Abstract
The article presents the results of experimental studies of the micro landform of the cutting area surface as a source of perturbing continuous oscillations of the sprung and unsprung masses of the logging machine. The substantiation of the expediency of studying the microprofile of forest support surfaces in the framework of this work is presented. The characteristic of the objects of the experimental study of the micro landform is given. A new measuring complex and the procedure for measuring geometric parameters of irregularities and slopes of the forest support surface of vehicles were proposed. The justification of the number of measurements in the planning of the experiment is given. As a result of data processing after approximation, normalized correlation functions and their approximation coefficients for the studied types of forest growing conditions were obtained. The obtained curves of normalized correlation functions have a decreasing character, which indicates the presence of a strong correlation on a small section of the length and differ in the steepness of the decline and the distance of the correlation, which varies from 1.8 to 11.6 m for different sections. The obtained approximation coefficients quantitatively characterize the perturbing effect of the irregularities of the natural surfaces of cutting areas of various types of forest growing conditions on the movement of logging machines.
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