集装箱码头集卡配置优化的闭合排队网络模型

以集装箱码头同贝同步装卸作业为研究对象,以提高码头作业效率、提升服务能力为目标,研究码头内部集卡数量配置优化问题.将码头作业系统视为服务网络,构建码头同贝同步装卸作业的闭合排队网络模型,刻画集卡在各个环节的作业过程,分析不同设备配置下码头作业系统服务能力,揭示制约码头整体作业效率关键环节.以码头作业成本最小为目标,考虑集卡在各个环节的排队等待时间及设备利用率,建立了基于同贝同步装卸作业的集卡数量优化模型,并设计算法对模型进行求解.本研究从服务网络角度揭示了码头作业效率与岸桥、集卡、场桥配置的关系,为码头设备调度与服务流程设计提供了依据.

Modeling the closed queueing network of truck allocation optimization in container terminals

The truck allocation problem based on double cycling is introduced to increase the handling efficiency and service availability in container terminals. The terminal operation system is regarded as a service network and a queueing network model based on double cycling is proposed. The service process of trucks is described and the service availability of the terminal handling system with different resource allocation is analyzed. Based on the analysis, the bottleneck operation which restricts the whole terminal handling efficiency is revealed. An optimization model considering the waiting time of trucks and the utilization of equipment is developed. The goal of the model is to optimize the truck allocation with minimum terminal operation cost. To solve the model, an algorithm is designed. The relationship between the terminal efficiency and the allocation of quay cranes, trucks and yard cranes from the service network's view is shown. And a reference for the equipment scheduling and service designing in container terminals is provided.