HYPOTHESIS TESTING ON THE DISTRIBUTION LAW OF TRAVEL TIME OF A TIMBER TRUCK DURING TIMBER TRANSPORTATION

UDC 630*31(043.3)

Korolenia Ruslan Olegovich – Assistant Professor, the Department of Informatics and Web-Design. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: korolenia@belstu.by

Bednaya Yuliya Aleksandrovna – student. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: bednaja3423@gmail.com

DOI: https://doi.org/ 10.52065/2519-402X-2023-270-2-15.

Key words: travel time, log truck, timber transportation, route, normal distribution law, hypothesis.

For citation: Korolenia R. O., Bednaya Yu. A. Hypothesis testing on the distribution law of travel time of a timber truck during timber transportation. Proceedings of BSTU, issue 1, Forestry. Nature management. Processing of Renewable Resources, 2023, no. 2 (270), pp. 126–133. DOI: 10.52065/2519-402X-2023-270-2-15 (In Russian).

Abstract

Effective operational management of the harvested timber transportation process is the most important task. When carrying out logging operations, transportation of harvested timber can be carried out in quite complex conditions: different consumers of timber, different routes of timber trucks, within the limits of delivery time constraints, etc. The choice of operational management strategy in such conditions is difficult. One of the problems arising in selecting and making rational decisions is the difficulty of theoretically determining the duration of timber transportation to consumers. In this regard, the study of the time of movement of log trucks is an urgent task. The article specifies the main factors influencing the movement time of log trucks when transporting harvested timber. The main drawbacks of the existing methods, techniques and algorithms of determining movement speeds and time of log carrier movement are considered. The methods of the conducted researches for determining the time of movement of assortment trucks on different timber transportation routes are described. The article describes the method of testing the hypothesis proposed by the authors that the average movement time of log trucks as a random variable is subject to the normal distribution law. The comparison of real values of log trucks operation time with the data obtained as a result of the study is given. The maximum deviation of the calculated indicators of movement time from the actual ones was up to 12%.

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References

  1. Harvesting and processing timber resources. Available at: https://www.mlh.by/our-mainactivites/forest/zagotovka-i-ispolzovanie-drevesnykh-lesnykh-resursov/ (accessed 01.02.2023) (In Russian).
  2. Nefedov A. F., Vysochkin L. N. Planirovaniye eksperimenta i modelirovaniye pri issledovanii ekspluatatsionnykh svoystv avtomobiley [Experimental planning and modelling in the study of vehicle performance]. L’vov, Vishcha shkola Publ., 1976. 160 p. (In Russian).
  3. Shegelman I. R., Skrypnik V. I., Kuznetsov A. V., Pladov A. V. Vyvozka lesa avtopoyezdami. Tekhnika. Tekhnologiya. Organizatsiya [Timber hauling by road-train. Technique. Technology. Organisation]. St. Petersburg, PROFIKS Publ., 2008. 304 p. (In Russian).
  4. Pladov A. V. Sovershenstvovaniye metodov obosnovaniya ratsional’nykh ekspluatatsionnykh parametrov lesovoznykh avtopoyezdov. Avtoreferat dissertatsii kandidata tekhnicheskikh nauk [Improving the justification methods for rational operational parameters of timber trucks. Abctract of thesis PhD (Engineering)]. Petrozavodsk, 2007. 20 p. (In Russian).
  5. Korolenia R. O. The results of research on the temporal characteristics of the movement of log trucks. Trudy BGTU [Proceedings of BSTU], series II, Forest and Woodworking Industry, 2009, issue XVII, pp. 67–70 (In Russian).
  6. Naskovets M. T., Korolenia R. O. Classification of assortment transport routes using XYZ analysis. Trudy BGTU [Proceedings of BSTU], series II, Forest and Woodworking Industry, 2010, issue XVIII, pp. 71–75 (In Russian).
  7. Alyab’ev V. I. Optimizatsiya proizvodstvennykh protsessov na lesozagotovkakh [Optimization of production processes in logging]. Moscow, Lesnaya promyshlennost’ Publ., 1977. 232 p. (In Russian).
  8. Korolenia R. O. Classification of timber transportation routes and determination of the duration of movement of log trucks on them in the conditions of forestry institutions of the Republic of Belarus. Tekhnologiya i oborudovaniye lesopromyshlennogo kompleksa: sbornik nauchnykh trudov SPbGLTU [Technology and equipment for the timber industry: a collection of scientific papers from St. Petersburg State Forestry University], 2013, issue 6, pp. 109–116 (In Russian).
  9. Mokhirev A. P., Rukomoynikov K. P., Mazurkin P. M. Ranking of experiments in multivariate analysis of timber removals from forest plots. Uspekhi sovremennogo yestestvoznaniya [Advances in modern natural science], 2021, no. 2, pp. 26–33. DOI: 10.17513/use.37570 (In Russian).
  10. Korolenia R. O. Results of statistical processing of log truck operating times for timber hauling. Lesnaya inzheneriya, materialovedeniye i dizayn: materialy 85-y nauchno-tekhnicheskoy konferentsii professorsko-prepodavatel’skogo sostava, nauchnykh sotrudnikov i aspirantov (s mezhdunarodnym uchastiyem) [Forest Engineering, Material Science and Design: proceedings of the 85th scientific and technical conference of academic staff, researchers and PhD students (with international participation]. Minsk, 2021, pp. 97–99 (In Russian).
  11. Skrypnikov A. V., Kondrashova E. V., Skvortsova T. V., Dorokhin S. V. Influence of traffic conditions on traffic speeds in timber hauling. Sovremennyye naukoyemkiye tekhnologii [Modern knowledgeintensive technologies], 2014, no. 4, p. 153 (In Russian).
  12. Makeev V. N., Dymova N. N., Dolmatov D. V. Determining the technical speed of timber trucks. Lesotekhnicheskiy zhurnal [Forestry Journal], 2011, no. 3 (3), pp. 81–83 (In Russian).
  13. Otraslevyye respublikanskiye normy vyrabotki i rastsenki na raboty v lesnom khozyaystve. Sbornik 3. Vyvozka drevesiny na rubkakh ukhoda za lesom i rubkakh glavnogo pol’zovaniya. Kniga 2. Vyvozka drevesiny na rubkakh glavnogo pol’zovaniya [Branch republican norms of production and rates for works in forestry. Collection 3. Timber extraction on thinning and final felling. Book 2. Removal of wood on thinning operations]. Minsk, Belgiproles Publ., 2002. 268 p. (In Russian).
  14. Alyab’ev V. I., Grekhov G. F., Il’in B. A., Kuvaldin B. I. Sukhoputnyy transport lesa [Forest land transport]. Moscow, Lesnaya promyshlennost’ Publ., 1990. 413 p. (In Russian).

20.03.2023