Mathematical model of a root harvester after-cleaning system

Hevko, Roman Bohdanovych; Tkachenko, I.G.; Hlado, Y.B.; Synii, Sergii; Gandziuk, M.O.; Trokhaniak, O.M.

doi:10.31489/2019m4/81-89

Cited by 5 publications

(4 citation statements)

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“…Furthermore, the source of such oscillations can be the pneumatic doubler wheels that the cleaners are equipped with. R. Hevko et al (2014;2018) and M. Budzanivskyi (2022) studied bunchers, cleaners, and root harvesters under modelling conditions that involve the use of significantly simplified equivalent circuits. This, in turn, leads to the use of initial equations based on the basic law of dynamics.…”

Section: Methodsmentioning

confidence: 99%

Development of the theory of root crop head cleaner movement in the longitudinal-vertical plane mounted behind a wheeled tractor

Budzanivskyi

2023

Tehnìka ta energetika

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The relevance of developing analytical methods for studying the stability of root crop cleaners on tractors is determined by the need to improve the efficiency and quality of root crop head cleaning, as this affects the quality of the final product and its marketable properties. The research aims to increase the stability of the cleaner movement by constructing a mathematical model of its oscillatory motion in the longitudinal-vertical plane and its numerical solution to determine the influence of parameters in response to external disturbances. To achieve this goal, a new theory of the movement of a root crop head cleaner in the longitudinal-vertical plane, mounted behind a wheeled tractor, under the influence of the disturbing effect of irregularities in the longitudinal profile of the soil surface on the amplitude and phase frequency characteristics of its angular oscillations was developed. Using numerical calculations carried out on a personal computer, the conditions were found under which the stability of the cleaner’s movement in the specified plane will increase when the stiffness coefficient of the pneumatic tyres of the doubler wheels is 315 kN×m–1. This result is achieved when the pressure in the pneumatic wheel tyres is 135 kPa. As for the damping characteristics of the doubler wheel tyres, which are determined by the coefficient μ, it was found that when it changes from 350 N×s×m–1 to 1350 N×s×m–1, there is an invariance of the delay in the reaction of the cleaner to the disturbing effect when its frequencies change from 0 to 24 s–1. It was also found that the influence of the geometric dimensions of the cleaner is insignificant in the range of frequencies of oscillations of the ordinates of the longitudinal profile of soil surface irregularities from 0 to 24 s–1. This follows from the nature of changes in the obtained amplitude-frequency and phase-frequency characteristics. The methodology for constructing a mathematical model of the plane-parallel oscillatory motion of the cleaner can be used in similar analytical studies of other agricultural machines mounted on a wheeled aggregating tractor

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Section: Methodsmentioning

confidence: 99%

Development of the theory of root crop head cleaner movement in the longitudinal-vertical plane mounted behind a wheeled tractor

Budzanivskyi

2023

Tehnìka ta energetika

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“…at first the partial derivatives must be taken and only after that the integration can be performed) or other approaches [16,17] which make the calculations faster and simpler. To analyze the distribution of efforts in the bearing structures of the machine it's quite reasonable to use some computational investigation based on the simulation models [18][19][20][21].…”

Section: Methodsmentioning

confidence: 99%

Investigation of internal efforts in the components of the crop sprayer boom section

Hevko

Stashkiv

Lyashuk

et al. 2021

Journal of Achievements in Materials and Manufacturing Engineering

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Purpose: Development results allow the defects in the boom section of a crop spraying machine design to be found, the most loaded structural components to be determined and the most suitable design parameters to be chosen. Design/methodology/approach: Results of theoretical investigation of internal forces distribution in the components of a boom section of a crop spraying machine in the static statement of the problem have been presented. The applied under discussion enables the static indeterminacy to be realized whilst calculating the complex frame structures though it requires not only considerable records of the function of potential energy of deformation (even without taking into account the function of potential energy of deformation of normal and lateral forces) but application of applied computer programs. The technique of static indeterminacy realization by minimum of potential energy of deformation (MPED) method has been used to calculate the framework. Findings: Technique of static indeterminacy realization by minimum of potential energy of deformation (MPED) method has been used to calculate the framework. The results of theoretical calculation and simulation of the boom section of a crop spraying machine have been compared. The results of analytical calculation have been checked by the simulation of 3D model of the using the program complex «Lira-SAPR», where the finite elements method (FEM) has been implemented. Research limitations/implications: Horizontal components of the shear forces as well as the normal forces and as a consequence the corresponding potential deformation energy are neglected, which has some effect on the accuracy of the calculations. Practical implications: An effective tool for strength analysis with preliminary assessment and diagnostics structures based on the constructed calculation models of stress strain state load-bearing frames of typical geometry with an arbitrarily given distribution of external load. Originality/value: A universal algorithm records of the function of torque and bending moment, as well as the function of potential deformation energy of a spraying machine boom section.

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“…The efficiency and operational parameters of the technological process of the work of root-harvesting machine during the harvesting of root crops are characterized first of all by its functional indicators of the quality of work and productivity (throughput) of the main transport and technological systems (Baranovsky, 2007;Hevko et al, 2017).…”

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confidence: 99%

Theoretical and Experimental Investigations of the Second Serve of Root Crop Pile Components

Baranovsky

Jobbágy

Marynenko

et al. 2023

Acta Technologica Agriculturae

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Fodder beet root crops in the autumn-winter period are one of the main types of juicy fodder for dairy livestock. Mechanized harvesting of fodder beet roots is a rather complex and energy-consuming technological process. The criteria that meet the requirements for the operation of root-harvesting machines are first of all the quality of digging and separation of impurities from root crops. The purpose of the work was improvement of the process of mechanized digging of fodder beets by an adapted digging-transport combined working body based on analytical and empirical research of the second feeds of constituent components of the dug pile of root crops. Based on the results of experimental studies, empirical regression equations were developed, which functionally describe the change in the second supply of the excavated components of the pile of root crops, depending on the speed of the root-harvesting machine and the rotation frequency of the drive shaft of the adapted digging-transport combined working body. Based on the comparative analysis, it was found that the discrepancy between the theoretical and approximated experimental values of second feeds is 5–10%. The results of the study are a further step in improving the method of optimizing the parameters of working bodies for digging and cleaning root crops from impurities.

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Mathematical model of a root harvester after-cleaning system

Cited by 5 publications

References 0 publications

Development of the theory of root crop head cleaner movement in the longitudinal-vertical plane mounted behind a wheeled tractor

Development of the theory of root crop head cleaner movement in the longitudinal-vertical plane mounted behind a wheeled tractor

Investigation of internal efforts in the components of the crop sprayer boom section

Theoretical and Experimental Investigations of the Second Serve of Root Crop Pile Components

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