滚装甩挂运输牵引车调度优化及作业模式类比分析

针对滚装甩挂运输新船型可“直进直出”条件下的“边装边卸”作业模式，与传统船型“船艉 进出”条件下的“先卸后装”作业模式对比，建立滚装甩挂码头牵引车调度的混合整数规划模型， 并设计遗传算法求解模型。通过对比不同规模算例下CPLEX与所设计遗传算法的实验结果，验证模型的正确性和算法的有效性。结果表明：相较于传统船型“先卸后装”作业模式，新船型“边装边卸”作业模式在运营成本方面可降低约15%；当装卸任务分布密集时，卸船任务靠近船艏运营成本越高，装卸任务分布稀疏时，卸船任务远离船艏运营成本越高；总体而言，“边装边卸”作业模式的运营成本低于“先卸后装”作业模式。研究结论可为“边装边卸”作业模式下的港口滚装甩 挂作业调度提供决策支持。

Scheduling Optimization and Operation Mode Analysis on Ro-ro Tractor-and-trailer Transportation

This paper focuses on a new operation mode of "loading while unloading" under the condition of "straight in and straight out", and compared with the traditional operation mode of "unloading before loading" under the condition of "stern in and out". A mixed integer programming model was developed for the scheduling optimization on tractorand-trailer inside the ro- ro terminal. The genetic algorithm was used to solve the model. The CPLEX solver and the algorithm were applied for the example analysis of different scales to verify the effectiveness of the model and the algorithm. Results show that, compared to the traditional operation mode of "unloading before loading", the new ship "loading while unloading" operation mode can reduce the operating cost by about 15%. For the new operation mode, when loading and unloading tasks are relatively heavy, the operation cost of unloading tasks close to the bow is higher; when loading and unloading tasks are relatively light, the operation cost of unloading tasks far from the bow is higher. Overall, the operating cost of the "loading while unloading" operation mode is lower than that of the "unloading before loading" operation mode. The study results provide references for the operation scheduling optimization of the ro- ro tractor-and-trailer transportation.