Browsing Новые горизонты by Author "Довнар, С. С."
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Бионическая реновация колонны тяжелого прецизионного станка с ЧПУ
Довнар, С. С.; Лапука, А. Д. (БНТУ, 2021)Bionic solution for reinforcement of “travelling column” machine is developed. It concerns special project of old heavy precise machine redesign and renovation. It is proposed to attach tree-like polymer-concrete outer bandage to the flexible column. Bionic-shape vertical console is created. Design is proved by FEA simulation. Static rigidity is increased twice. Bending eigenmode ...2022-03-03 -
Виртуальные испытания двойной несущей системы Пизанской башни
Довнар, С. С.; Лапука, А. Д.; Шведова, Д. Н.; Маненок, А. В. (БНТУ, 2022)FEA simulation of the double load-bearing system (LBS) for Pisa Tower is provided. Cylindrical trunk (T-LBS) is surrounded by 6-stage column system (C-LBS) in the telescopic manner. T-LBS is found out as the main object to bear the tower’s weight. Trunk is rigid and low-stressed. CLBS is partially (about 44 % of mass) hanging on the trunk by pliable cornices. Slender C-LBS is ...2023-01-26 -
Концепция конверт-усиления полимербетоном несущей системы 5-осевого многоцелевого станка с ЧПУ
Довнар, С. С.; Макаренко, К. Д.; Гринкевич, А. Г.; Хруцкая, Т. А. (БНТУ, 2022)Load-bearing system (LBS) of cubic-shaped multipurpose 5-axis CNC machine is investigated. Results of FEM-simulation are involved. Low stiffness of the machine could be improved by polymer concrete pouring into cavities of cast-iron structural parts. More perspective design pattern is to embrace machine LBS by concrete envelopes, inserted one-inside-other. It should provide outer ...2023-01-24 -
МКЭ-анализ и оптимизация жесткости чугуно-бетонного индексного стола для крупного многоцелевого станка
Довнар, С. С.; Макаренко, К. Д.; Николаев, Д. А. (БНТУ, 2021)FEA simulation of the huge indexing table for a multi-purpose machine tool is provided. Excessive corner flexibility of the initial design is revealed. A set of reinforcing design solutions is generated. Several combinations of cast iron ribs and polymer concrete inserts are analyzed. Corner rigidity is enhanced from 48.8 to 388.5 N/μm with table weight rising from 5.36 to 6.98 ...2022-03-03 -
МКЭ-анализ имплементации бионических консольных оболочек в дизайн вертикальных хранилищ
Довнар, С. С.; Лапука, А. Д.; Венслаускас, В. А. (БНТУ, 2021)FEM simulation of bionic console shells derived from shape variants of Adenium obesum socotranum plant is provided. A set of shell geometry models is developed. Plant contours similarity to the idealized equal-stress beam is stated. The usefulness of wall thickness control to shell structural stress alleviation is proved.2022-03-03 -
МКЭ-анализ комбинированного нагружения античной амфоры
Довнар, С. С.; Паращенко, К. М.; Козловский, С. Е. (БНТУ, 2020)FEA simulation of roman type amphora is provided. 3D-model is drawn from archeology issue. Four load cases are simulated including filled amphora hanging on the handles, vertical compression by standing man, pressurizing up to 1 bar level, side squeezing. Both tension as compression stress concentrators are revealed. It relates to the joints between handles and body so to the ...2021-01-26 -
МКЭ-анализ несущей системы башни Азинелли в Болонье
Довнар, С. С.; Лапука, А. Д.; Дулуб, А. Д.; Кустов, С. В. (БНТУ, 2021)FEA of a load-bearing system for well-known Asinelli’s tower is provided. Threelayer model “outer brick – filling – inner brick” is developed for historic tower walls. Frictional contact pair is created between the tower itself and the basement. Static simulation of gravity and hurricane loading is fulfilled. Stress state harmonization between outer and inner brick shells is ...2022-03-03 -
МКЭ-испытания L-башни для создания несущей системы аддитивно-субтрактивного станка
Довнар, С. С.; Яцкевич, О. К.; Лапука, А. Д.; Шведова, Д. Н.; Аглушевич, И. Ю. (БНТУ, 2023)Transferring of the medieval L-plan tower in to the machine tool Lcolumn is discussed. Geometrical sample for hybrid (additive-subtractive) machine (ASM) is described. FEA is provided for L-column poured from UHPFRC. High stiffness of spindle units (up to 210 N/μm) is stated. Inner angle of the L-column is recommended for support placement. Ice filling increases Lcolumn’s rigidity ...2024-01-23