三角网格法绘制等水压线若干问题的研究  

Research on several problems of pipe network isobar drawing by Triangulation Algorithm

作　　者：于志强[1] 赵新华[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072

出　　处：《给水排水》2009年第2期107-111,共5页Water & Wastewater Engineering

基　　金：国家自然科学基金资助项目(50778121);天津市科技创新专项资金项目(06FZZDSH00900)

摘　　要：三角网格法是自动生成管网等水压线最常用的方法,而在实际管网中,由于管线较为复杂,只将节点作为离散数据点绘制的等水压线往往误差较大。通过分析三角网格法的特点,对于管段提出了三角形边覆盖全部管段的离散数据点的收集原则,并针对曲线管段、存在折点的管段、较长管段和跨接管段四种情况给出了具体的处理方法;对于阀门和水泵提出了等效管段法以正确反映水压的突变。同时结合工程实际,讨论了适当取舍要素和选取离散数据点范围的问题。实践证明,依据此方法绘制的等水压线能够更为准确地反应管网中水压的变化情况。Triangulation Algorithm is the common method to draw isobar for pipe network automatically. But in practical pipe network, due to the complexity of pipes, the isobar is usually inaccurate if the discrete points just contain junctions. This paper put forward the principles of discrete point collecting： triangulation edges should cover all the pipes. The specific processing method is presented for curved pipes, pipes with breakpoint, longer pipes and crossover pipes. For pumps and valves, the equivalent pipe method is introduced to reflect the pressure mutation correctly. Elements selection and the range of discrete point collection are also discussed to improve the operation efficiency. The practice proves that the isobar drawn by the methods in this paper would represent the pressure changes more accurately.

关 键 词：三角网格法 管网 等水压线 离散数据点 

分 类 号：TU991.36[建筑科学—市政工程] TP391.41[自动化与计算机技术—计算机应用技术]