轴辐式物流网络扩张的枢纽重配置优化

Hub reconfiguration optimization of hub-and-spoke logistics network expansion

为提高物流运输网络的运作效率,在传统的轴辐式物流网络中进行网络扩张及枢纽重配置优化.在综合考虑轴辐式网络内辐节点与枢纽之间的支线运输费用、枢纽之间的干线运输费用以及枢纽建造费用的基础上,建立轴辐式网络枢纽重配置优化的混合整数规划模型.通过对轴辐式网络扩张进行分析,针对辐节点的增加、减少以及需求量变化三方面。对比基准分配方案与重配置分配方案,决定是否对枢纽进行重配置优化.通过仿真算例的求解,对得到的方案进行对比分析.结果表明:节点增减和流量变化均会提高运输成本,网络的重配置能够有效减少物流运作成本.

To improve the operation efficiency of logistics transportation network,the network expansion and hub reconfiguration optimization are carried out in the traditional hub-and-spoke logistics network. A mixed integer programming model on the hub reconfiguration optimization of the hub-and-spoke network is established considering the branch transportation cost between spoke nodes and hubs,the main transportation cost between hubs and the hub construction cost. Through analyzing the hub-and-spoke network＇s expansion,the reconfiguration distribution scheme is compared with the original distribution scheme from the increase of spoke nodes,the reduction of spoke nodes and the change of demand,then to decide whether to reconfigure the hubs. Through the solution of the simulation examples,the schemes are compared. The results indicate that the changes of the nodes and the flow can both increase the transportation cost,and the reconfiguration of the network can effectively reduce the logistics operation cost.