摘要
机场线具备利用富余能力开展城市货运服务的潜力。针对机场线客货共运问题,基于客货共载和货运专列两种货物运输形式,以考虑仓储、装卸及列车运行成本的货运净收益最大为目标,构建列车运行计划与货运分配方案协同优化模型,综合决策货运专列的编组停站方案、时刻表和货单分配。为快速求解模型,设计一维搜索算法对货运专列开行数量进行寻优。通过允许货运专列编组为0,保证搜索过程目标值单调递增,并利用Gurobi求解给定货运专列开行数量下的子问题。基于某市机场线案例结果表明,在不影响客运服务前提下,本文方法选择性满足货运需求,增加运营收益。相较于站站停模式,优化列车停站方案可增加5.2%的净收益;相较于固定编组模式,灵活编组在不同货运量和时效要求下可增加5%~35%的净收益,且时效要求较高时,灵活编组优势较为明显。
The airport express has the potential to utilize its surplus capacity to develop freight transportation services.To implement mixed passenger and freight transportation on the airport express,two freight transportation modes,i.e.,inserting dedicated freight trains and using the surplus capacity of existing passenger trains,are considered in this study.An optimization model on freight train service planning is developed to determine the train stopping plans,train formation,timetables,and shipment allocation.The objective of the presented model is to maximize the freight profit,which includes freight revenue,loading cost,inventory cost,and train operating cost.To solve the model,a onedimension searching approach is proposed to determine the number of inserted freight trains.The Gurobi solver is applied to produce the train service plans of the linearized model with a determined number of freight trains.The train formation is allowed to be zero to ensure the monotonic increasing of the objective function during the searching process.An experimental study based on the real airport express is performed to verify the effectiveness and efficiency of the proposed model and algorithm.The results indicate that the proposed method could enhance the operation profit by selectively meeting freight demand without disturbing the passenger trains service.Compared to the all-stop mode,allowing flexible stopping patterns of freight trains could increase the freight profit by 5.2%.Compared to the operating mode with fixed train formation,allowing flexible train formation could increase the freight profit by from5%to 35%with various freight volume and shipping time requirements.The advantages of flexible train formation are more obvious when the shipping time requirements are relatively high.
作者
李竹君
柏赟
陈垚
LI Zhu-jun;BAI Yun;CHEN Yao(Scientific&Technical Information Research Institute,China Academy of Railway Science Corporation Limited,Beijing 100081,China;Key Laboratory of Transport Industry of Big Data Application Technologies for Comprehensive Transport,Beijing Jiaotong University,Beijing 100044,China)
出处
《交通运输系统工程与信息》
EI
CSCD
北大核心
2022年第5期154-163,共10页
Journal of Transportation Systems Engineering and Information Technology
基金
国家自然科学基金(72101019,71971021)。
关键词
城市交通
城市轨道交通
客货共运
混合整数线性规划
机场线
地铁货运
urban traffic
urban rail transit
mixed transport of passenger and freight
mixed-integer linear programming
airport express
metro-based freight transportation
