车底需要数最少的旅客列车始发范围优化模型

Optimal Model of Passenger Trains Departure Time Range with Least Passenger Train Stock Number

研究目的:在归纳旅客列车始发时间范围影响因素和介绍客车车底需要组数确定方法的基础上,深入分析旅客列车始发时间域与车底需要数之间的相互关系,进而建立车底需要数最少的旅客列车始发时间域优化模型,并提出传统方法与启发式方法相结合的求解算法,为确定车底需要数最少的客车开行方案提供决策依据。研究结论:(1)客车车底需要数是衡量铁路旅客列车开行方案优劣的重要指标,且会在很大程度上影响到铁路客运的运营成本和运营效益,而旅客列车始发时间域则是决定车底需要数的重要因素;(2)以车底在配属站和折返站停留总时间最少为目标建立优化模型,可得到车底需要数最少的旅客列车始发时间范围,对优化旅客列车开行方案具有一定的实际意义。

Research purposes： Based on generalizing the influential factors of passenger train departure time range,as well as introducing the determination methods of the needful passenger train stock number,this paper deeply analyzes the relationship between passenger train departure time range and needful number of passenger train stock.Then,the optimal model of passenger train departure range with least numbers of passenger train stock is established,while the solving algorithm of traditional method combining heuristic algorithm is put forward,which can provide decision-making basis for determining optimized passenger train plan. Research conclusions：（1） The needful number of the passenger train stock is an important index of passenger train plan,and it will influence the operation cost and efficiency of railway passenger transportation to a great extent.The passenger train departure time range is an important factor to determining the needful number of passenger train stock.（2） The optimized passenger train departure range with least number of train stocks can be got by establishing optimization model taking the minimal overall time of staying in departure station and turn-back station as objective.It has a certain real significance to optimize passenger train plan.