Research On The Calculation Theory Of Train Interval Time Of Conventional Railway

The train interval time is not only the basic theory of railway transportation organization,but also the important technical parameter of train diagram,which has an important influence on the matching of train speed and density.With the rapid development of the technical equipment of the conventional railway,the organization level of the conventional railway transportation has obviously improved,and the rationality and accuracy of the calculation of the train interval time of the conventional railway trains are also required.However,at present,the calculation and verification of train interval time is still based on the technical policy issued in 1981,which can not adapt to the development of the current transportation technology equipment.In view of this,this paper makes a systematic study on the calculation theory of train interval time on the conventional railway.In this paper,the type of train interval time is obtained,the rationality and feasibility of the calculation method is analyzed,and the calculation formula of train interval time is given.Secondly,the key parameters of the calculation method are classified,and the static parameters are checked according to the technical conditions of the dispatching command system.Two different interval time calculation methods are compared again,and the differences between the calculation methods are summarized.Then,the compression strategy of train interval time is analyzed,and the compression suggestions are given in terms of technical equipment optimization,station and section key parameters and setting the speed limit before entering the station.Finally,a case study is carried out in Taiyuan Bureau of Beijing Baotou Line to analyze the value rule of train interval time.The specific research content is divided into the following aspects:（1）The 18 types of train tracking interval time and station interval time most used in conventional railway are given.Combining with the technical conditions of LKJ vehicle equipment,the rationality and feasibility of calculating the train interval time in conventional railway according to the fixed interval distance and continuous speed control are analyzed,and the specific formulas of calculating the train interval time according to the fixed interval distance and continuous speed control are given.（2）The key technical parameters of the calculation method of train interval time are classified into static and dynamic parameters according to their value properties,and the basic principles of key technical parameters are proposed and explained.The differences between TDCS and CTC in train receiving and sending of the conventional railway are compared and analyzed in combination with the technical conditions of the dispatch and command system of the conventional railway.Check static value parameters.（3）By comparing the two calculation methods of fixed interval distance and continuous speed control,it is concluded that there are differences in the calculation methods ofI_{pa ss}、I_{arri val}、I_passarrivaland equal interval time,and there are no differences in the calculation methods ofI_departure,τ_meet and so on.Given typical parameter values and representative train grouping,the two calculation methods of train interval time were compared.The result of continuous speed control method is not obvious better,and the train interval time can be compressed more than 70s.（4）Put forward the strategy of reducing the train interval time.In terms of technical equipment optimization,some optimization strategies are given,such as automatic triggering of CTC approach and floating of driver control curve according to LKJ braking curve.In terms of the key parameters of station and section,the relationship between the length of throat area and block section,the speed limit of departure and the value of train tracking interval time is analyzed,and the value suggestion under the target of train interval time is given.The strategy of setting speed limit before entering station is put forward,and the strategy of compressed train interval time is given through data analysis.（5）Design the example calculation process of the train interval time of the conventional railway.Taking the section between Chaiguopu and Datong station of Beijing Baotou Line as an example,give the relevant data of train interval time calculation,carry out the example calculation of the train tracking interval time and train station interval time,analyze the value characteristics of different two calculation methods,and summarize the value characteristics and rules of train interval time in the example section.There are 124 figures,48 tables and 79 references.