【摘要】 本文以管网造价为优化目标,管网拓扑结构为优化参数,管网节点最低可靠度为约束条件,建立了供水管网抗震拓扑优化模型。在供水管网功能可靠性分析方法的基础上,结合单元概率重要度分析方法,利用模拟退火算法提出了供水管网的抗震拓扑优化方法,并对一典型供水管网进行了拓扑优化分析。分析表明,对于管网抗震拓扑优化这样一个组合优化问题,模拟退火算法提供了一类很好的途径,以此为基础进行供水管网抗震可靠性优化设计具有很好的效果。更多还原

【Abstract】 Lifeline systems,including transportation systems,water distribution networks,energy supply systems etc.,are indispensable to our daily life.As an essential component of lifeline systems,water distribution networks play more and more important role in modern city life.Researches on seismic capability analysis of water distribution networks are to guide the seismic design and improve the system seismic reliability.Taking network’s cost as optimization object and reliability as restriction,a network topology optimization problem is built.Using the first-order reliability method as a tool for system reliability analysis,the simulated annealing algorithm combining with elements probabilistic importance analysis is applied to solve the optimization problem of water distribution networks.An example is provided at the end of the paper,and the results show that the simulated annealing algorithm has fairly well effect for water distribution networks optimization.更多还原