基于时间窗的铁路重载运输空车回送优化

Optimization on Empty Wagons Distribution with Time Window in Heavy Haul Railway

根据重载铁路运输特点,将其划分为装车区和卸车区两个部分,对完整的空车回送过程进行研究。为保证装车的连续性和稳定性,以空车早到或延误车小时最小为目标,以满足装车点空车需求、卸车区线路通过能力、装车点时间窗要求、列车最小追踪间隔时间、列车组合及分解类型、方式及数量为约束,建立了基于时间窗的重载铁路运输空车回送优化模型,旨在提高空车回送效率和降低企业运营成本。以大秦线重载铁路的实际数据对模型进行了验证,计算结果表明了模型的正确性和有效性。

The heavy haul railway is divided into two parts,i.e.the loading region and the unloading region,according to its characteristic.the whole process of empty wagons distribution is researched.To guarantee loading continuity and stability,the model is proposed to minimize the empty wagons multiplying hours of arriving in loading station early or late and subject to the constraints of the required empty wagons in loading station,rail capacity in unloading region,the time window of loading station,train minimal tracking interval and the type,way and quantity of wagons combination in combination station and decomposition in decomposition station.The aim is to improve the efficiency of empty wagons returning and reduce the operating costs.The data from DA-Qin heavy haul railway in China are performed to testify the model's correctness and effectiveness.