Journal of Engineering Sciences / Журнал інженерних наук
Permanent URI for this collectionhttps://devessuir.sumdu.edu.ua/handle/123456789/34326
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Item Geometric modeling of disc furrow profile(Sumy State University, 2025) Yablonskyi, P.; Rogovskii, I.; Virchenko, G.; Borek, K.; Volokha, M.; Golova, O.The provision of sufficient quantities of food products for the population of our planet is currently an urgent global problem. One of the main approaches to successfully solving these critical issues is to improve agriculture and its technical tools, particularly tillage discs. The latter’s popularity is due to modern progressive trends in minimal tillage. Compared to plows, discs significantly reduce energy costs, contribute to soil moisture preservation, and improve anti-erosion factors. In this regard, integrated CAD/CAM/CAE/PLM systems are productive tools for practically implementing the described tasks. However, their effective functioning is impossible without developing appropriate mathematical models. This scientific publication is devoted to solving such a problem by creating an analytical geometric apparatus for forming furrow profiles depending on available diameters and installation angles of tillage discs. Simultaneously, the current trends in the construction of agricultural machinery regarding the placement of disc working bodies on individual risers with the regulation of required angles of attack and deviations from vertical were considered. The developed mathematical calculations were illustrated by corresponding graphic images of furrow profiles for specific values of indicated quantities. This research also outlines promising directions for further research on the topic under consideration. Overall, the article aims to solve the problems using the integrated processing of structural and functional parameters and characteristics for agricultural discs.Item Computational approach to geometric modeling of plow bodies(Sumy State University, 2024) Yablonskyi, P.; Rogovskii, I.; Sobczuk, H.; Virchenko, G.; Volokha, M.; Vorobiov, O.In this article, a detailed analysis of modern research and publications on the selected subject was carried out related to the computer-variant geometric modeling of the working surfaces of the plow blades. Based on this, a new method of proper design was proposed. The performed scientific investigations aimed to create a flexible, productive, and universal approach for the automated shaping of tillage tools. The accentuated effectiveness of geometric modeling was achieved using a developed special mathematical apparatus adapted for use in the environment of current computer information systems of an engineering profile. The implementation was based on such parametric lines as heterogeneous rational B-splines, which are acceptable in automated design systems. The specified geometric models were characterized by the coverage of a sufficiently large range of plow heads. The indicated means of forming could conveniently adapt to the changing conditions of designing tillage tools suggested by theoretical calculations and practical experiments. The given facts contributed to the multifaceted clarification of the specified information. They also ensured the appropriate integration and the possibility of determining the most rational options among the studied varieties of plow dumps. Simultaneously, the most common group of dumps with cylindrical and other plow working surfaces was considered. The significant role of geometric models for qualitative coordination and the effective combination of many other models (e.g., strength, manufacturing technology, and operation conditions) was emphasized. This was aimed at comprehensive optimization throughout their life cycle, in this case of plows. The proper solution to the presented problems contributed to a successful solution to the actual scientific and applied problem of improving the quality of machinery.Item Modeling of transportation process in a technological complex of beet harvesting machines(Sumy State University, 2023) Volokha, M.; Rogovskii, I.; Fryshev, S.; Sobczuk, H.; Virchenko, G.; Yablonskyi, P.Based on a critical review of known research and developments in recent years, the article presents a methodology for analyzing the capacity of the sugar beet sweeping-transport complex. The research aims to find rational use of machinery resources in the technological complex. A reloading method of transportation of root crops was considered. Its peculiarity was flexibility, adaptability to weather, and climatic and economic conditions during the gathering of sugar beet. Under favorable weather conditions and the availability of a sufficient number of vehicles, dug roots, removed from the combine from the field by a tractor semi-trailer, were reloaded into the heavy trucks. They were on the road from the edge of the field and transported to the plant. In case of changing conditions (in rainy weather, when the soil was too wet, or when there were not enough vehicles), a cleaner loader was added to the machines complex. After, the production process was carried out in a transshipment or flow-transshipment way. Beet harvesting and transportation of root crops were considered as work of the technological chain, which consists of three links: “field – beet harvester”, “beet harvester – tractor semi-trailer”, and “tractor semi-trailer – vehicle”. The basic steps of the capacity analysis allowed for determining the capacity of the 1st, 2nd, and 3rd links, their comparison, and subsequent analysis and selecting rational options to overcome the possible difference between their values.