摘要
建立了芯铧式开沟器和播种施肥开沟器与土壤颗粒的二维离散元法分析模型，采用离散元法研究开沟器的工作过程及工作阻力，通过改变开沟器的CAD模型和土壤颗粒参数，分析不同条件下开沟器的工作阻力。在室内土槽进行了2种开沟器的工作阻力测试，并将测试结果与开沟器工作阻力的离散元法计算结果进行了比较，两者的变化趋势基本一致，相对误差在10％～20％之间，由此初步证明了采用离散元法分析开沟器工作过程和工作阻力的可行性，为开沟器的研究和优化设计提供了一种新方法。
In order to analyze the factors that affect the performance of a furrow opener, the twodimensional DEM （discrete element method） analyzing models of two types of furrow openers and soil particles were built up. Through changing the CAD models of furrow openers, for each type of furrow openers, the operating processes and resistances in three kinds of soils with different moisture content at three different velocities and depths were analyzed by using the DEM. The performance of the openers was tested at each operating states in lab. The simulation results is in good correlation with the experimental results and the relative errors are within 10%-20%. It can be proved that it＇s feasible and favourable to analyze the performances of furrow openers by using the DEM and it provides a new method to study and design furrow openers.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2009年第6期53-57,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(60673033)
国家"863"高技术研究发展计划资助项目(2006AA04Z125)
"十一五"国家科技支撑计划资助项目(2006BAD11A01)
关键词
开沟器
离散元法
土壤颗粒
数字化设计
Furrow openers, Discrete element methods, Soil particles, Digital design
