基于LS-DYNA的铧式犁结构优化设计及性能分析  

Optimal Design and Performance Analysis of the Plough Structure Based on LS-DYNA

作　　者：刘明勇[1,2] 向雪 闫春爱 胡成龙 韩新光 欧阳周寰 Liu Mingyong;Xiang Xue;Yan Chunai;Hu Chenglong;Han Xinguang;Ouyang Zhouhuan(Hubei University of Technology,Wuhan 430068,China;Hubei Province Agricultural Machinery Equipment Intelligent Engineering Technology Research Center,Wuhan 430068,China;Wuchang Institute of Technology,College of Intelligent Manufacturing,Wuhan 430065,China)

机构地区：[1]湖北工业大学,武汉430068 [2]湖北省农机装备智能化工程技术研究中心,武汉430068 [3]武昌工学院智能制造学院,武汉430068

出　　处：《农机化研究》2024年第10期153-160,共8页Journal of Agricultural Mechanization Research

基　　金：湖北省重点研发计划项目(2020BBB063);国家重点研发计划项目(2018YFD0700604,2018YFD0301303)。

摘　　要：基于LS-DYNA法建立犁体与土壤的耦合接触有限元模型,讨论不同犁体导曲线、铧刃角、安装角、端点角、耕作速度对耕作过程翻垡效果和犁体应力影响,并进行试验验证。结果表明:椭圆曲面比抛物线曲面耕作时阻力更小、土壤翻垡效果更好,阻力降低5.6%,翻垡距离提升14.8%;对犁体前进速度、铧刃角、安装角、端点角进行单因素分析,发现翻垡距离随着速度增加而增加,而随着铧刃角、安装角、端点角呈现出先增大后减小的趋势。因此,通过选取合适的速度与结构参数可以提升铧式犁的翻垡性能,减低犁体阻力。In this paper,the coupling contact finite element model of plough body and soil is established based on LS-DYNA method.Based on the proposed model,the effects of guide curve,blade angles,installation angles,end angles and farming speed on the turning effect of the plough are analyzed,and the experimental verification is carried out.The results show that the elliptical surface is better than the parabolic surface.During tillage,the resistance is smaller,the soil turning effect is better,the resistance is reduced by 5.6%,and the turning distance is increased by 14.8%.The distance increases with the increase of speed,and the edge angle,installation angle,and end angle of the plough first increase and then decrease.Therefore,by selecting appropriate speed and structural parameters,the turning performance of the plough can be improved,and the plow body resistance.

关 键 词：铧式犁 有限元法 导曲线 翻垡性能 

分 类 号：S222.121[农业科学—农业机械化工程]