Abstract
The article is focused on the importance of studying Russia’s forestry roads. Providing the vehicles movability along forestry roads is necessary for combatting forest fires. Thus, for adequate selection of vehicles parameters it is necessary to know and model the forestry roads surface. Field experiments to measure diameters of fallen branches, trees and rootstocks on forestry roads and their interposition have been carried out, their snapshots are shown. Diagrams with experimental and theoretical values are given. The flow-chart of methods modelling discreet uneven surfaces distribution (fallen branches, trees and rootstocks) and their interposition on forestry roads is given. Using these data it is possible to forecast and calculate the area passability under the condition of profile passability; to calculate vibration loading modes when moving over this type of roads and loading of power trains.
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