燃气管网水力计算图节点计算机自动编号的方法

Method of numbering the nodes of gas network's waterpower calculation drawing automatically by computer

在利用Visual C++6.0完成燃气管网水力计算图人机对话计算机输入的基础上,管网节点实现了计算机自动编号。建立双向链表的数据结构,解决了管网节点计算机自动编号的两个关键技术:点捕捉和线捕捉。探讨了绘制管段、删除管段、截断管段和改变管段流向时节点编号变化的规律。采用数组记录管网节点编号,根据这个数组就可以生成管网的节点关联矩阵和环路矩阵,记录管网的拓扑信息,生成管网水力计算所需数据文件,并为水力计算图的输出提供图形准备。

At the base of inputting the waterpower calculation drawing of gas network by computer with ‘Visual C ＋ ＋ 6.0＇, the nodes of gas network can be numbered automatically. Two key techniques of snapping points and snapping lines are settled as a result of data structure of doubly linked list. The changing disciplinarian of nodes＇ number is discussed when drawing pipe-segment, deleting pipe-segment, cutting pipe-segment and changing flow direction. All these can be memorized by an array. Then, the node incidence matrix and circuit matrix of gas network can be created. So analysis-situs structure of gas network can be got, which provides the data preparation for gas network＇s waterpower calculation, and prepare for output of waterpower calculation drawing.