Integrated Optimization For Train And Wagons In Railway Terminal With Multiple Marshalling Yards

As economy moves towards a stage of high-quality development,railway transportation has received more and more attention and policy support from the government due to its advantages suah as low energy consumption,low cabon,safety and economy.The ever-increasing transport demand places higher demands on railway terminal with the railway infrastructure has been continuously improved and the volume of freight has continued to rise.As an important node for the transfer and distribution of passenger and cargo flow in the railway network,the railway terminal is mainly responsible for the receiving and dispatching of train flow and the placing-in and taking-out of wagon flow.It’s also a key node of coordination with the capacity of yards and routes,and it is of great significance to the organization and optimization of railway terminal for the whole-way transportation work.Based on the above background,this paper selects the integrated optimization for train and wagons in railway terminal with multiple marshalling yards.This paper firstly introduces the development status and trend of railway transportation and the status and role of railway terminal,and expounds the research background and research significance.The research direction is selected by combing and analyzing the current situation of domestic and foreign literature research.Then it briefly introduces the concept of railway terminal and related basic theories such as wagon flow organization.Secondly,this paper selects the railway terminal with multiple marshalling yards operating in parallel and the railway terminal with the primary and auxiliary marshalling yards to optimize the problem for train and wagon.For the former,the problem is formulated as a mathematical model which considers some constraints indicating the railway directions connecting marshalling station,handling stations connecting marshalling station,the capacity of train arrival,breakup,accumulation,makeup,departure,and the capacity of transshipping wagons between different marshalling stations.The objective function makes minimization of the total cost of inbound train moving,wagon reorganization and accumulation,and local car shunting.According to the specific structure of the programming model,an integrated approach with two stage combining greedy generating procedure and asynchronous iteration heuristic is given and is abbreviated as IA-TS.Then an experimental scenarios are given to test the proposed approach.For the latter,the problem is formulated as a mathematical model which considers some constraints indicating the capacity of train arrival,breakup,accumulation,makeup,departure,and the capacity of transshipping wagons between different marshalling stations.The objective function makes minimization of the total cost.The improved IA-TS approach is given to complete the model solution.Then an experimental scenario is designed to verify the performance of the approach.Finally,the optimization problem for train and wagons in railway terminal with multiple marshalling yards is summarized and prospected.It summarizes the research content and methods of this paper,and puts forward the problems existing in the current research combined with the actual situation,then makes a prospect for the future research direction.