摘要
为探究凿式犁铲(以下简称凿铲)的土壤扰动机理并构建适用于东北地区黏重黑土与耕作部件之间的仿真模型,结合EDEM仿真分析与土槽试验,与深松铲作业效果进行对比,研究凿铲对土壤的微观扰动机理和宏观扰动状态,并建立适宜东北地区土壤的耕作仿真模型。仿真与试验结果表明,深松铲对土壤进行剪切破坏,将耕作层和犁底层抬升、下落,对土壤松而不翻,不破坏原有的耕层土壤结构,土壤膨松度试验值为12.4%,土壤扰动系数试验值为59.4%,纵向截面扰动面积为52586 mm^(2),俯视视图扰动面积为116779 mm^(2);凿铲对土壤进行挤压破坏,将犁底层土壤翻耕到地表,破坏原有耕层土壤结构,土壤膨松度试验值为14.1%,土壤扰动系数试验值为64.1%,纵向截面扰动面积为54128 mm^(2),俯视视图扰动面积为233061 mm^(2),通过与深松铲作业后数据相比可知,凿铲可以实现更为明显的土壤扰动效果。同时,建立东北地区黏重黑土条件下的离散元土壤耕作模型,选用Hertz-Mindlin with JKR Cohesion模型作为土壤接触模型,确定仿真模型的各项技术参数,仿真与试验得到的土壤扰动截面轮廓基本拟合,土壤膨松度、土壤扰动系数的仿真值与试验值的相对误差为17%、4.4%,模拟仿真的数据误差范围满足要求,研究可为东北地区的土壤耕作部件离散元模拟仿真分析提供基础数据。
In order to explore the soil disturbance mechanism of the chisel plow and build a simulation model between viscous black soil and the tillage components,the operation effect was compared with subsoiling shovel and the micro disturbance mechanism and macro disturbance state of chisel plow on soil was studied,and a farming simulation model suitable for the soil in Northeast China was established.The simulation and test results showed that the subsoiling shovel sheared and destroyed the soil,lifted and fell the tillage layer and plow bottom layer,loosened the soil without turning over,and did not damage the original topsoil soil structure.The test value of soil swelling was 12.4%,the test value of soil disturbance coefficient was 59.4%,the disturbance area of longitudinal section was 52586 mm^(2),and the disturbance area of top view was 116779 mm^(2),the chisel plow compressed and destroyed the soil,ploughs the bottom soil to the surface,and destroyed the original plough soil structure.The test value of soil swelling was 14.1%,the test value of soil disturbance coefficient was 64.1%,the disturbance area of longitudinal section was 54128 mm^(2),and the disturbance area of top view was 233061 mm^(2).Compared with the data after subsoiling shovel operation,chisel plow can achieve more obvious soil disturbance effect.At the same time,the discrete element soil tillage model under the condition of heavy black soil in Northeast China was established.The Hertz-Mindlin with JKR Cohesion model was selected as the soil contact model,and the technical parameters of the simulation model were determined.The simulation and the soil disturbance cross-sectional profile obtained from the test were basically fitted.The relative errors between the simulation value and the test value of soil bulkiness and soil disturbance coefficient were 17%and 4.4%,which can meet the data error range of simulation and simulation,which provided basic data for discrete element simulation analysis of soil tillage components in Northeast China.
作者
张冲
范旭辉
李明森
李光
赵春凯
孙文良
ZHANG Chong;FAN Xuhui;LI Mingsen;LI Guang;ZHAO Chunkai;SUN Wenliang(Jilin Provincial Academy of Agricultural Machinery,Changchun 130022,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2022年第S02期52-59,共8页
Transactions of the Chinese Society for Agricultural Machinery
基金
中国科学院战略性先导科技专项(XDA28080202)
吉林省科技发展计划项目(20210202026NC)
关键词
凿铲
EDEM仿真分析
土壤耕作模型
土槽试验
微观扰动机理
宏观扰动状态
chisel plow
EDEM simulation analysis
soil tillage model
soil trough test
micro disturbance mechanism
macroscopic disturbance state
