A Comprehensive Study on the Mechanical Properties of Bulldozing Plate Soil Engaging Surface Based on the Entropy-Weighted Grey Relational Analysis Method

To reduce the working resistance and soil adhesion in the process of soil tillage or engineering construction, this paper takes the bulldozing plate as the research object and takes the cutting angle and the directrix form of the Soil engaging surface as the design variables and designs 15 groups of bulldozing plate models for the soil bin experiments. The test results show that compared with the conventional circular bulldozing plate, the horizontal working resistance of the bionic bulldozing plate with 50 degrees, 55 degrees, and 60 degrees cutting angles is reduced by 44.46 %, 39.74 %, and 10.32 %, respectively. 55 degrees cutting angle bionic bulldozing plate to reduce adhesion and front soil fluctuations best; each performance index of the parabolic bulldozing plate is relatively balanced and stable. An entropy-weighted grey relational analysis method is proposed to quantitatively analyze and sort the comprehensive performance of bulldozing plates. Then, the influence law between the horizontal resistance, vertical resistance, and the total resistance of the bulldozer during stable operation and soil adhesion and soil fluctuation state is studied. The hypothesis of the internal influence relationship between the intrinsic micro-geometric characteristics and the macroscopic comprehensive mechanical properties of the soil engaging surface of the bulldozing plate is proposed, and it is pointed out that the essence of the change of the cutting angle and the directrix form of the soil engaging part is the change of the directrix curvature of the soil engaging surface and the soil. It is proposed to optimize and edit the directrix curvature trend of the soil engaging surface and then reverse the directrix equation so as to realize the optimal design of the soil engaging surface. The research in this paper provides a reference for the design and optimization of reducing adhesion and resistance of soil engaging components.