vibro-impact system, where an impact pendulum is mounted on a cart that moves with a prescribed displacement. The dynamics of the system will be evaluated considering different excitation frequencies and changing the impact gap. Experimental data are used to validate the mathematical model. The mathematical model allows a detailed nonlinear analysis, showing the rich response of the system, which includes dynamical jumps, bifurcations and chaos. In impact systems, discrepancies between numerical results and experimental measurements are common due to the difficulty in describing all factors that influence the resulting impact force profile. The use of wires to suspend the impacting body has the purpose to limit these uncertainties.

Productivity of corn hybrids of different fao groups depending on microfertilizers and growth stimulants under irrigation in the south of Ukraine

2016 ◽  
Vol 3 (1) ◽  
pp. 55-60
Author(s):  
Yu. Lavrynenko ◽  
R. Vozhegova ◽  
O. Hozh
Keyword(s):  
Grain Quality ◽  
Laboratory Method ◽  
The South ◽  
Corn Hybrids ◽  
Early Maturity ◽  
Effi Ciency ◽  
Grain Moisture ◽  
Grain Productivity ◽  
The Impact

The purpose of the research is to identify effi cient microfertilizers and growth stimulants considering biologi- cal features of new corn hybrids of different FAO groups under irrigation conditions in the South of Ukraine and trace their impact on grain productivity of the plants. The methods of the research are the fi eld method – to study the interaction of the research object with experimental factors of the natural environment, to register the yield and evaluate the biometrical indices; the laboratory method – to measure soil moisture, grain moisture content and grain quality indices; the statistical method – to evaluate the reliability of the obtained results; the calculation methods – for economic and energetic assessment of the growing techniques used. The results of the research. The paper defi nes the impact of microfertilizers and growth stimulants on the yield and grain quality of the corn hybrids of different maturity groups and on the economic effi ciency of growing them. The conclusions of the research. Under irrigation conditions of the Southern Steppe of Ukraine it is recommended that the following hybrids should be grown in dark-chestnut soils: early maturity DN Pyvykha, medium-early Skadovskyi, medium maturity Kakhovskyi and medium-late Arabat, using the growth stimulants – treating the seeds with Sezam-Nano and fertilizing with Grainactive at the stage of 7–8 leaves.

Peculiarities of tool material wear at polymeric composite blank cutting

2018 ◽  
Vol 2018 (7) ◽  
pp. 27-31
Author(s):  
Юрий Зубарев ◽  
Yuriy Zubarev ◽  
Александр Приемышев ◽  
Alexsandr Priyomyshev
Keyword(s):  
Tool Wear ◽  
Tool Material ◽  
Polymeric Composite ◽  
Physical Models ◽  
Technological Parameters ◽  
Tool Materials ◽  
Materials Used ◽  
The Impact ◽  
Material Wear

Tool materials used for polymeric composite blank machining, kinds of tool material wear arising at machining these blanks, and also the impact of technological parameters upon tool wear are considered. The obtained results allow estimating the potentialities of physical models at polymeric composite blanks cutting.

scholarly journals Results of Laboratory Studies of the Automated Sorting System for Root and Onion Crops

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1257
Author(s):  
Alexey Dorokhov ◽  
Alexander Aksenov ◽  
Alexey Sibirev ◽  
Nikolay Sazonov ◽  
Maxim Mosyakov ◽  
...  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Technological Parameters ◽  
Post Harvest ◽  
Manual Sorting ◽  
Sorting System ◽  
Working Bodies ◽  
Automatic Removal

The roller and sieve machines most commonly used in Russia for the post-harvest processing of root and tuber crops and onions have a number of disadvantages, the main one being a decrease in the quality of sorting due to the contamination of working bodies, which increases the quantity of losses during sorting and storage. To obtain high-quality competitive production, it is necessary to combine a number of technological operations during the sorting process, such as dividing the material into classes and fractions by quality and size, as well as identifying and removing damaged products. In order to improve the quality of sorting of root tubers and onions by size, it is necessary to ensure the development of an automatic control system for operating and technological parameters, the use of which will eliminate manual sorting on bulkhead tables in post-harvest processing. To fulfill these conditions, the developed automatic control system must have the ability to identify the material on the sorting surface, taking into account external damage and ensuring the automatic removal of impurities. In this study, the highest sorting accuracy of tubers (of more than 91%) was achieved with a forward speed of 1.2 m/s for the conveyor of the sorting table, with damage to 2.2% of the tubers, which meets the agrotechnical requirements for post-harvest processing. This feature distinguishes the developed device from similar ones.

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