关键词: 开沟器, 逆向工程, 有限元分析, 仿生设计

Abstract: To reduce the resistance of furrow opener and improve efficiency,the surface design of furrow opener was optimized based on bionic design method in accordance with the unique claw teeth morphological characteristics of mole cricket,whose claw teeth has outstanding characteristics of low resistance in the rapid excavation process.The reverse engineering method was used to construct 3D model of mole cricket's claw teeth,and the process of 4 teeth wedging into the soil was simulated.The results showed that there was no significant correlation between the maximum stress and the maximum strain in the process of claw tooth wedging into soil.The standard value method was used to analyze the two factors and the results were as follows.When the claw tooth T2 wedged into the soil at an angle of 35 degrees,the stress value of soil was relatively minimum and the strain value of soil was relatively maximum.Four biomorphic contour curves of claw tooth T2 were extracted and fitted to design scheme of bionic furrow opener.The design scheme of the bionic furrow opener was verified by the simulation method,and the simulation experiment of the prototype ditcher was carried out under the same condition.The results showed that the maximum stress of the optimized bionic furrow opener was reduced by 56.32% and the maximum strain of the soil was increased by 27.80% compared with the original furrow opener,the efficiency of furrow opener was improved.

Key words: furrow opener, reverse engineering, finite element analysis, bionics design