انجمن هیدرولیک ایران
نشریه هیدرولیک
2345-4237
4
3
2009
11
22
Application of Genetic Algorithm for Determining the Existent Friction Coefficients in the Real-life Pipe Networks as an Inverse Problem
بکارگیری الگوریتم ژنتیک در مساله معکوس تخمین ضرایب زبری لوله ها در شبکه های تحت فشار
19
35
85526
10.30482/jhyd.2009.85526
FA
مریم
شهبازی
جمال
محمد ولی سامانی
استاد گروه سازههای آبی، دانشکده کشاورزی، دانشگاه تربیت مدرس
Journal Article
2009
03
23
An integrated approach for determining the existent friction coefficients in water networks is<br />proposed. As pressurized systems age, the carrying capacity of network decreases because the internal<br />roughness increases with the aging of pipes. This can lead to loss of satisfactory performance and<br />uneconomic operation. Therefore, rehabilitation of an existing network becomes very important<br />problem in water industry. Determining the real physical characteristics of pipes for network analysis<br />is a regular component of the rehabilitation process. Pipe friction coefficients cannot be determined<br />explicitly by direct measurement, they are determined implicitly, as an inverse problem, from<br />measured model outputs (pressures). Values of friction coefficients are determined in a way that they<br />should yield a reasonable match between measured and predicated pressures in the network. One<br />problem associated with the Re-calibration of real-life pipe networks is the lack of field measurements,<br />which can sometimes, lead to the formulation of an ill-posed inverse problem. In this study certain<br />methods have been utilized to tackle this problem. The hydraulic analysis of steady and quasi-steady<br />flow and optimization process are combined to develop a program. By selecting a proper optimization<br />method (Genetic Algorithm) the inverse model was developed and verified successfully in a case<br />study.
http://jhyd.iha.ir/article_85526_8bf189c38c5a9524853644ddb6f10660.pdf