摘要
本研究针对低山丘陵地区甘薯种植模式,设计了一种满足机械化收获要求的小型甘薯收获机,并对关键部件挖掘铲进行单独建模、模态分析,得到其固有频率。为了获得工作中挖掘铲的最小工作阻力,利用LS-DYNA对铲片切削土壤的过程进行数值仿真,并进行了单因素试验以及三因素三水平的正交试验,得出挖掘铲铲片的工作阻力曲线及其各种条件的极值;通过极差分析方法对试验结果进行分析,获得影响挖掘铲工作阻力的三个主要因素,其影响强弱依次为入土角度>入土深度>牵引速度。
In this research,a small sweet potato harvester that meets the requirements of mechanized harvesting was designed for the planting mode of sweet potato in low hill region.The key component-excavating shovel is modeled and modal analyzed separately to obtain its natural frequency.In order to obtain the minimum working resistance of digging shovel during the working sate,LS-DYNA was used to simulate the soil cutting process.The single factor experiment and three levels orthogonal test were carried out to acquire the working resistance curve and the various conditions for shovel piece of extremum.The three major factors that affect the work resistance of the digging shovel were discussed,and the impact strength is entry angle > entry depth > traction speed.
作者
罗志豪
刘玉
张庆俊
徐志鹏
吴利明
李月琪
尚可欣
Luo Zhihao;Liu Yu;Zhang Qingjun;Xu Zhipeng;Wu Liming;Li Yueqi;Shang Kexin(School of Mechatronic Engineering,Jiangsu Normal University,Jiangsu Xuzhou 221116)
基金
江苏省省级一般项目“智能控制甘薯收获机”(202010320176Y)。
