基于流量熵的道路交通网络脆弱性优化
On Vulnerable Optimization of Traffic Road Network Based on Flow Entropy
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摘要: 道路交通系统是社会物流实现的重要支撑，其中重要站点的故障可能造成交通系统的运营限于瘫痪，甚至产生重大的经济影响。针对道路交通网络中的相继故障问题，从动静结合的角度分析了道路交通网络的脆弱性。为了检测道路交通网络在相继故障下的脆弱性动态变化，首先建立了道路交通网络的级联反应动力学模型；然后提出该模型中脆弱性的优化设计方案，并利用算法进化得到网络的最优设计；最后利用复杂网络理论得到道路交通网络的网络结构图，通过该算例验证了提出的模型和优化方法的有效性和实际应用性。仿真实验表明该模型和方法能有效地降低交通网络的脆弱性。Abstract: Road traffic system is an important support for social logistics .The failure of a significant site may result in the paralysis of the w hole traffic system ,and even cause a significant economic damage .In this paper ,the dynamical vulnerability of the road traffic network has been explored according to the suc-cessive failures within the system .First ,a cascade reaction model of the road traffic network has been es-tablished for detecting dynamical changes of the network vulnerability facing successive failures .Then an optimal design of the model has been proposed based on evolutionary algorithm .Finally ,the complex net-work theory is applied to obtain the network structure of a road network .And this case study is given to verify the effectiveness and practical application of the proposed model and optimization algorithm .Simula-tion results show that the proposed method can effectively reduce the vulnerability of the road traffic net-work .
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