摘要
为保证白菜幼苗时期的质量需对白菜幼苗时期进行除草,设计了一种白菜幼苗株间除草刀具。在充分掌握白菜幼苗株间作业环境特征及其条件的基础上,测定土壤密度、白菜幼苗根系密度、杂草根系密度;阐述除草刀具的工作原理,运用ANSYS Workbench有限元仿真软件建立除草刀具模型,通过材料确定、网格划分、添加约束和载荷及结果分析来验证除草刀具的可行性,运用EDEM2024离散元仿真分析软件建立规则的单球面半径均为2 mm的土壤颗粒模型、长度为50 mm,半径为1.5 mm的直柱体白菜幼苗根系模型、单球面颗粒紧密堆积构成的半径为0.5 mm的球颗粒杂草根系模型并且搭建除草刀具-白菜幼苗根系-杂草根系-土壤间作用的离散元模型,设置除草刀具前进速度分别为0.1、0.2、0.3 m/s,入土角度分别为15°、20°、25°,通过离散元仿真模拟得出除草率和伤苗率,用Design-Expert13软件分析仿真试验得到当前进速度为0.3 m/s、入土角度为20°时,达到除草率最大化和伤苗率最小化要求,为后续研究与试验提供理论参考。
In order to ensure the quality of Chinese cabbage seedling,it is necessary to weed during the Chinese cabbage seedling stage.A weeding knife for Chinese cabbage seedling is designed.On the basis of fully mastering the characteristics and conditions of the working environment among Chinese cabbage seedlings,the soil density,root density of Chinese cabbage seedlings and weed root density are measured;explain the working principle of the weeding knife,the finite element simulation software ANSYS Workbench is used to establish the weeding knife model,and the feasibility of the weeding knife is verified through material determination,meshing,adding constraints and loads and result analysis.The EDEM2024 discrete element simulation analysis software is used to establish the regular soil particle model with a single sphere radius of 2 mm,a straight cylindrical Chinese cabbage seedling root model with a length of 50 mm and a radius of 1.5 mm,and a ball particle weed root model with a radius of 0.5 mm formed by the close accumulation of single sphere particles,and a discrete element model of the interaction between the weeding knife,Chinese cabbage seedling root,weed root and soil.The forward speed of the weeding knife is set to be 0.1,0.2,0.3 m/s,and the penetration angle is set to be 15°,20°,and 25°.The weeding rate and seedling injury rate are obtained through discrete element simulation.The simulation test is analyzed with Design-Expert13 software,and the current penetration speed is 0.3 m/s.When the penetration angle is 20°,the requirement of maximizing the weeding rate and minimizing the seedling injury rate are met,which provides a theoretical reference for subsequent research and test.
作者
马浏轩
张洪宇
葛宜元
李云杰
田坤
陈立冬
刘明普
Ma Liuxuan;Zhang Hongyu;Ge Yiyuan;Li Yunjie;Tian Kun;Chen Lidong;Liu Mingpu(School of Mechanical Engineering,Jiamusi University,Jiamusi,Heilongjiang 154007,China;Heilongjiang Province,Key Laboratory of Field Agricultural Equipment Engineering Technology,Jiamusi,Heilongjiang 154007,China)
出处
《机电工程技术》
2026年第3期31-37,73,共8页
Mechanical & Electrical Engineering Technology
基金
黑龙江省创新团队项目(2021-KYYWF-0639)
中央引导地方科技发展专项(ZYYD2022JMS005)
新一轮省“双一流”学科协同创新成果建设项目(LJGXCG2022-128)
黑龙江省“优秀青年教师基础研究支持计划”(YQJH2024237)。
