Simulation Analysis Of High Speed Train Departure Headway Compression Strategy

China’s high-speed railways have led the world in terms of construction scale and operation speed,but there is still room for improvement in operational efficiency.Compressed train headway is a way to improve the efficiency of Railway transportation.We can formulate train headway compression strategies through theoretical analysis,but the feasibility and specific effects of these strategies need to be verified through experiments.Computer simulation can build a virtual scene similar to the real scene,which can replace the experiment in the real scene.Therefore,computer simulation technology can be used to study the train headway,which can not only verify the correctness of the theory,but also save resources and timeTrain headway include six types: Arrival headway,departure headway,section headway,passing headway,arrival-passing headway,passing-departure headway,train headway is generally the largest.Due to the low speed in train departure and arrival process,and the long throat area,the arrival and departure headway are larger,which are the bottleneck of train headway.Focusing on departure headway,this paper studies the compression strategy of train headway,and puts forward two methods of compression departure headway: compress the time of a train within the first block and change the train departure operation process.In the first chapter,the background and significance of this research are explained,and the existing research on train headway and there shortcomings are summarized.The second chapter explains the concept and calculation method of train departure headway,analyzes the process of train departure operation,carries out numerical calculation,and analyzes the influencing factors and bottlenecks of train departure headway.In the third chapter,two compression strategies of departure headway are proposed,which are shortening the first block and segmented unlocking the departure route,the train departure process under the two strategies and the restriction conditions of the two strategies are analyzed respectively.The fourth chapter introduces the train departure simulation model,which based on Shanghai Hongqiao station(high speed filed).The model takes train parameters,station line parameters,and compression strategy as input,and it can output the train departure headway.This model can not only visually display the train departure process,but also accurately measure the departure headwayIn chapter 5,the model is used to conduct an upward departure experiment to measure the departure headway under different strategies.The experimental results show that the departure headway of Shanghai Hongqiao station(high-speed field)can be compressed up to65 s.The departure headway compression strategy proposed in this paper has good practicability and has certain guiding significance to the transportation organization of railway stations.