【摘要】 城市供水管网是城市最重要的生命线工程,相对于地上结构,地下供水管网具有更高的易损性。由于供水管网多埋于地下,管道的早期破坏难以及时发现。本文提出了既有供水管网局部漏损识别的第2个方法:假设在管网的不同位置存在不同程度的局部漏损,计算监测管段的流量,以监测管段流量的计算值和监测值之间的误差最小为目标来识别出局部漏损的位置和程度。通过算例分析对本文方法的有效性进行了验证,并与既有供水管网局部漏损识别的第1个方法进行了比较。结果表明,本文方法在准确率和分辨率两个方面均优于第1个方法。本文解决了供水管网健康监测和诊断中的一个基本问题。更多还原

【Abstract】 Water distribution systems are the most critical lifeline facilities in cities,and are more fragile compared with above-ground structures.Losses are not easily discovered in water distribution systems at the early stage,since most water distribution systems are buried under ground.This paper proposes the second method for the identification of an existing local loss in a water distribution system,in which,the local loss is assumed at different positions with different extents,and the flow rates at monitoring stations are then calculated, and the loss is identified by minimizing the difference between calculated and monitored flow rates at monitoring stations.The effectiveness of the method is verified by an example.This method is compared with the first method,and it is shown that this method is better than the first method both in accuracy and resolution.This study resolves one fundamental problem in health monitoring and diagnosis of the water distribution systems.更多还原