关键词: 仿生, 深松, 减阻, 红壤, 土槽试验, 降阻率

Abstract: Due to soil compaction and strong adhesion, the subsoiler caused the problems of excessive soil disturbance and excessive tillage resistance when working on the sloping land of southwest red soil. This research adopted the technical method of engineering bionics. The body surfaces of Procambarus clarkii and sandfish lizards with excellent drag reduction characteristics were used as bionic prototypes. The tip of the subsoiler was taken as the research object. This paper designed five types of bionic geometric structure surfaces: biomimetic convex hull, microspurconvex, scale, micro spinesscale, and microthornconvex hullscale. Compared with the traditional shovel tip, a soil bin test was performed to verify its drag reduction performance and change trend of resistance reduction rate when the soil moisture content is 18.11% and 12.57% during the subsoiling process, and subsoiling speed is 0.2 m/s, 0.4 m/s, and 0.6 m/s. The results show that: when the soil moisture content is constant, the traction force will gradually decrease with the increase of the high loosening speed. When the moisture content is 18.11%, the drag reduction ability of the tip with the microspurconvex geometric structure surface is the best, and the resistance reduction rate is more than 20%. When the moisture content is 12.57%, the drag reduction ability of the blade tip with a mixed surface of microthorns, convex hulls, and scales is the best, and the resistance reduction rate is over 15%. In addition, the experiment date proposes a reference for the bionic design for drag reduction and for designing and developing new equipment in the working environment in the subsoiling process of red clay soil in Southwest China.

Key words: bionic, subsoiling, drag reduction, red soil, soil bin test, resistance reduction rate