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论文类型：期刊论文

发表时间：2014-04-01

发表刊物：RELIABILITY ENGINEERING & SYSTEM SAFETY

收录刊物：SCIE、EI、Scopus

卷号：124

页面范围：132-141

ISSN号：0951-8320

关键字：Water distribution networks; Infrastructure; Node vulnerability; Cascading failures; Numerical simulation

摘要：Water distribution networks (WDNs) are important in modern lifeline system. Its stability and reliability are critical for guaranteeing high living quality and continuous operation of urban functions. The aim of this paper is to evaluate the nodal vulnerability of WDNs under cascading failures. Vulnerability is defined to analyze the effects of the consequent failures. A cascading failure is a step-by-step process which is quantitatively investigated by numerical simulation with intentional attack. Monitored pressures in different nodes and flows in different pipes have been used to estimate the network topological structure and the consequences of nodal failure. Based on the connectivity loss of topological structure, the nodal vulnerability has been evaluated. A load variation function is established to record the nodal failure reason and describe the relative differences between the load and the capacity. The proposed method is validated by an illustrative example. The results revealed that the network vulnerability should be evaluated with the consideration of hydraulic analysis and network topology. In the case study, 70.59% of the node failures trigger the cascading failures with different failure processes. It is shown that the cascading failures result in severe consequences in WDNs. (C) 2013 Elsevier Ltd. All rights reserved.