PDD爆管定位模型的改进与应用  

Improvement and Application of Pressure Drive Demand Pipe Burst Location Model

作　　者：刘倍良 余健[1] 黄帆 刘晓飞 麦华景 叶军威 LIU Bei-liang;YU Jian;HUANG Fan;LIU Xiao-fei;MAI Hua-jing;YE Jun-wei(College of Civil Engineering,Hunan University,Changsha 410082,China;Guangzhou Water Supply Co.,Guangzhou 510600,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]广州市自来水公司,广东广州510600

出　　处：《中国给水排水》2019年第23期68-72,共5页China Water & Wastewater

摘　　要：目前,压力驱动节点流量(PDD)爆管定位模型中的管网漏失系数多为随机赋值,即在爆管定位模型运行时,计算机匹配一个能快速结束定位运算的漏失系数值。该方法虽可节省运算时间,但可能导致背景漏失量的计算值与实际背景漏失量不符,进而影响模型定位精度。为此,提出一种新的漏失系数计算方法,建立改进的PDD爆管定位模型,并将其应用于G市某区实际管网的爆管定位。结果表明,改进的PDD爆管定位模型的定位精度较高。At present,pipe leakage coefficients of pressure drive demand(PDD)pipe burst location model are mostly assigned randomly,that is,the computer matches a leakage coefficient value that can quickly finish the location operation when the model is running.Although this method can save computation time,it may cause the calculated value of the background leakage amount to be inconsistent with the actual background leakage amount,thereby affecting the model location accuracy.Therefore,a new method to calculate the leakage coefficient was proposed,and an improved PDD pipe burst location model was established,which was applied to the burst location of an actual pipe network in a certain area of G city.The results showed that the improved PDD pipe burst location model had a high location accuracy.

关 键 词：爆管定位 压力驱动节点流量 管网漏失系数 

分 类 号：TU991[建筑科学—市政工程]