输电线路铁塔参数化模型的杆件信息拓展研究

Study on Extension of Pole Information in Parametric Model for Transmission Tower

摘要:

输电线路三维设计中，铁塔数字化模型采取 MOD 文件参数化建模，可表达铁塔的几何线框结构信息，但由于 铁塔是由具有一定宽度和厚度的板和杆件组成的空间结构，而 MOD 文件目前仅能表述节点编号、坐标、杆件的规格、 材质、肢朝向、挂点属性和坐标信息，对于杆件之间的相对位置关系缺乏规范性描述，因此 MOD 格式和信息还需要进 行拓展和深化，才能满足铁塔数字化模型的远期需要。首先对铁塔 MOD 文件的数据结构进行了介绍; 然后从增加杆 件相对位置关系描述信息的角度出发，分析了 MOD 文件的不足之处，指出现行 MOD 格式还不能充分表达铁塔数字 化信息; 最后提出了一种能表达杆件相对位置关系的方式。

Abstract:

In the three － dimensional design of transmission lines，the digital model of the tower is constructed by parametric modeling． The structure and geometric information of the tower is expressed by MOD files． However，the tower is a spatial structure composed of plates and bars with a certain width and thickness，the MOD file of the tower can only express the node number，coordinates，bar specifications，material，limb orientation，hanging point attributes and coordinate information． The relative position relationship between members lacks of normative description． Therefore，the format and information of MOD files need to be expanded and deepened to meet the future needs of the tower digital model． Firstly，the data structure of MOD files of the tower is introduced，and then the shortcomings of MOD files are analyzed from the point of view of adding descriptive information of relative position relation of members． Finally，a new method which can express the relative position relationship of the member is proposed．