Research of soil compaction process in area of contact with a wheel mover

Abstract

Practice of operating heavy wheeled machines (T-150K, K-700, K-701) and experimental data show that even if the average pressure of a wheel on soil is maintained, degree of its compaction increases. To explain this phenomenon, in our opinion, it is necessary to develop a mathematical model of interaction process of a deformable pneumatic with an elastic-plastic medium, which is considered to be soil subject to modern processing. Working parts of agricultural machines process a wide variety of materials, number of which is increasing, in addition, method of processing the same material is often changed in an effort to improve agricultural technology. This forces us to create new mechanisms for agriculture that were known before. Use of replaceable toothed working parts on flat-cut cultivators helps to reduce energy consumption and improve quality of non-moldboard soil cultivation. Article proposes a method for mathematical description of distribution of machine load over contact surface of a wheeled mover with deformable soil. At the same time, several assumptions and conditions were adopted, namely: volume of skeletal part of deformable soil element remains constant, independent of deformation; contact surface is a curve of two radii - in the load zone (Rl) and in the unloading zone (Ru), tire operating in driven mode has no skids; deformable soil is uniform in depth; wheel load is constant; tire radial stiffness along tread portion width is also constant in magnitude and direction; lateral pressure along deformable soil depth is small and is not taken into account in calculation.

Influence of Agrotechnical Practices and Sowing Time in Various Weather on Soybean Yield

“…Pre-sowing rolling is carried out to retain moisture in the soil, crush large clods of earth and partially level the field surface. Rolling the soil before sowing breaks up large clods of earth and compacts too loose soil (Kokieva et al, 2021). This operation reduces the slippage of the seeder support wheels, which increases the uniformity of sowing and stabilizes the depth of seed placement (Jia et al, 2016;Liu et al, 2022).…”

Kinematic and force patterns of interaction of a link caterpillar of a transport machine with the ground

“…We connect the local coordinate system x0y with the axis of the track roller. The distributed load q(x) from the side of the track roller to adjacent tracks has a parabolic law [42]    …”

Measurement and Analysis of the Influence Factors of Tractor Tire Contact Area Based on a Multiple Linear Regression Equation

“…Of the model parameters, inflation pressure had the greatest influence on vertical stress, followed by tire load and speed. And the prediction equation can be used to preliminary estimate the soil compaction, which directly affects the sustainability of agriculture [2,8].…”

“…The portion of the tire in contact with the supporting surface is called "contact area", and it transmits the forces developed between the tire and the ground [1]. Field driving and field tilling with heavy machines contribute to soil compaction and soil shearing and reduce the availability of oxygen, water, nutrients, and heat to the soil [2,3]. This affects the environment and the sustainable development of agriculture by increasing N 2 O, CH 4 , and CO 2 emanation from faded soils, such as accelerating global climate warming and guaranteeing food security [4,5].…”