Analyzing the mixing performance of a rotary spader using digital image processing and discrete element modelling (DEM)

Üçgül, Mustafa; Saunders, Chris; Li, Peilin; Lee, Sang‐Heon; Desbiolles, J.

doi:10.1016/j.compag.2018.05.028

Cited by 53 publications

(17 citation statements)

References 8 publications

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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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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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“…Several studies investigated the effects of rotary blade geometry, operating speed, and cutting-edge geometry on the soil cutting and throwing process, torque and energy requirements, and furrow parameters in strip-tillage [6][7][8]. A full-scale rotary blade was tested in the field to investigate its mixing ability [9]. Soil cutting process was simulated by SPH and the Taguchi method to optimize the rotary blade.…”

Section: Introductionmentioning

confidence: 99%

“…Discrete Element Method (DEM) was a promising method for soil-tool interaction studies and has been used in many tillage applications [16]. The full-scale rotary spader was tested using DEM and in the field, and proved that DEM can be used to model soilrotary spader interaction to analyze different operation conditions [9]. The interaction between the soil and a moldboard plough was modelled by DEM, and the comparison with experimental test and analytical method proved that DEM has the potential to predict soil-moldboard plough interaction with a reasonable accuracy [17].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Performance of a Combined Tillage Implement with Plough and Rotary Tiller by Experiment and DEM Simulation

Heng

Zheng

et al. 2021

Processes

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In order to improve the performance of tillage tool for straw incorporation in silty clay loam, a combined tillage implement with plough and rotary tiller was designed. Its performance on straw incorporation and power consumption was investigated, and the combined tillage types (CTSR and CTDR) were compared with traditional tillage types including a sole plough type (SP and DP), a sole rotary tiller (RT), and a two-pass tillage type (SP+RT and DP+RT) in a rice field experiment. The effect of the forward speed and rotary speed for RT and CTSR were studied by DEM simulation. The ratio of straw coverage by CTSR and CTDR increased nearly 20% compared with RT, and the stability coefficient of tillage depth and CV of the surface evenness after tillage also improved in the field experiment. The total power of CTSR and CTDR was less than that of RT and two-pass tillage types by measurement. DEM simulation indicated that the total power of CTSR increased with the increase of the forward speed and rotary speed, and the reduction of the rotary power for the combined tillage implement can be obtained at a relatively high rotary speed. The combined tillage implement improved the performance on straw incorporation and had an advantage on power consumption at some operational conditions.

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“…Due to its unique advantages, the discrete element method has been used by many researchers to design soil tillage components [15][16][17][18]. Li et al [19] designed a serials of subsoiling tools by mimicking the features of bear claws, and they developed a numerical model to simulate the interaction between the bear claw and soil using DEM. Sun et al [20] used a Hertz-Mindlin (no slip) model in EDEM (Engineering Discrete Element Method; software for bulk material simulation) to simulate and analyze the interactions between the bionic subsoilers which were inspired by the placoid scale rib structure of shark skin and the soil.…”

Section: Introductionmentioning

confidence: 99%

Bionic Design of a Potato Digging Shovel with Drag Reduction Based on the Discrete Element Method (DEM) in Clay Soil

Jiang

et al. 2020

Applied Sciences

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The resistance of ordinary potato digging shovels can increase dramatically when used in a clay soil because of the adhesion between the soil and shovel. In this paper, a new type of bionic potato digging shovel was designed to decrease adhesion. The bionic structural elements, i.e., scalelike units (S-U) were applied to the potato digging shovel with inspiration from pangolin scales. The discrete element method (DEM) considered cohesion was used to simulate the drag reduction performance in clayey soil conditions. An ordinary plane shovel (O-P-S) was used for comparison. Three indicators (total force, draft force and compressive force) were used to characterize the drag reduction performance. The effect of the design variables of the bionic structures (length [l] and height [h]) and the transversal and longitudinal arrangement spacing (S1 and S2) of the structures on the drag reduction performance were analyzed. The results showed that the drag reduction performance of the bionic shovels with suitable parameters was better than that of the O-P-S. The best bionic sample labeled as a bionic prototype had a 22.26% drag reduction rate during the soil bin test and a 14.19% drag reduction rate during the field test compared to the O-P-S.

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Analyzing the mixing performance of a rotary spader using digital image processing and discrete element modelling (DEM)

Cited by 53 publications

References 8 publications

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

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

Evaluation of the Performance of a Combined Tillage Implement with Plough and Rotary Tiller by Experiment and DEM Simulation

Bionic Design of a Potato Digging Shovel with Drag Reduction Based on the Discrete Element Method (DEM) in Clay Soil

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