Influence of the thickness and length of a log on the dependence of the volume yield of sawn work on the number of their thickness in the set
https://doi.org/10.53374/1993-0135-2023-3-252-256
Abstract
This work is devoted to the continuation of the research of the authors to establish patterns of influence of the number of thicknesses of boards in the set on their volume output. The results of these studies are presented in this journal in the article “Dependence of the volumetric yield of lumber on the number of their thicknesses in the set”. To refine the revealed implicit dependencies, the values of the decrease in the volumetric yield of sawn timber in optimal sets for various diameters and lengths of logs were determined. It has been established that when sawing, for example, logs with a diameter of 22 cm and a length of 3.0 m, the tightening of restrictions from “no more than 4 thicknesses in the set” to “no more than 3” when optimizing the set leads to a decrease in volume output by 1.43 %. Further tightening to “no more than 2 thicknesses” leads to a decrease in volumetric yield by 1.37 %. The analysis of the obtained results shows that the change in the volumetric yield of sawn timber with a change in the diameter and length of the logs is oscillatory due to the continuity of the log dimensions and the discreteness of the dime nsions of “lumber fit into the log”. To reduce the interfering effect of fluctuations in determining the influence of the diameter and length of a log on the magnitude of the decrease in the volumetric yield of lumber due to the small thickness of the posts, we expanded the ranges of compared diameters and lengths of logs and switched to average values. It was found that the average decrease in volume output for optimal sets and diameters of 14 and 30 cm is 0.82 and 1.56 %, respectively, and for log lengths of 3.0 and 6.5 m – 1.57 and 0.83 %. For deliveries close to optimal, the reduction is 1.3; 1.83 and 2.41; 1.24 %. Thus, tightening the limit on the number of thicknesses of boards in a set leads to a decrease in the volume yield of sawn timber by a value that depends on the diameter and length of the log: the larger the diameter and the shorter the length, the more the volume yield depends on the number of thicknesses of boards in the set.
About the Authors
V. V. Ogurtsov
Reshetnev Siberian State University of Science and Technology
Russian Federation
Russian Federation
31, Krasnoyarskii rabochii prospekt, Krasnoyarsk, 660037
E. V. Kargina
Reshetnev Siberian State University of Science and Technology
Russian Federation
Russian Federation
31, Krasnoyarskii rabochii prospekt, Krasnoyarsk, 660037
I. S. Matveeva
Reshetnev Siberian State University of Science and Technology
Russian Federation
Russian Federation
31, Krasnoyarskii rabochii prospekt, Krasnoyarsk, 660037
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Review
For citations:
Ogurtsov V.V., Kargina E.V., Matveeva I.S. Influence of the thickness and length of a log on the dependence of the volume yield of sawn work on the number of their thickness in the set. Conifers of the boreal area. 2023;41(3):252-256. (In Russ.) https://doi.org/10.53374/1993-0135-2023-3-252-256
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