Mathematical modeling of compacting process of the frozen soil under the influence of forest machines and logging systems

One of the important environmental problems is the damage caused to the environment by the exhaust gases of internal combustion engines. They contain both non-toxic (nitrogen, carbon dioxide) and toxic (carbon monoxide, hydrocarbons, aldehydes, benzapyrene) chemicals that have a negative impact on both humans and nature. In addition to the daily operation of logging equipment, exhaust gases also occur during laboratory tests of internal combustion engines. In order to minimize the amount of exhaust gases during the study and testing of internal combustion engines of forest transport, the article proposes a variant of a digital twin, where by means of several tests of this sample, it will be possible to simulate other possible options, but with its electronic copy.

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Experimental Results of the Temperature Effect of Cryolithozone Soils on Their Physical and Mechanical Properties

Rudov¹,

Shapiro²,

Grigorev³

et al. 2021

Forestry Engineering Journal

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Establishing the regularities of the temperature influence of frozen soils on their physical and mechanical properties makes it possible to make more accurate estimates of the parameters of the interaction process of forest machines and skidding systems with the soil mass when performing logging operations with predetermined static loads. An adequate assessment of the state of the edge part of frozen soil mass is the basis for the formation of initial conditions when calculating the parameters of the destruction of the stress-deformed frozen soil layer, the processes of its compaction and deformation under the influence of static loads arising from the operation of various forest machines and skidding systems. The article presents methodology, hardware and the results of data processing obtained in field experimental studies to determine the effect of frozen soil temperature on its strength and deformation properties. To reveal the regularities of the change in soil temperature in depth, as well as in order to take soil samples for testing the mechanical properties in depth, soil benches with an area of 1×1 m and a depth of up to 1.0 m were opened. Sections were investigated in three areas with a predominance of: permafrost pale brown soils with sandy loam soil base; humus-carbonate soils with a loamy base; cryozem gley soils with a clay base. Soil temperature was measured near the ledge surface with a HI 98501 Hanna soil electronic thermometer (Germany) with a resolution of 0.1°C and an error of ± 0.3°C. The temperature value was measured as the depth increased with the help of a penetrating thermometer probe in the control holes along the depth of the ledge with a step of 0.1 m

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Mathematical modeling of compacting process of the frozen soil under the influence of forest machines and logging systems

Cited by 4 publications

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The Analysis of Research of Wood Processing Wastes Briquetting by Using Hydraulic Press Equipment

The Analysis of Research of Wood Processing Wastes Briquetting by Using Hydraulic Press Equipment

The use of digital twin technology in the testing laboratories of forest machines

Experimental Results of the Temperature Effect of Cryolithozone Soils on Their Physical and Mechanical Properties

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