【作者】 王哲；

【导师】 黄肖玲；

【作者基本信息】 大连海事大学 ， 物流工程（专业学位）， 2022， 硕士

【摘要】 在保障国家经济体稳定发展的进程中,钢铁业起着举足轻重的作用,其产量与规模稳居世界第一,钢铁产量的持续增长使得中国成为全球最大的铁矿石进口国。而港口是进口铁矿石供应链的关键节点,铁矿石进口量的大幅度增长,对其接卸效率提出了更高要求。因此,如何在现有作业资源的基础上,提高作业效率成为矿石码头降本增效的关键。泊位与堆场作为铁矿石入港作业系统的重要环节,作业工序连续且相互影响,优化其单一环节难以达到整体系统最优。同时,矿石码头堆场中料堆数量、大小及位置均处于动态变化中,但现有优化方法均未能对动态变化进行准确描述。因此,为实现铁矿石入港作业的高效低成本运转和港口企业精细化管理,本文基于联合优化思想及网格化策略,构建了以泊位选择、机械配置、矿石堆放位置为变量,以船舶在港时间和作业成本最小的双目标联合分配优化模型。其次,根据模型特点设计和改进NSGA-Ⅱ算法,运用测试函数验证了改进算法在解的均匀分布、收敛等方面的性能。最后,通过算例分析得到前沿非劣解,并运用性价比法求得Pareto最优解,进而对比分析联合分配与单独分配所得的最优方案,结果表明联合分配模式可通过优化港口资源配置,降低船舶在港时间和作业成本,提高港口运行效率,同时堆场网格化为实现港口精益化和柔性化管理奠定坚实基础。更多还原

【Abstract】 In the process of ensuring the stable development of the national economy,the steel industry plays a pivotal role,with its production and scale ranking first in the world,and the continuous growth of steel production has made China the world’s largest importer of iron ore.The port is a key node in the supply chain of imported iron ore,and the substantial growth of iron ore imports has put forward higher requirements on its receiving and unloading efficiency.Therefore,how to improve operational efficiency on the basis of existing operational resources has become the key to reduce costs and increase efficiency of ore terminals.As an important part of the iron ore entry operation system,berths and yards have continuous and interactive operation processes,and it is difficult to optimize a single link to achieve the overall system optimization.At the same time,the number,size and location of piles in the ore terminal yard are in dynamic change,but the existing optimization methods cannot accurately describe the dynamic change.Therefore,in order to realize the efficient and low-cost operation of iron ore entry operations and the refined management of port enterprises,this paper constructs a joint bi-objective allocation optimization model with berth selection,machinery configuration and ore stacking location as variables and the minimum ship time in port and operation cost based on the integrated optimization idea and grid strategy.Secondly,the NSGA-Ⅱ algorithm is designed and improved according to the model characteristics,and the performance of the improved algorithm in terms of uniform distribution of solutions and convergence is verified by using test functions.Finally,the frontier non-inferiority solution is obtained through the case analysis,and the Pareto optimal solution is obtained by using the cost-performance method,and then the optimal solution obtained by joint allocation and separate allocation is compared and analyzed.The results show that the joint allocation model can improve the port operation efficiency by optimizing the port resource allocation,reducing the ship time and operation cost,improving the efficiency of port operation.And at the same time,the yard grid lays a solid foundation for realizing lean and flexible port management.更多还原