| Abstrakt: |
The Discrete Element Method in the Simcenter STAR-CCM+ software package was used to analyze the new designs of the tillage module and study their interaction with the soil. As a result of numerical simulation of the process of interaction of various designs of tillage modules (2 drums + ploughshare, 1 drum, 1 drum + plowshare, 1 drum + plowshare + casing, 1 drum + plowshare + casing + cleaner) for pre-sowing cultivation with the soil, a visualization of the scalar scene was obtained and histograms of the distribution of aggregates by their diameter and placement depth. As a basic (control) design, a two-drum-blade separator was chosen (design by I. A. Shevchenko, R. M. Kryzhachkivskyi, O. S. Kovyazyn, and V. V. Trachova), numerical modeling of which made it possible to establish that after processing in the layer 0-4 cm, the content of the 10-20 mm fraction was 64.8 ± 0.3%, and the 20-30 mm fraction was 24.5 ± 0.3% (total - 89.3 ± 0.3%), in in the 4-8 cm layer, the content of the 0-10 mm fraction was 76.3 ± 0.3%. The obtained data are confirmed by the experiment of I. A. Shevchenko, which testifies to the adequacy of the created numerical model in Simcenter STAR-CCM+ and the correctness of accepting the physical and mechanical properties of the soil environment. According to the results of numerical modeling, it was established that the most effective design is the one that contains 1 drum, ploughshare, casing and cleaner, as it performs the operation of separation and redistribution of soil aggregates with almost the same efficiency as the basic (control) design. This is evidenced by the content of the 10-30 mm fraction in the 0-4 cm layer -- 87.8 ± 0.3% and the content of the 0-10 mm fraction in the 4-8 cm layer -- 83.5 ± 0.3%. [ABSTRACT FROM AUTHOR] |
