犁面前部土体表层位移场分布有限元分析  

Analysis of Distribution of Displacement on Soil Surface in Front of Plow with FEM

作　　者：翟力欣[1] 姬长英[1] 丁启朔[1] 郁隐梅[1] 

机构地区：[1]南京农业大学工学院,南京210031

出　　处：《农业机械学报》2011年第10期45-50,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50675107)

摘　　要：由三坐标测量机获得犁体曲面的点云数据,然后利用Pro/E的逆向造型工具反求出犁体曲面,并将反求模型导入ANSYS/LS-DYNA软件中完成犁体耕作过程的动力学模拟仿真。仿真结果表明,在与土体-犁体接触点垂直的平面内,土体位移以与犁体接触点为中心呈环带状向四周逐渐减小。并将模拟结果与土槽试验的结果进行对比分析,验证了模拟过程的可行性。The plough surface was re-formed by using Pro/E＇s functions based on measured points,which were scaled with 3-D coordinate scale instrument.And then ANSYS/LS-DYNA software was used to carry out the turning dynamics simulation of the tilling plough.The direction of soil velocity was vertical to the surface of plough,and its distribution was like radiating.The distribution of equivalent stress was like isoline,and the data was becoming smaller from the contact point to outer.The results of simulation were verified by the data of experiments in soil bin.

关 键 词：犁体曲面 逆向工程 土体位移 有限元 土槽试验 

分 类 号：S233.1[农业科学—农业机械化工程]