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Actual directions of scientific researches of the XXI century: theory and practice
UDC 63

RESEARCH OF DYNAMIC STABILITY OF THE MACHINE-TRACTOR UNIT ON THE VIRTUAL STAND

Published in Actual directions of scientific researches of the XXI century: theory and practice · Volume 8, Issue 1 · Pages 85–91 · Rubric: MODERN FORESTRY TECHNOLOGIES AND FOREST EXPLOITATION
DOI: https://doi.org/10.34220/2308-8877-2020-8-1-85-91
Received: 18.03.2020 Accepted: 24.03.2024
Authors
MI
Mikhail N. Lysych
ABSTRACT
The questions of studying the dynamic stability of machine-tractor unit by the methods of multi-body dynamics (MBD) are considered. The study used a virtual stand created in CAD SolidWorks and CAE application SolidWorks Motion. It simulated the movement of the machine-tractor unit on the basis of the MTZ-82.1 tractor equipped with mounted modular implements. The motion surface has four different types of obstacles located in series in separate sections. To analyze the stages of the machine-tractor unit movement, we used the parameter of the lift height of the geometric center of each of the wheels above the supporting surface and the fact of the unit rollover. He showed that overcoming a single linear, single sequential and group linear obstacles at a speed of 3.22 m/s occurs without loss of stability. Only when overcoming a group sequential obstacle, significant fluctuations in the tractor frame are observed, however, due to the balancing suspension of the front wheels, they do not always lead to the rollover of the unit. In the future, using the developed virtual stand, it is possible to conduct studies of the dynamic stability of various configurations of the machine-tractor unit. In addition to the MTZ 82.1 tractor, models of other tractors can be used. It is also possible to change the geometry of obstacles, the angles of inclination of the supporting surface, speed mode, contact parameters, etc.
KEYWORDS
machine-tractor unit, 3D-CAD, CAE, multi-body dynamics, obstacles, virtual experiment, analysis
Text References
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ВВЕДЕНИЕ

Проблеме обеспечения устойчивости автомобильного транспорта и различных машинно-тракторных агрегатов посвящено множество работ, однако до сих пор она остается актуальной и однозначно не решена. Наиболее известным и распространенным методом исследования устойчивости является метод натурных испытаний, однако он является самым материально затратным и продолжительным по времени, так как требует наличия натурного образца. Альтернативой натурным испытаниям выступают расчетные исследования, базирующиеся на компьютерном моделировании [2-11]. Современные компьютерные технологии многотельного моделирования (Multibody Dynamics, MBD) позволяют учитывать множество факторов, например, распределение масс, моментов инерции элементов в пространственной модели, кинематику подвижных частей, наличие упругих элементов и т.д. [4].

 

ЦЕЛЬ ИССЛЕДОВАНИЯ

Целью исследования является изучение динамической устойчивости МТА при его движении по поверхности с различными типами препятствий с применением виртуального стенда.

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