城市供水管网健康监测与诊断(Ⅱ)——既有局部漏损识别方法
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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。文中在供水管网用户流量预测的基础上,提出了供水管网既有局部漏损识别的一个方法,方法通过假设在管网的不同位置存在不同程度的局部漏损,计算监测点的压力,根据监测点压力的计算值和监测值之间误差最小为目标来识别出局部漏损的位置和程度。文中通过算例分析对方法的有效性进行了验证,并对具体实施中需要注意的几个问题进行了讨论。
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 a method for identification of an existent local loss in a water distribution system on the basis of user's demand forecast,in which,the local loss is assumed at different positions with different extents,and the pressure at monitoring stations is then calculated,and the loss is located by minimizing the difference between the calculated and monitored pressures at monitoring stations.The effectiveness is verified by example analysis.Some suggestions for the implementation of the method are made.
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 a method for identification of an existent local loss in a water distribution system on the basis of user's demand forecast,in which,the local loss is assumed at different positions with different extents,and the pressure at monitoring stations is then calculated,and the loss is located by minimizing the difference between the calculated and monitored pressures at monitoring stations.The effectiveness is verified by example analysis.Some suggestions for the implementation of the method are made.
引文
[1]梁建文.供水管网震害位置和震害程度的实时识别[J].地震工程与工程振动(增刊),2000,20(1):220-228.
[2]梁建文,肖笛,赵新华,等.给水管网故障实时诊断方法[J].水利学报,2001(12):60-67.
[3]梁建文,肖笛,张宏伟,等.给水管网故障实时诊断方法(II)[J].自然科学进展,2002,12(9):970-974.
[4]Liang J.Online location of seismic damage to a water distribution system[J].Earthquake Engineering and Engineering Vibration,2003,2(2):181-187.
[5]梁建文.城市供水管网健康监测与诊断(I)——用户流量的预测[J].地震工程与工程振动,2010,30(4);126-131.
[6]高桑哲男.配水管网解析与设计[M].东京:森北出版株式会社,1978.
[7]Gupta R S.Hydrology and hydraulic systems[M].Englewood Cliffs:Prentice-Hall,1989.
[2]梁建文,肖笛,赵新华,等.给水管网故障实时诊断方法[J].水利学报,2001(12):60-67.
[3]梁建文,肖笛,张宏伟,等.给水管网故障实时诊断方法(II)[J].自然科学进展,2002,12(9):970-974.
[4]Liang J.Online location of seismic damage to a water distribution system[J].Earthquake Engineering and Engineering Vibration,2003,2(2):181-187.
[5]梁建文.城市供水管网健康监测与诊断(I)——用户流量的预测[J].地震工程与工程振动,2010,30(4);126-131.
[6]高桑哲男.配水管网解析与设计[M].东京:森北出版株式会社,1978.
[7]Gupta R S.Hydrology and hydraulic systems[M].Englewood Cliffs:Prentice-Hall,1989.
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