Estimating the dynamics of a machine-tractor assembly considering the effect of the supporting surface profile

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.225117

Keywords:

machine-tractor assembly, mathematical model of the wheel, profile of bearing surface, amplitude of vibration accelerations, spectral density of profile height

Abstract

Results of theoretical studies of dynamics of the machine-tractor assembly taking into account the influence of a bearing surface profile were presented. It was established that in the course of operation, the machine-tractor assembly is exposed to a number of external factors leading to a change of vertical loads on the chassis and the engine. Mathematical models of dynamics of a tractor and a machine and a tractor unit consisting of a tractor of pivotally connected arrangement and a trailed sower were constructed. Such models make it possible to study dynamics and oscillatory processes of multi-element units. A mathematical model of tractor wheel dynamics was formed. Speeds and angles of orientation of elements of the machine-tractor assembly in space were determined. Influence of profile of the bearing surface on the unit elements when moving in the field prepared for sowing and the field after plowing was calculated. Theoretical studies of the influence of the bearing surface profile on dynamics of the machine-tractor assembly were performed on the example of KhTZ-242K tractor and Vega-8 Profi sower (Ukraine). When moving, the sower frame has a smaller amplitude of vibration accelerations than that of the tractor. Accordingly, the tractor has higher oscillation energy because it rests on the ground through its wheels having appropriate stiffness. The sower moves with its working bodies immersed into the soil which leads to a decrease in the amplitude of oscillations. The highest energy of amplitude of oscillation accelerations of the sower frame in the vertical direction was observed at frequencies of 15.9; 23.44; 35.3 and 42.87 Hz. It was found that the increase in working speeds of agricultural units leads to the fact that oscillations of all components reach significant values. This entails an increase in dynamic loads on soil and, as a consequence, its compaction

Author Biographies

Ivan Galych, Kharkiv Petro Vasylenko National Technical University of Agriculture

Senior Lecturer

Department of Mechatronics and Machine Parts

Roman Antoshchenkov, Kharkiv Petro Vasylenko National Technical University of Agriculture

Doctor of technical sciences, Associate Professor, Head of Department

Department of Mechatronics and Machine Parts

Viktor Antoshchenkov, Kharkiv Petro Vasylenko National Technical University of Agriculture

PhD, Associate Professor

Department of Tractors and Automobiles

Igor Lukjanov, Kharkiv Petro Vasylenko National Technical University of Agriculture

PhD, Associate Professor

Department of Equipment and Engineering of Processing and Food Production

Sergey Diundik, National Academy of National Guard of Ukraine

PhD, Associate Professor

Department of Armored Vehicles

Oleksandr Kis, Kharkiv National University of Radio Electronics

Department of Electronic Computers

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Published

2021-02-22

How to Cite

Galych, I., Antoshchenkov, R., Antoshchenkov, V., Lukjanov, I., Diundik, S., & Kis, O. (2021). Estimating the dynamics of a machine-tractor assembly considering the effect of the supporting surface profile . Eastern-European Journal of Enterprise Technologies, 1(7 (109), 51–62. https://doi.org/10.15587/1729-4061.2021.225117

Issue

Vol. 1 No. 7 (109) (2021): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2021 Иван Васильевич Галич, Роман Викторович Антощенков, Виктор Николаевич Антощенков, Игорь Михайлович Лукьянов, Сергей Михайлович Дюндик, Кись Александр Викторович Кись

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