推土板触土曲面几何特性与动力学有限元分析  

Geometrical Properties and Dynamic Finite Element Analysis on SoilEngaging Surface of Dozer Blade

作　　者：张鹏[1,2] 郭志军[2] 张帅[2] 望红浩 

机构地区：[1]黄河交通学院 [2]河南科技大学车辆与交通工程学院

出　　处：《工程机械》2015年第9期22-30,7,共9页Construction Machinery and Equipment

基　　金：国家自然科学基金资助项目(51175150)

摘　　要：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 investigate into a minimal resistance mechanism when the dozer blade's curved surface contacting chips of soil a dozer-blade model was designed with 550 cutting angle for the paraboloid,curve surface,bionical surface,cycloidal surface,and involute surfaces in A type and B type,while designing for comparison a flat dozerblade in 900 of cutting angle.And then,mathematic models were constructed for the 7 types of curved surface to calculate the first type's fundamental magnitude E,F and G,and the secand type's L,M and N,plus principal curvature K n along the neat line,respectively.Finite element analysis has been done of blade-soil interaction of the modal blades while graphs were drawn for the E,L,and K n,in consideration of results from finite element analyses to have completed a relationship between geometric features of the blade's contact curve and the mechanical behavior.Thus that the resultant conclusion can be provided as a theoretical reference for the blade-curve design for energy saving.

关 键 词：推土板 触土曲面 有限元分析 动力学特性 几何特性 

分 类 号：TU623.5[建筑科学—建筑技术科学]