双翼式深松铲的仿生设计及其离散元分析

深松铲是保护性耕作中进行深松的主要工具,其品质直接影响深松的效果.在对双翼式深松铲改型设计的基础上,应用仿生技术研究成果设计出仿生深松铲,并通过Pro/E软件对改型深松铲和仿生深松铲进行三维建模.而后应用离散元软件EDEM 对两种形式深松铲进行仿真分析,得出速度为0.4、0.6、0.8、1.0、1.2 m/s时两种深松铲所受的耕作阻力.离散元分析结果表明,两种深松铲在触土过程中耕作阻力变化趋势相同.虽然仿生深松铲具有较好的土壤脱附和耐磨性能,但平均耕作阻力较之改型深松铲稍大.本研究方法为新型深松铲的优化设计提供了参考.

Bionic design and discrete element analysis of double-wing subsoiling shovel

The subsoiling shovel is the main tool for subsoiling in conservation tillage, and its quality directly influences the effect of subsoiling. In this paper, based on the double-wing subsoiling shovel retrofit design, the research achievements of bionic techniques were applied to design the subsoiling shovel, and the three-dimensional models of modified subsoiling shovel and bionic subsoiling shovel were created through the software of Pro/E. Then Discrete Element Method (DEM) was used to do analog simulations for the two kinds of subsoiling shovels, the tillage resistances of subsoiling shovels at different forward speeds were obtained. DEM analysis result showed that their variation trend of tillage resistance was alike. Although the average tillage resistances of bionic subsoiling shovel was slightly bigger than that of modified subsoiling shovel, its abrasion resistance and desorption was enhanced. This research works would provide certain foundation for improving the design of the subsoiling shovel.