Study On The Optimization Of Cross-linetrain Operation Scheme On High-speed Railway

The large-scale construction of high-speed railways has improved the functions of the railway network in China,and also increased the complexity of passenger train organization.So that the research in rational cooperation between both existing lines and high-speed railways has also become particularly important.How to arrange high-speed railway and existing line resources in reason,and optimize passenger train operation scheme are urgent problems to be solved.Cross-line passenger trains are an effective method for coordinating resources,and in-depth research is necessary.The conventional operation plan is summarized according to existing research,the content and process of the preparation of the cross-line train operation scheme are studied,and the multi-objective optimization model of the stop plan and the train time are constructed Optimize the model,design the algorithm to caculate it,and verify the model and algorithm with the example of Harbin-Dalian high-speed rail.The main work of the thesis has the following aspects:(1)Combining the principles and methods of the existing line operation scheme in China,the characteristics of the cross-line passenger flow and the transportation mode,the characteristics of the cross-line train operation plan are analyzed,and the coordination and optimization of the maintenance window settings are analyzed.(2)The paper introduce the station node importance,evaluate the importance of stations on the line,and make it as a parameter of the service frequency constraint of the stop-plan optimization model.(3)Aiming at the lowest cost of stopping and the maximum saving of passengers' overall time,with the constraints of stopping services,train access,and the maximum number of stops,a multi-objective optimization model of the stopping plan is established.After determining the goal,goal value,goal priority,and priority factor,the multi-objective model is converted into goal planning model for caculation.(4)According to the analysis of maintenance window time and reasonable time domain,a model of train departure time was established,with the goal of maximum passenger time satisfaction,taking time domain and tracking interval as constraints.A new coding method is designed,and the algorithm is improved to prevent immature individuals from exiting the loop early.(5)The paper take Harbin-Dalian high speed railway as an example,using the stop model for calculation,the optimal stop scheme is obtained.And the sensitivity of stop constraint parameters is analyzed.Secondly,combined with the stop schemes of this line and cross line trains,the optimization model of train time is solved,and the improvement suggestions for the stop and operation schemes of trains are given.