Modeling the Process of Adhesion of the Propeller to the Soil Taking into Account the Pitch of the Grousers
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2024, Vol 6, Issue 6
Abstract
The operational and protective forests of the Russian Federation are characterized by a very wide variety of natural and industrial conditions, including relief and soil ones. The efficiency of forestry machines in various natural and industrial conditions largely depends on their cross-country ability, which is one of the most important performance indicators. A significant amount of theoretical and experimental research by Russian and foreign scientists has been devoted to forecasting the flotation of forestry machines under various operating conditions. An analysis of the work of the predecessors suggests that the known forecast models either do not take into account such an important indicator of forestry machine propellers as the pitch of the grousers, or do not reveal its influence on the propeller adherence to the soil. This work is devoted to the theoretical solution of this issue. Clarifications have been proposed to the estimation of the coefficient of adhesion of the forestry machine propeller to the soil. The mechanism of attenuation of tangential stresses caused by the action of the forestry machine propeller has been described, where attenuation has been described by nonlinear dependencies. An estimate of the coefficient of adhesion obtained with and without taking into account the attenuation of shear deformations along the contact patch has been considered. Calculations have shown that both of these options for numerical estimation of the coefficient of adhesion are consistent and their relative differences are small. An important detail is that as the pitch of the grousers increases, the adhesion estimates without taking into account damping increase monotonically. Thus, for the pitch of the grousers there would be a contradictory recommendation about its maximum possible increase. The results obtained using the proposed formulas, taking into account the attenuation of shear deformations in the soil, make it possible to identify the ranges of pitch variation in which the maximum calculated values of adhesion are noted. For example, with a slip coefficient of 0.05, the maximum is observed at a pitch within 0.15–0.25 m. Thus, the introduction of an expression into the mathematical model that takes into account attenuation makes it possible to reveal a qualitatively different nature of the adhesion function from the pitch of the grousers and mark the optimal range of its values.
Authors and Affiliations
Egor G. Khitrov, Ilya S. Dolzhikov, Olga A. Kunitskaya, Varvara P. Druzyanova, Daniil V. Bolotin, Aleksandr V. Andronov
Keywords
Related Articles
- EP ID EP753528
- DOI 10.37482/0536-1036-2024-6-147-159
- Views 35
- Downloads 1
Forest Sustainability of Ecotopes of the Volga-Akhtuba Floodplain when Cultivating Pine Plantations
In the south of European Russia, the largest sand massifs are found in the zone of dry steppes and semi-deserts. Effective utilization of such lands requires creation of protective forest planting of drought-resistant co...
Improving the Technology of Reforestation in Cuttings with the Use of Energy-Efficient Tractors
Currently applied partial reforestation in cuttings and removal of stumps by uprooting have a number of significant technological, environmental and economic disadvantages. These are removal of the humus layer of soil ou...
Dimension and Quality Specifications of Round Logs Harvested with the Use of Multi-Operational Forest Machines
It is necessary to carry out a statistical assessment of the harvested wood parameters in order to increase the yield of round timber and the overall productivity of logging operations while operating multi-operational f...
The Use of Oxidative Alkali Treatment for Sulphate Hardwood Pulp Bleaching
Pulp and paper plants use chlorine dioxide, oxygen, and hydrogen peroxide for pulp bleaching. The paper aims at analyzing the effect of oxidative alkali treatment with the addition of oxygen and hydrogen peroxide on hard...
Formation of the Secondary Area of Caragana аrborescens Lam. in the Forest Parks of Yekaterinburg
The article is devoted to the analysis of the distribution and features of the ecological and biological confinement of Caragana arborescens Lam. in the forest parks of Yekaterinburg. Caragana plantations have been studi...