Collaborative Optimization Of Car-flow Allocation For Freight Trains Based On Adjacent Technical Stations Under The Condition Of Uncertainty

The car-flow allocation plan is the core content of the technical station stage plan,which is significant for improving efficiency and benefit of technical stations.The properly and effectively formulated freight train allocation plan can reduce the time of cars dwelling at the station and reduce the operation cost of railway freight transportation while ensuring the safety and efficiency of the operation in the station.In on-ground operations,the car-flow allocation in the technical station is closely related to the freight train operation between adjacent technical stations,which makes the optimization research of the collaborative car-flow allocation plan between technical stations highly necessary.The main contents of this paper are as follows.(1)The construction and analysis of a car-flow allocation model for one single technical station.First,the analysis of the uncertain factors that can affect the car-flow allocation operation at technical stations,such as the uncertainty of freight trains breakup operation time,marshalling operation time and the marshalling content of the departing trains.Then constructing a stochastic fuzzy chance-constrained programming model based on a single technical station,and designing a hybrid algorithm combining the stochastic fuzzy simulation algorithm and genetic algorithm as the model solution.(2)Study on car-flow allocation between adjacent technical stations.Conduct an analysis of connection and impact of distribution operation between adjacent technical stations,then a feasibility study of the collaborative distribution operation.Based on the previous study and analysis,assigning different priorities to the freight train at the technical station,and building a collaborative car-flow allocation model of the technical station considering uncertain factors(3)In this paper,the real traffic flow data of China Railway Jinan Group Co Ltd is used to verify the model and algorithm.The feasibility of the collaborative car-flow allocation model is verified by comparing the calculation results of freight train collaborative allocation operation between adjacent technical stations with the results of freight train allocation operation model in a single technical station under certain and uncertain conditions respectively.