基于离散元法的铧式犁仿真优化分析及试验  

Simulation and optimization analysis and experiment of split plough based on discrete element method

作　　者：刘明勇[1,2] 胡成龙 谢柏林 LIU Mingyong;HU Chenglong;XIE Bolin(Hubei University of Technology,Wuhan 430068,China;Hubei Agricultural Machinery Engineering Research and Design Institute,Wuhan 430068,China)

机构地区：[1]湖北工业大学,湖北武汉430068 [2]湖北省农业机械工程研究设计院,湖北武汉430068

出　　处：《浙江农业学报》2022年第11期2542-2552,共11页Acta Agriculturae Zhejiangensis

基　　金：国家重点研发计划(2017YFD0701105-03,2018YFD0700604,2018YFD0301303)。

摘　　要：本文以减小犁体阻力,提升耕作效率为目的,基于EDEM以抛物线曲面犁体为基础展开研究,对犁体耕作过程进行仿真分析,观察土壤颗粒的扰动行为,对犁体不同的导曲线、铧刃角、安装角和工作速度对于犁体耕作阻力的影响展开分析,得出了较为理想的犁体参数;结果表明,相比较于抛物线曲面,椭圆曲面在相对稳定阶段时阻力大小为1591.551 N,比抛物线曲面降低了4.4%,并且对于土壤抬升效果更加明显;对犁体的前进速度、铧刃角和安装角进行单因素分析,在安装角为25°时犁体阻力最小,随着前进速度和铧刃角增加,犁体阻力也随之增大,故在合适的范围内应选取较低的前进速度和铧刃角以降低犁体阻力。To reduce the resistance of the plough body and improve the efficiency of farming,based on EDEM,the study was carried out on the basis of the parabolic curved plough body.The plough body cultivation process was simulated and analyzed,and the disturbance behavior of the soil particles was observed.The influence of the blade angle,the installation angle and the working speed on the plough body s tillage resistance was analyzed,and the ideal plough body parameters were obtained.The results showed that compared with the parabolic surface,the resistance of the elliptical surface was 1591.551 N in the relatively stable stage,reduced by 4.4%compared with the parabolic surface,and had a better effect on soil uplift.Single factor analysis was carried out on the forward speed,blade angle and installation angle of the plough body.When the installation angle was 25°,the resistance of the plough body was the smallest.As the blade angle increased,the resistance of the plough body also increased.Therefore,a lower forward speed and blade angle should be selected within a suitable range to reduce the resistance of the plough body.

关 键 词：铧式犁 犁体阻力 土壤扰动 导曲线 离散元 

分 类 号：S222.121[农业科学—农业机械化工程]