基于NSGA-Ⅱ的长江过闸散货船船型论证

The Yangtze River Bulk Cargo Ship Lockage Ship Demonstration Based on NSGA-Ⅱ

针对长江干线过闸散货船船型论证过程中复杂的多目标、多约束问题,提出一种以技术经济性、过闸效率和社会效应(暂时以EEDI为计算指标)为目标,船舶主尺度上下限、主尺度比、初稳性高、系缆力为约束的数学模型,并采用第二代非支配排序遗传算法(NSGA-Ⅱ)求解,得到该多目标优化问题的Pareto前沿及对应的非劣尺度,结果表明所采用的方法切实可行,且得到的结果能够满足船东对于长江干线过闸散货船的需求,同时具有一定的社会能效效应。

According to the multi objectives and complex demonstration of ship cargo ship in the Yangtze River, through the multi constraint problems, a kind of mathematical model which takes the technology and economy property, the efficiency of passing lockage and social effect （for the time being, EEDI is used as a measure） as the goal, the upper and lower limits, the main scale ratio, initial metacentric height and the mooring force as the constraints is pro- posed. By the second generation Non-dominated Sorting Genetic Algorithm （NSGA- II）, the Pareto front and corresponding non inferiority scale of the multi objective optimization prob- lem are obtained. The results indicate that the method is feasible, and the obtained results can satisfy the owner for the Yangtze River bulk cargo ship lockage requirements, and has certain effect on social efficiency.