考虑运输成本与时间竞争的轴辐式网络设计问题

Hub-and-spoke network design problem with considering transportation cost and time competition

针对轴辐式物流网络运营中的新运营商与市场中占主导地位的物流联盟企业之间的竞争.首先,从减少OD流运输成本与运输时间角度探讨了新运营商网络设计与中小规模运营商网络调整策略,以提高网络运营商的顾客市场份额占有量.其次,分析运输成本、运输时间与顾客市场份额效用函数之间的关系,提出了相应的分段、线性与非线性顾客效用函数,并建立了基于不同顾客效用函数的网络设计与网络调整混合整数规划模型.同时,为了处理计算实验的复杂性,将非线性目标函数转化为二阶锥规划约束求解.最后,通过实验分析了不同决策偏好权重、顾客效用函数、运输时间与成本对网络设计与网络调整的影响.

With operating on hub-and-spoke(H/S)logistics network,the competition between a newcomer service provider and an existing dominating alliance operator is addressed in this paper.Firstly,the H/S network design strategies of a newcomer service provider and the H/S network adjustment strategies of the small and medium-sized operator are discussed to improve their customer market share on the view of reducing transportation cost and transportation time of OD(Origin-Destination)flows.Secondly,the relation between transportation cost and transportation time and customer market share utility function is analyzed,and the corresponding step customer utility function,linear customer utility function and nonlinear customer utility function are also proposed.Then,mixed integer programming models about H/S network design and network adjustment are formulated based on the different customer utility functions.Meanwhile,the nonlinear objective function is transferred into second order cone programming constraints to overcome its complexity.Finally,the impacts of the different decision preference weights,customer utility function and transportation cost and time on H/S network design and network adjustment are analyzed through the experimental results.