期刊论文

Estimation of the Operation Quality of Vertical Helix Furrow Openers Based on the Discrete Element Method

中文

西南大学学报(自然科学版)

1673-9868

2019

41

12

1-7

10.13718/j.cnki.xdzk.2019.12.001

湖南省政府重大专项（湘府阅[2014]35号）； 湖南省科技厅平台建设项目（湘财教指[2014]10号）；

本校为第一机构

为了定量评价立式螺旋开沟器的开沟质量,构建立式螺旋开沟器与土壤相互作用的三维离散元模型,土壤颗粒之间选用Hertz-Mindlin with Bonding模型,以转速180 r/min、前进速度0.027 m/s模拟开沟1.88 m,利用EDEM软件Analyst模块中的标尺、查询等工具对开沟质量指标进行定量测定,结果表明沟型整齐,平均开沟宽度29.4 cm,平均开沟深度31.7 cm,开沟深度稳定性为87.32%,沟底浮土6.924 kg/m,直观给出沟两侧抛土量的分布图.开沟质量符合《田间开沟机械作业质量》（NY/T 740-2003）的要求,为立式螺旋开沟器的参数优化奠定了基础.

In order to evaluate the operation quality of vertical helix furrow openers(ditchers)quantitatively,a discrete element model was built to simulate the interaction between the vertical helix furrow opener and the soil.The Hertz-Mindlin with Bonding contact model was selected to calculate the contact force between soil particles.The ditching process was simulated by setting the rotation speed of the furrow opener at 180r/min and the forward speed at 0.027m/s,and ditching a furrow 1.88 min length.The operation quality indexes were measured by using the Ruler and Queries Tools,which can be found i...