天然气管网系统最优设防烈度决策
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摘要
以天然气管网工程造价、未来遭遇地震时管道结构的损失期望及灾后管网服务功能失效损失之和最小为目标函数,结合工程投资限制、管网系统抗震可靠度的分配以及部分管道设防的特殊要求,建立了天然气管网系统最优设防烈度决策模型。利用布尔立方体矩阵(BCM)不交化算法,作为多源多汇网络系统抗震可靠度分析工具。将差分进化算法的繁殖策略与遗传算法的交叉、变异相结合形成了一种新的混合遗传算法,用于天然气管网系统最优设防烈度的优化求解。以某天然气管网为例,在管道遭遇烈度为7度地震的情况下,进行了最优设防烈度的决策,给出了相应的计算结果。
A model of optimal decision on fortification intensity for natural gas pipeline network is established,taking the sum of construction cost of natural gas pipeline network,failure loss expectation of pipeline structure in future seism and failure loss for services after the disaster as minimal objective function,combined with the restrictions of project investment,aseismatic reliability for pipeline network and special requirement of fortification for partial pipelines.The cubical algorithm for disjoint of Boolean function that is applicable for reliability calculation of network system is used as the tool of aseismatic reliability analysis for multi-source and multi-terminal network system.Combined with reproduction strategy of differential evolution algorithm with the cross and variation of genetic algorithm,a new hybrid genetic algorithm is applied to the optimization solution for fortification intensity of natural gas pipeline network.Taking a natural gas network as an example,under a condition of seven magnitude seism,a decision of optimal fortification intensity for gas pipeline is made and corresponding results are given meantime.
A model of optimal decision on fortification intensity for natural gas pipeline network is established,taking the sum of construction cost of natural gas pipeline network,failure loss expectation of pipeline structure in future seism and failure loss for services after the disaster as minimal objective function,combined with the restrictions of project investment,aseismatic reliability for pipeline network and special requirement of fortification for partial pipelines.The cubical algorithm for disjoint of Boolean function that is applicable for reliability calculation of network system is used as the tool of aseismatic reliability analysis for multi-source and multi-terminal network system.Combined with reproduction strategy of differential evolution algorithm with the cross and variation of genetic algorithm,a new hybrid genetic algorithm is applied to the optimization solution for fortification intensity of natural gas pipeline network.Taking a natural gas network as an example,under a condition of seven magnitude seism,a decision of optimal fortification intensity for gas pipeline is made and corresponding results are given meantime.
引文
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2,陈艳艳王东炜等:管网系统抗震优化设计的正交枚举法,计算力学学报,1999,16(2)。
3,陈玲俐:城市供水管网系统抗震可靠性分析与优化,同济大学出版社(上海),2002。
4,李杰刘威:大型城市管网抗震可靠性分析与优化,地震工程与工程振动,2006,26(3)。
5,包元锋李杰:基于遗传算法的生命线工程网络抗震优化设计,防灾减灾工程学报,2006,26(1)。
6,李杰刘威等:沈阳市天然气管网系统抗震可靠性优化研究,世界地震工程,2007,23(1)。
7,王光远:工程结构与系统抗震优化设计的实用方法,中国建筑工业出版社(北京),1999。
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9,周南良:数学逻辑,国防科技大学出版社(长沙),1992。
10,武小悦沙基昌:布尔函数不交化的立方体算法,国防科技大学学报,1998,20(6)。
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