Results of the simulation of tracked vehicles ride considering the interaction with a deformable road

Abstract

BACKGROUND: Tracked vehicles motion on a deformable road, which can be, for instance, cross-country terrain or field of various agricultural plants, is defined with various indicators. Depending on environment conditions, road surface properties etc., some of these indicators are chosen as main criteria of vehicles operational and technical performance assessment. Search of optimal parameters and operation modes of tracked vehicles demands using numerical modelling of considered processes.
 AIMS: Using imitational modelling, to obtain visual representation of influence of path unevenness, path microprofile, tracked vehicle velocity, its layout, nature of relation between particular unit assemblies, systems and their properties, physical and mechanical road properties regarding rheological approach to determination of them, state parameters of road material on change of tracked vehicles ride comfort indicators.
 METHODS: Results of simulation of ride comfort indicators for various tracked vehicles, obtained with the known earlier mathematical model, which considers design and technological properties of them as well as road surface state parameters, presented as physical and mechanical properties, based on a well-known rheological approach, are presented in the article. Agricultural tractors of different mass and the S-300 anti-aircraft missile systems, based on the 832M tracked chassis, are considered as tracked vehicles.
 RESULTS: Analysis of obtained relations, based on use of imitational modelling, revealed a set of patterns of tracked vehicles ride comfort indicators changing. It is defined that consideration of rheological characteristics and state parameters of a soil layer helps to improve simulation accuracy significantly. The obtained data shows the influence of velocity, mass and base length of tracked vehicles, offset of pressure center of caterpillar mover and other design parameters on growth of vertical and longitudinal-angular oscillations.
 CONCLUSIONS: The conducted study contributes to optimal development of tracked vehicles and assembling of different machine-tractor units, performing demanded technological operations in different conditions with specific road surface state parameters.

Power distribution mechanisms with friction control in the transmission of a road train with an active trailer-dissolution

“…However, when the brake T 1 is turned on, a mechanism built on the scheme of a symmetrical cylindrical differential additionally operates in the kinematic chain of the rear axle drive. The kinematic and force analysis of the operation of the mechanism, performed according to traditional methods [21,22,23] will show that the distribution of angular velocities and torques between the driving axles in this case will be symmetrical.…”

“…Since the external parameters of the controlled PDM do not depend on its structure, it is possible to offer various options for the kinematic schemes of mechanisms with desired properties. The synthesis of the kinematic scheme of a planetary controlled PDM with two degrees of freedom is based on recommendations from the sources [21,22,23]. In addition to using simple planetary mechanisms, in some cases it is possible to use a complex four-link mechanism.…”

“…On lighter chassis, an electromechanical drive based on a tear mechanism can be used. The design and calculation method of the tear mechanism are described, for example, in the book [21]. An electric stepper motor can be used as an actuator.…”

Нормативно-Правовая Основа Стратегической Доктрины Казахстанского Машиностроения В Целях Обеспечения Развития Транспортных И Агротехнических Заводов

“…Было бы целесообразным разработать и принять правительственные Постановления Республики Казахстан: «О дальнейших мерах по развитию отрасли сельскохозяйственного машиностроения в Республике Казахстан», «Об углублении и расширении казахстанской локализации в сфере машиностроительного производства», в том числе на заводах по производству сельскохозяйственного оборудования и машин. Для этого необходимо, чтобы казахстанские специалисты (изобретатели, конструкторы, правоведы) досконально изучили производство тех или иных компонентов машин зарубежных концернов и заводов, технологически и юридически оформляли границы оригинала компонента и казахстанского локализируемого новшества [17]. На уровне казахстанского Правительства необходимо принятие Постановления «О подготовке высокопрофессиональных кадров для предприятий по выпуску разнообразных машин и оборудования аграрно-технического профиля».…”

Estimated assessment of the power and geometric parameters of the caterpillar mover

“…The development and modernization of the undercarriage are implemented due to extensive theoretical and experimental research: clarification of the interaction of the propulsor with the supporting surface, the choice of optimal modes of operation of the undercarriage, the improvement of calculation and design methods, the use of new technological and design methods [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”