Simulation of Track-Soft Soil Interactions Using a Discrete Element Method

Wu, Jiaxiong; Shen, Yanhua; Yang, Shudi; Feng, Zhipeng

doi:10.3390/app12052524

Cited by 4 publications

(1 citation statement)

References 27 publications

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“…During the test, the throwing of soil was quantified by the throwing distance, the lateral and forward accumulation of soil was measured by the stacking height and stacking angle (Figure 23 [86]. Saunders C. conducted experiments on the openers under the conditions of different forward speeds and rake angles.…”

Section: Soil Accumulation and Throwingmentioning

confidence: 99%

Review of the Research on Soil Disturbance by Tools

et al. 2022

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The discrete element method can be used to analyze the interaction between tools and soil. It can be used to guide the optimal design of tools, but the appropriate simulation and test method selected is important to achieve the goal. This paper mainly introduces the disturbance of soil by tillage tools. The disturbance of the soil by tools include soil loosening, soil movement, and soil mixing. The disturbance contour is used to visually display the disturbance results, and the cross-sectional area, lateral soil throwing amount, ditch ridge height, ditch width, and ditch backfill are used to characterize the cross-sectional shape. Tracers are usually used to track soil particles to visually display the particle movement path during disturbance; this can be used to study the soil disturbance trend by the tools. When parameters and models are appropriate, the movement and contact of microscopic soil particles can be accurately simulated. By comparing the particle behavior of simulation and experiment, the contact model and contact parameters can be verified. The method introduced provides a reference for the optimal design of the tools and the research of disturbance by the tools.

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Section: Soil Accumulation and Throwingmentioning

confidence: 99%

Review of the Research on Soil Disturbance by Tools

et al. 2022

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Anti-skid durability of porous drainage asphalt mixture based on discrete element

Lin

Liu

2023

Proceedings of the Institution of Civil Engineers - Smart Infra

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Since late 20th century, China’s expressway construction has developed rapidly, and the mileage of expressways has become the world's first. However, the safety indicators of expressways, including skid-resistance and durability, decline with time. Public roads that have been in use for an extended period possess a higher level of danger to some extent. In order to improve the safety indicators such as skid-resistance and durability of the road, the discrete element method (DEM) is used to study the proportion of the asphalt mixture, and the spatial structure of the coarse aggregates and asphalt mortar are compared and analyzed. Relevant models are established to compare their pendulum values and structure-depth attenuation. The simulation results show that when the mixture ratio changes, the pendulum value also changes accordingly. When limestone replaces the fine aggregate in the andesite, its pendulum value is increased by 1.5%. When the fine aggregate is limestone and the surface polishing times do not exceed 3500 times, the 7/3S1 asphalt mixture has the best pendulum value. However, as the polishing times continue to increase, the mixture ratio also changes. Compared with the 7/3S1 asphalt mixture, the 8/2S1 asphalt mixture has better effect. When the fine aggregate is replaced by limestone, no matter what form the coarse aggregate is, the pendulum value has been improved to a certain extent comparing with the previous mixture. A2 S2, 5/5S2, 7/3S2 and 8/2S2 blends, compared with A2 A2, 5/5A2, 7/3A2 and 8/2A2 blends, the pendulum value was increased by 1.7 %, 0.5 %, 2.3 %, and 2.1 % respectively. The study shows that in different proportions of coarse aggregates, as the surface texture richness of the blended aggregate increases, the differences between the aggregates also increases, and skid-resistance and durability are also enhanced. The research results provide a blending method to increase the skid resistance and durability of asphalt pavement.

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Simulation of Soil Cutting and Power Consumption Optimization of a Typical Rotary Tillage Soil Blade

Zhang

et al. 2022

Applied Sciences

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The rotary tillage knife roller, as one of the typical soil-touching parts of the tillage equipment cutting process, is in direct contact with the soil. During the cutting process, there are problems related to structural bending, deformation, and high power consumption, caused by impact and load, and it is difficult to observe the micro-change law of the rotary tillage tool and soil. In view of the above problems, we took the soil of the cotton experimental field in Shihezi, Xinjiang, and the soil-contacting parts of the rotary tillage equipment, specifically the rotary tiller roller, as the research subject. Using the finite-element method (FEM) to simulate the structure of the rotary tiller with different bending angle parameters, we obtained its average stress and deformation position information, and obtained a range linear relationship between the bending angle and the structural performance of the rotary tiller tool. Using discrete element method (DEM)-based simulation to build the corresponding contact model, soil particle model, and soil–rotary tillage knife roll interaction model to simulate the dynamic process of a rotary tillage knife roll cutting soil, we obtained the change rules of the soil deformation area, cutting process energy, cutting resistance, and soil particle movement. By using the orthogonal simulation test and the response surface method, we optimized the kinematic parameters of the rotary tiller roller and the key design parameters of a single rotary tiller. Taking the reduction of cutting power consumption as the optimization goal and considering the influence of the bending angle on its structural performance, the optimal parameter combination was obtained as follows: the forward speed was 900 m/h, the rotation speed was 100 rad/min, the bending angle was 115°, and the minimum power consumption of the cutter roller was 0.181 kW. The corresponding average stress and deformation were 0.983 mm and 41.826 MPa, which were 15.8%, 13%, and 7.9% lower than the simulation results of power consumption, stress, and deformation under the initial parameter setting, respectively. Finally, the effectiveness of the simulation optimization model in reducing power consumption and the accuracy of the soil-cutting simulation were verified by a rotary tilling inter-field test, which provided theoretical reference and technical support for the design and optimization of other typical soil-touching parts of tillage and related equipment, such as disc harrow, ploughshare, and sub-soiling shovel.

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Simulation of Track-Soft Soil Interactions Using a Discrete Element Method

Cited by 4 publications

References 27 publications

Review of the Research on Soil Disturbance by Tools

Review of the Research on Soil Disturbance by Tools

Anti-skid durability of porous drainage asphalt mixture based on discrete element

Simulation of Soil Cutting and Power Consumption Optimization of a Typical Rotary Tillage Soil Blade

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