Original scientific paper
https://doi.org/10.5552/crojfe.2019.567
Simulation Modeling of Truck Load of Skidding Tractors with a Grapple for Chokerless Skidding
Ilya R. Shegelman
Pavel V. Budnik
Vyacheslav N. Baklagin
Abstract
The objective of the present study is to define mass distribution laws for a bundle of trees using the methods of statistical simulation modeling in order to calculate chokerless skidding tractors lift capacity. For that purpose a statistical simulation model has been developed to generate forest taxation data necessary for complete filling of skidding tractor grapple. The following samples have been obtained from the regions of the European North of Russia based on the model: masses of bundles of trees that can be placed in grapple and values of vertical component of normal load applied to skidding tractor grapple. Minimum values for masses of bundles may vary in the range of 40–87% from the average value. Maximum values may vary in the range of 8–55% from the average value. The difference between the maximum and minimum masses of bundle values increased with increasing the capacity grapple and decreased with increasing the distance from the butt to grapple. We have determined the dependence of bundle mass variation and values of vertical component of normal load applied to skidding tractor grapple on capacity grapple for the regions of the European North of Russia. The studies have allowed determining recommended values for chokerless skidding tractors lift capacity. The analysis of specifications of various models of skidding tractors has shown that clambunk skidders have deficient marginal lift capacity.
Keywords
bundle of trees; skidding; simulation study; statistical modeling; lift capacity
Hrčak ID:
228244
URI
Publication date:
1.8.2019.
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