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为探讨推土板触土曲面的减阻机理,设计切削角为55°的抛物面、圆弧面、仿生面、摆线面、渐开面A型和渐开面B型推土板模型。同时,设计切削角为90°的平板型推土板作为对照。对7种推土板曲面进行数学建模,计算各自的第一类基本量E、F和G,第二类基本量L、M和N,以及沿准线方向的主曲率κn。对所建7种推土板模型与土壤的相互作用过程进行有限元分析,作出7种推土板曲面的第一类基本量E、第二类基本量L和沿准线方向的主曲率κn图像,结合有限元分析结果,研究推土板触土曲面几何性质与力学特性的联系。所得结论可为推土板触土曲面的节能设计提供理论参考。
In order to discuss the drag reduction mechanism of the clay surface, the paraboloid, circular arc, bionic, cycloidal, involute A and involute B-type earth slab models with a cutting angle of 55 ° were designed. At the same time, the design of the cutting angle of 90 ° flat-type bulldozing plate as a control. Seven kinds of bulldozing plate surface are mathematically modeled, and the first basic quantities E, F and G, the second basic quantities L, M and N, and the main curvature κn along the direction of the normal line are calculated. The finite element analysis of the interaction between the seven models of soils and soil was carried out. The first type of basic quantity E, the second type of basic quantity L and the principal curvature κn Image, combined with the results of finite element analysis to study the relationship between the geometrical properties and the mechanical properties of the clay surface of earthwork. The conclusion can provide a theoretical reference for the energy-saving design of the earth-covered curved surface.