关键词: 水路运输, 集成调度, 混合整数非线性规划, 不定期船, 燃油补给, 航速优化

Abstract:

Currently, expensive marine fuel prices and the price difference at different ports have significant effects on the refueling port selection, the refueling volume, and the speed optimization on their routes. The different fuel prices affect the trade-offs between refueling levels and cargo volume. The different shipping speeds affect the balancing effects of the time consumption costs and fuel consumption costs. The scheduling decisions also affect the subsequent voyages. Considering the complex relationships and trade-offs mentioned in the factors above, an integrated scheduling solution of refueling schemes and speed optimization of consecutive voyages for tramp ships was proposed in this paper. With the objective of maximizing the profits of consecutive multiple voyages, a multiple nested expected value processing technique with a mixed integer nonlinear programming method is designed to build the model. Finally, with practical case analysis, it is verified that the integrated scheduling model proposed in this paper has obvious practicality and benefits.

Key words: waterway transportation, integrated scheduling, mixed-integer nonlinear programming, tramp ship, refueling scheme, speed optimization