Research On The Key Technologies Of Periodic Train Operation Diagram Compilation For High-speed Railways Based On Regional Coordination

With the continuous expansion of the scale of Chinese high-speed railway network,the increasing structural complexity,and the growing demand for passenger transport,there are many deficiencies in the existing high-speed railway transportation organization model,which is mainly based on cross line and supplemented by transfer,reflected in:low compliance with passenger demand,uneven utilization of line capacity,limited design of passenger transport products and difficult preparation of train diagram,and the operation efficiency of EMU is not high.Under the new road conditions,studying the theory and technology of train diagram preparation under the condition of high-speed railway network is conducive to further enhancing the market competitiveness of high-speed railways and realizing the development of the new era.On the basis of summarizing the existing train diagram compilation methods and analyzing the organization mode of regional collaborative transportation,combined with regional division,cyclic line plan and periodic train diagram technology,this thesis studies the theory and method of periodic train diagram compilation of high-speed railway based on regional collaboration.The main research work includes:(1)Research on the basic theory of high-speed railway train diagram compilation based on regional cooperation.This thesis analyzes the current situation,characteristics,shortcomings and reasons of existing high-speed railway train diagram compilation in China,and studies the principle,advantages and key technologies of train diagram compilation of high-speed railway based on regional cooperation.(2)Research on the regional division technology of high-speed railway based on reasonable driving distance.Use multiple Logit sharing rate models to calculate the reasonable driving distance of high-speed railways in various provinces,build a high-speed railway traffic network,consider the maintenance capacity of motor trains,take the least cross-regional passenger flow and maximize intra-regional connectivity as the optimization goals,build highspeed railway regional division multi-objective optimization,and solve it by using the multiobjective evolutionary algorithm based on reference vector guidance.Taking the currently opened high-speed railway network and its region as an example,the regional division is carried out.The selection of the optimal solution gives priority to the smallest cross-regional passenger flow.Finally,the high-speed railway network is divided into nine regions.The division results are basically consistent with the situation of Chinese economic circle.On the basis of regional division,the Beijing-Shanghai high-speed railway is taken as an example to analyze the operation mode of high-speed railway main line trains under the regional coordination mode.Multiply three categories:local direct within the region,local direct between regions and local transfer between regions.(3)Research on the cyclic line plan compilation technology of high-speed railway trunk lines based on regional coordination.The generation method of the cyclic line pool in the regional cooperative mode is studied from the two aspects of the train’s starting and ending point and the stop mode.Based on the line pool,considering the station service frequency,intra-regional direct service frequency and inter-regional one-time transfer service frequency constraints,and taking the intra-regional direct reach intensity,the maximum inter-regional transfer reach intensity and the minimum total stop times as the optimization objectives,an optimization model of regional coordinated cyclic line plan is constructed.Taking the Beijing Shanghai high-speed railway as an example,the layered solution of CPLEX is called by Python.The results are compared with the actual operation scheme of Beijing Shanghai highspeed railway,which proves the effectiveness of the model.(4)Research on the compilation technology of periodic train diagram of high-speed railway trunk lines based on regional coordination.This thesis analyzes and studies the compilation method of periodic train operation chart based on regional coordination,and builds the optimal compilation model of intra-regional periodic train diagram and the optimal adjustment model of operation line of inter-regional transfer scheme.On the basis of the cyclic line plan,call CPLEX through Python to optimize the compilation of periodic train diagram by region,and combine the train transfer plan to optimize the train lines between regions,and finally obtain the periodic train diagram based on regional coordination,which proves the effectiveness of the compilation process and optimization model.