多供应商大宗整列直达列车联动发车分析研究

Analysis of Linkage Departure of Entire Direct-Train for Multi-Suppliers Transporting Bulk Commodities

对于由多供应商提供大宗原材料的企业,供应商的列车发车间隔将影响企业的库存水平。为此,将着重研究在收货方平均库存最小目标下的多供应商的整列直达列车联动发车间隔关系。由于不同供应商的供货量、始发直达的列车运输量、途中的运输时间或路径差异均会对列车到达间隔产生影响;故分别解析了多供应商列车运输量相同与不相同、每个供应商年供货量相同与不相同4种组合情况下的列车联动发车间隔优化方法。最后,给出了算例分析,结果显示,相对于随机的发车间隔,企业的平均库存水平降低了24.2%。

For enterprises whose bulk raw materials are supplied by multiple suppliers, the train departure interval of suppliers may affect their inventory level. This paper focuses on the linkage departure interval of entire direct-trains between multi-suppliers under the target of minimum average inventory of the customer. Due to the fact that the arrival interval will be influenced by the supply volume from different suppliers, freight volume of originating direct train, and the delivery time or path differences in transit, it respectively analyzes the optimization methods of linkage departure interval under four combinations of freight volume for multi-suppliers and the annual supply volume of each supplier. Finally, the corresponding numerical example is given, and the results show that the average inventory level of customer is reduced by 24.2% compared to the random departure interval.