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Discrete element method (DEM) simulation to improve performance of a mouldboard skimmer
Soil and Tillage Research ( IF 6.5 ) Pub Date : 2020-08-23 , DOI: 10.1016/j.still.2020.104764
Chris Saunders , Mustafa Ucgul , Richard J Godwin

Historically, most mouldboard plough research has been focused on improving the performance of the mouldboard itself, with very little focus on other plough components such as the skimmer. The skimmer is a critical additional component of the overall mouldboard plough which affects its performance in the field. The skimmer has a significant effect on the ability of the plough to bury topsoil and surface residues and there is a need to understand the effect of speed, depth and critical working angles on both forces and soil movement. Soil bin and analytical studies by Saunders (2002) investigated the potential to improve soil-skimmer interaction. Recent studies have shown that discrete element method (DEM) has the potential to predict both tillage forces and soil movement of tillage implements. In this study experimental and analytical work carried out by Saunders (2002) was replicated using a DEM simulation. A good correlation was obtained between the measured and predicted draught (R2 = 0.9) forces, furrow area (R2 = 0.68) and maximum soil throw (R2 = 0.77) while a fair correlation was obtained between measured and predicted and vertical forces (R2 = 0.5). It was also found that better draught force prediction can be obtained using DEM than with an analytical method. Results of the study showed that DEM has potential to accurately model tillage forces and soil movement and guide improvements to skimmer working angles.



中文翻译:

离散元素方法(DEM)模拟,以提高模板分离机的性能

从历史上看,大多数翻板犁的研究都集中在提高翻板自身的性能上,而很少关注其他刨煤机组件,例如撇渣器。撇渣器是整个刨板犁的重要附加组件,会影响其在野外的性能。撇渣器对犁犁掩埋表土和表面残留物的能力有重大影响,并且需要了解速度,深度和临界工作角度对力和土壤运动的影响。土壤箱和Saunders(2002)的分析研究调查了改善土壤撇渣器相互作用的潜力。最近的研究表明,离散元法(DEM)具有预测耕作力和耕作机具的土壤运动的潜力。在这项研究中,Saunders(2002)进行的实验和分析工作使用DEM模拟进行了复制。在测得的草稿和预测的草稿之间获得了良好的相关性(R2  = 0.9)力,犁沟面积(R 2  = 0.68)和最大土壤抛掷(R 2  = 0.77),而在测得的力和预测力与垂直力之间则存在相当的相关性(R 2  = 0.5)。还发现使用DEM可以比使用分析方法获得更好的吃水力预测。研究结果表明,DEM有潜力准确模拟耕作力和土壤运动并指导撇油器工作角度的改进。

更新日期:2020-08-23
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