关键词: 深松铲, 离散元, 土壤扰动, 耕作阻力, 仿生法

Abstract: In order to solve the problems of difficulty in breaking the soil and high tillage resistance of the touching part of the traditional deep loading equipment, the tillage behavior of the deep loading shovel designed with shark dorsal fin was analyzed based on the discrete element method, so as to reduce the operational resistance and energy consumption of the deep loading shovel. In this paper, a shark-like dorsal fin shovel tip specimen was designed, and the performance was compared with that of an undesigned deep pine shovel without fins. A discrete element model was established to solve the vertical penetration soil resistance of different structures, soil disturbance, soil movement and the force of the deep-pine shovel with fins were analyzed during the deep-pine process. The results show that during the working process of the deep-pine shovel with fins, the disturbance degree of each layer is the tillage layer, the plow subsoil layer and the heart soil layer in descending order, based on different working speeds, the mixing of soil particles, the soil disturbance effect and the tillage resistance of the deep-pine shovel with fins are investigated in the same deep-pine depth, and the optimal working speeds of 3.60-4.33 km/h are obtained. Combined with the field test, it can be seen that the deviation between the real tillage resistance (1 904 N) and the discrete element simulation value (1 941 N) of the band-fin deep-pine shovel is 1.9% when the deep-pine thickness is the same. The experimental results proves that the deep-pine shovel with fins proposed in this paper can effectively break the plow bottom and provide a reference for scientific research on cultivated land in the northeast region of China.

Key words: subsoiler, discrete element, soil disturbance, tillage resistance, biomimetic method