Effect of soil particle size on soil-subsoiler interactions using the discrete element method simulations

Wang, Xuezhen; Zhang, Sen; Pan, Hongbo; Zheng, Zhiqi; Huang, Yuxiang; Zhu, Ruixiang

doi:10.1016/j.biosystemseng.2019.04.005

Cited by 86 publications

(39 citation statements)

References 26 publications

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“…The resistance on the suppression device mainly comes from the suppression of the big ridges and small ridge furrows [7,22] . Figure 8 shows the variation curves of the horizontal traction resistance on the suppression device, and the component force of the resistance on the device in the forward direction was traction resistance.…”

Section: Horizontal Traction Resistancementioning

confidence: 99%

Numerical simulation and analysis of mechanized suppression process of seedbed with whole plastic film mulching on double ridges

Dai

Song

Zhao

et al. 2021

International Journal of Agricultural and Biological Engineering

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In order to achieve the construction standard of high mechanized performance of the seedbed with whole plastic-film mulching on double ridges, in this study, the forms of suppression failure were analyzed, and the key factors influencing the suppression performance were determined based on the structure of the seedbed suppression device and its working principles. The discrete element method was adopted for numerical simulation on the suppression process of the seedbed with whole plastic film mulching on double ridges; the parameters during the interaction between the suppression device and seedbed soil were extracted and analyzed, such as contact area, sinkage and horizontal traction resistance trend of press wheels on big ridges and furrows of small ridge. Taking the suppression load on big ridges, suppression load on furrows of small ridge, and advancing velocity of the combined operation machine as the independent variables, qualified rate of suppression as the response value, a mathematical model between the test factors and qualified rate of suppression was established, to explore the influence sequence of the factors on suppression qualified rate. The optimal working parameters of the suppression device were finally obtained: the suppression load on big ridges was 40 N, suppression load on furrows of small ridge was 69.8 N and the machine advancing velocity was 0.98 m/s, and the achieved mean value of suppression qualified rate was 92.6%. Field verification test showed that the mean value of suppression qualified rate was 90.3%, a mere difference of 2.3% compared with the simulation result. The actual operation of the sample machine was basically consistent with the simulation process and could reveal the mechanized suppression operation mechanism of the seedbed with whole plastic film mulching on double ridges, indicating that the established DEM model and its parameter setting were relatively accurate and reasonable.

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Section: Horizontal Traction Resistancementioning

confidence: 99%

Numerical simulation and analysis of mechanized suppression process of seedbed with whole plastic film mulching on double ridges

Dai

Song

Zhao

et al. 2021

International Journal of Agricultural and Biological Engineering

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“…Outlier samples were excluded from the analysis, resulting in only 116 soil sample measurements for data analysis and discussion. Using the soil-particle size classification guideline proposed by Wang et al [23] and Ma et al [24], we classified soil particles into clay (<4 µm), silt (4-63 µm), and sand (>63 µm) and further classified silt particles into fine silt (4-16 µm) and coarse silt (16-63 µm). Other character parameters of the soil samples (medium particle diameter, Md; standard deviation, σ I ; skewness, Sk; and kurtosis, Kg) were calculated and diagramed using Folk and Wood's formulas [18].…”

Section: Sampling and Sample Analysismentioning

confidence: 99%

Distributions of Particle Sizes in Black Soil and Their Environmental Significance in Northeast China

et al. 2021

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In recent years, black soil has decreased and degenerated heavily due to complicated functions of natural and artificial factors. Hence, characterizing distributions of particle sizes in black soil and their environmental influencing factors is important for understanding black soil degradation. A total of 116 surface soil samples in the top 20 cm from a typical black soil region in northeastern China were collected, and the spatial distribution of particle size parameters were characterized. Particle size-sensitive components were extracted quantitatively using the log-normal distribution function, and their environmental implications were investigated. The contents of black soil mechanical composition ranged from 7.8% to 79.3% for clay, 17.7% to 80.3% for silt, and 0% to 73.7% for sand, respectively. Median particle size ranged from 1.71 to 142.67 μm, with a coefficient of variation of 60%, indicating silt accounted for the majority of the composition. Four environmentally sensitive components were identified, including long-distance transported airborne deposits of clay dust (C1), successions from local parent materials (C2), short-distance deposits of silt particles (C3), and a component strongly disturbed by human activities (C4). C1 and C2 had relatively low variations, with C1 exhibiting the smallest variation, and C2 contributing highest proportion, showing no significant differences across all samples. C3 widely existed across samples, suggesting common wind erosion within the black soil region. C3 and C4 varied spatially, which was caused by the low vegetation coverage and high human disturbance of agricultural topsoil. The results suggest that windbreaks should be encouraged to reduce wind erosion in the black soil regions.

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“…The software Solidworks was used to create the geometric simulation model of the ridge forming device and import it into the EDEM software. The numerical simulation process of mechanized ridge forming is shown in Figure 6, the simulation time step is 1.23×10 −5 s, and the total simulation time is 2.40 s [18,19] .…”

Section: Numerical Simulation Of Mechanized Ridge Forming Processmentioning

confidence: 99%

Mechanism analysis and performance improvement of mechanized ridge forming of whole plastic film mulched double ridges

Dai

Song

Zhao

et al. 2020

International Journal of Agricultural and Biological Engineering

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In order to achieve high-performance and mechanization construction standard of whole plastic mulched double ridge seedbed, and to meet its forming process and corresponding agronomic requirements of the mechanized double ridge seedbed, the key working parameters such as the speed of rotary blade group, the thickness of upturned sod and the power consumption of rotary blade group under different parameters were analyzed based on related working performance in ridge forming. Also, the test factors and their range of values were finally determined in this study. Discrete element method (DEM) simulation was applied in the numerical simulation of the mechanized ridge forming process of whole plastic mulched double ridges, and the ridge forming effect and digging resistance variation characteristics of different types of shovels were compared. Taking the forward speed of the combined machine, the penetration angle of the arc-shaped shovel and the depth of rotary tillage as independent variables, and the qualified rate of seedbed tillage as the response value, the mathematical model between the test factors and the qualified rate of the seedbed tillage was established, to explore the influence sequence of the factors on the qualified rate of seedbed tillage, and obtained the following optimal working parameters of the ridge forming device: the advancing velocity of the combined machine of 0.50 m/s, penetration angle of the arc-shaped shovel of 31°, rotary tillage depth of 140 mm, and average qualified rate 95.20% of seedbed tillage in corresponding simulation verification test. Field test showed that the average qualified rate of seedbed tillage in ridge forming device was 93.60%, which was close to that of the simulation results. The actual working condition of the sample machine was basically in line with the simulation process and could relatively precisely reflect the mechanized ridge forming mechanism of whole plastic double ridges. The results showed that the established DEM model and its parameter setting were relatively accurate and reasonable.

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Effect of soil particle size on soil-subsoiler interactions using the discrete element method simulations

Cited by 86 publications

References 26 publications

Numerical simulation and analysis of mechanized suppression process of seedbed with whole plastic film mulching on double ridges

Numerical simulation and analysis of mechanized suppression process of seedbed with whole plastic film mulching on double ridges

Distributions of Particle Sizes in Black Soil and Their Environmental Significance in Northeast China

Mechanism analysis and performance improvement of mechanized ridge forming of whole plastic film mulched double ridges

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