摘要
分析双翼深松铲耕作行为是探究双翼深松铲耕作机理和优化深松效果的前提。本文采用离散元法建立了双翼深松铲的耕作模型,分析了深松过程中土壤扰动、土壤运动及双翼深松铲的受力情况。结果表明:在双翼深松铲的工作过程中,各层的扰动程度从大到小依次为耕作层、犁底层和心土层;双翼深松铲对土壤的扰动呈“扇形”分布,对土壤的扰动作用主要体现在土壤抬升、土壤的破碎和不同层土壤的混合等方面,犁底层与耕作层的混合程度大于犁底层与心土层;土壤颗粒最大运动速度下各方向数值从大到小依次为z方向、x方向、y方向;双翼深松铲在0.8 m/s耕作速度、300 mm工作深度的工况下,其土壤扰动系数为63.9%,土壤膨松度为11.1%,地表平整度为22.43 mm;双翼深松铲受到的阻力主要来源于土壤对深松铲前进的阻碍作用,双翼深松铲向上抬升土壤也受到了一定的阻力,土壤对双翼深松铲的侧面挤压作用力较小。
Analyzing the tillage behavior is the premise for exploring the tillage mechanism of double winged subsoiler and optimizing the subsoiling effect.The tillage model of a double winged subsoiler was established by the discrete element method.The soil distur-bance,soil movement,and the force of the subsoiler were analyzed.The results showed that,the disturbance degree of each layer during the working process was in the order of the tillage layer,plough bottom layer,and core soil layer.The soil disturbance caused by the double winged subsoiler was distributed in a fan shape.The disturbing effect of the double winged subsoiler on the soil was mainly reflected in soil lifting,soil breaking,and the mixing of different soil layers.The mixing degree of the plough bottom layer and the plough bottom layer was greater than that of the plough bottom layer and the core soil layer.The maximum velocities of soil particles in different directions were z direction,x direction,and y direction from large to small.Under the working conditions of 0.8 m/s tillage speed and 300 mm working depth,the soil disturbance coefficient was 63.9%,the soil bulkiness value was 11.1%,and the surface roughness was 22.43 mm.The resistance of the subsoiler mainly came from the blocking effect of the soil.The up-ward lifting of the soil by the subsoiler also produced a certain resistance.The lateral extrusion force of the soil on the subsoiler was small.
作者
李吉成
孙坤鹏
张永华
张天会
LI Jicheng;SUN Kunpeng;ZHANG Yonghua;ZHANG Tianhui(School of Intelligent Science and Engineering,Yunnan Technology and Business University,Kunming 650201,China;School of Electrical and Mechanical Engineering,Yunnan Agricultural University,Kunming 650201,China)
出处
《内蒙古农业大学学报（自然科学版）》
CAS
2023年第2期67-75,共9页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
云南省重大科技计划专项项目(2018ZC001-303)
云南省教育厅科学研究基金项目(2022J1241)。
关键词
双翼深松铲
离散元
土壤扰动
土壤运动
深松阻力
Double winged subsoiler
Discrete element
Soil disturbance
Soil movement
Subsoiling resistance
