基于坐标变换的玉米根茬三维模型建立  

3-D Modeling of Corn Root Based on the Coordinate Transformation

作　　者：王继利[1] 贾庆祥[1] 杨新义[1] 

机构地区：[1]吉林大学机械科学与工程学院,长春130025

出　　处：《农业机械学报》2011年第11期158-163,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA043604)

摘　　要：提出了一种将玉米根茬结构离散化为多段根节,根据实测统计参数,以坐标变换为理论基础创建玉米根茬随机三维模型的方法。创建模型过程中,采用NURBS曲线拟合的方法处理实测数据,分别以NURBS曲线和NURBS曲面进行形态创建和表面创建。以Matlab软件、三维CAD软件为工具,以IGES文件为接口将创建的玉米根茬模型导入三维CAD软件和有限元分析软件。所建模型可用于玉米根茬力学性能分析研究。Corn root is separated into a series of root elements.According to the statistical measured parameters,the random 3-D model of corn root was constituted based on coordinate transformation.In the model building,the measured data was fitted to NURBS curve,shape and surface of the model were expressed by NURBS curve and NURBS surface respectively.Matlab and 3-D CAD software were used as main tools.The model was saved in IGES file format which can be import into 3-D CAD software and FEA software for further analysis of mechanical properties of the corn root.The corn root modeling method is different in principle from the other existed methods and has great significance for mechanical analysis of the root system in the crop root treatment,plants reinforcement of soil and etc.

关 键 词：玉米根茬 三维模型 坐标变换 IGES文件 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]