Yakutsk, Yakutsk, Russian Federation
Yakutsk, Yakutsk, Russian Federation
It is known that the vertical load on the skidder including depends on the size characteristics hauling felled trees. In this case vertical load on the tractor is equal to the weight having caved in portion trees portion by the lower part of the tree cuta-way to the point of lifted from the ground surface and bending moment. For a determination of the weight the immersed por-tion is accounted distribution of mass along the length of felled trees wood density, modulus of elasticity and the friction force in felled trees the bundle. To simplify the calculation was performed at the following assumptions: a generator trunks accept how to defining body of revolution (truncated cone); wood density is uniform over the volume of that part of felled trees which is seen currently.
modulus of elasticity, deflection, felled trees, optimization
1. Komarov M.S. Dinamika mekhanizmov i mashin [Dynamics of machines and mechanisms]. Moscow, 1969, 295 p. (In Russian).
2. Lozovoy V.A., VerkhovYu. I. Issledovanie dinamicheskikh kharakteristik khlystov i derev'ev [Research of dynamic characteristics of stems and trees] Nadezhnost' i dolgovechnost' stroitel'nykh mashin [Reliability and durability of construction machines]. Krasnoyarsk, 1975, no. 2, 89 p. (In Russian).
3. Lozovoy V.A. K opredeleniyu zhestkosti odinochnykh krupnomernykh khlystov [For the definition of the stiffness of single of large size felled trees]. Krasnoyarsk, 1977, 11 p. (In Russian).
4. Lozovoy V.A. Osobennosti rascheta sobstvennykh chastot kolebaniy odinochnykh krupnomernykh khlystov [Peculiarities of calculating the natural frequencies of oscillations of single of large size felled trees]. Krasnoyarsk, 1977, 10 p. (In Russian).
5. Lozovoy V.A. Raschety lesozagotovitel'nogo oborudovaniya s uchetom kolebaniy [Calculations of forestry equipment considering oscillations]. Krasnoyarsk, 1999, 135 p. (In Russian).
6. Lozovoy V.A. Teoreticheskie i eksperimental'nye issledovaniya vzaimodeystviya khlystov s lesnymi mashinami avtoref. kand. tehn. nauk [Theoretical and experimental studies of the interaction felled trees with forest machines. Phd. in Engineering. diss.]. Moscow, 1982, 18 p. (In Russian).
7. Teregulov I.G. Soprotivlenie materialov i osnovy teorii uprugosti i plastichnosti [Resistance of materials and the basic theory of elasticity and plasticity]. Moscow, 1984, 472 p. (In Russian).
8. Ushnitskiy A.A. Obosnovanie parametrov malogabaritnoy tyagovo-transportnoy mashiny dlya rubok promezhutochnogo pol'zovaniya disser. kand. tehn. nauk [Justification of parameters of small-sized trailer transport machine for intermediate felling. Dr. technical. sci. diss.]. Krasnoyarsk, 2006, 172 p. (In Russian).
9. Feodosev V.I. Soprotivlenie materialov [Resistance of materials]. Moscow, 1986, 512 p. (In Russian).
10. Bergstrom D., Fulvio F.D., Nuutinen Y. Effect of Forest Structure on Operational Efficiency of a Bundle-Harvester System in Early Thinnings. Croatian Journal of Forest Engineering, 2015, Vol. 37, no. 1, pp. 37-49.
11. Labelle E.R., Jaeger D. Quanting the Use of Brush Mats in Reducing Forwarder Peak Loads and Surface Contact Pressures. Croatian Journal of Forest Engineering, 2012, Vol. 33, no. 2, pp. 249-274.
12. Labelle E.R., Jaeger D., Poltorak B.J. Assessing the Ability of Hardwood and Softwood Brush Mats to Distribute Applied Loads. Croatian Journal of Forest Engineering, 2015, Vol. 36, no. 2, pp. 227-242.
