城市供水管网瞬态水力模型的建立及应用.pdf

Construction and Application of Transient Hydraulic Model of Urban Water Supply Distribution Network Chen Ling, Liu Sui-qing，Li Shu-ping (State Key Lab of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092,China) Abstract This paper presented a new method to construct transient model on basis of steady model ： First, it calculated the evaluation value of transient flow to decide the requirement of transient analysis; Second, it used the statistic model to confirm the calculation bound and signed the distribution network; Third, when boundary conditions and other systematic parameters had been confirmed, the equations of transient could be solved using the Method of Characteristics (MOC); At last, it calibrated the model based on testing data. Contrast to traditional method, this method integrates transient model with steady model seamlessly in the process of constructing the dynamic hydraulic model of water supply distribution network, which extends the application aspect , and can be used to safety analysis of distribution network to guard against accident, such as pipe burst. Keywords ：Water Supply Distribution Network ，Transient Flow, Steady Model，Transient Model， Evaluation Value ，the Method of Characteristics (MOC) 1. INTRODUCTION With the expanding of water supply scope and the improving security requirement, it is urgent for water supply management and utility to analyse the working conditions of pipe network and to control the pressure fluctuation range, which would hel