Research And Implementation Of The Calculation Tool For The Capacity Of Urban Rail Transit Trains Entry And Exit Of Depot

As one of the typical scenarios of urban rail transit operation,the depot has the characteristics of complex business,flexible layout and poor automation.However,at present,the calculation of the capacity of trains entering and exiting the depot mainly depends on the working experience of designers or manual verification,which is not only cumbersome but also inefficient,which is not conducive to the work of relevant personnel.Therefore,this thesis aims to design a traction calculation tool which can calculate the capacity of urban rail transit trains entering and exiting the depot.Firstly,this thesis analyzes the system structure of the traction calculation tool used to calculate the capacity of trains entering and leaving the vehicle base,and designs the traction calculation tool by separating calculation,data and scene,so that the traction calculation tool can be applied to different application scenarios.At the same time,this thesis defines the function of each key module,and further analyzes the application of the depot according to the unique characteristics of the depot.Secondly,this thesis studies the relevant principles of train operation simulation calculation.Combined with the calculation method of multi mass point model,this thesis uses the improved single mass point method to complete the basic traction calculation of the train,which solves the problem of low calculation accuracy of the traditional single mass point model.At the same time,this thesis draws lessons from the traditional step iterative algorithm and selects the hybrid variable step algorithm to calculate the emergency braking envelope of the train,which improves the calculation accuracy.For the emergency braking trigger curve of the train,this thesis selects the IEEE1474.1 safety braking model for calculation.On this basis,it further calculates other curves such as alarm curve and recommended speed curve,and designs a compensation algorithm to solve the error problem in the ceiling speed boundary area.In addition,because the traditional operation simulation algorithm cannot meet the operation requirements of impact rate,by comparing the traditional train simulation algorithm,according to the actual operation requirements and relevant technical limitations,combined with the multi tree model and depth first algorithm,this paper designs the train operation simulation algorithm based on impact rate limitation,and realizes the train operation data generation algorithm with the strategy of maximum performance.Then,this thesis analyzes the calculation principle of the access capacity of the vehicle base in detail,and studies the two operation processes of in and out of the warehouse and in and out of the depot respectively.Considering the technical limitations of train operation process and operation,in order to make the calculation interval closer to the actual situation,aiming at the relevant calculation of tracking interval index,this thesis proposes a non-interference calculation model different from the traditional calculation model,and designs a tracking interval orientation optimization algorithm based on the temporary speed limit in front of the station.Finally,this thesis designs and implements the software of train operation simulation and the related calculation of vehicle base access capacity,and designs a special solution for the key problems and iterative errors in the program implementation.At the same time,combined with the specific line data,the relevant calculation functions of the tool are verified,and combined with the verification results,the key factors affecting the ability of trains to enter and leave the depot are analyzed.The traction calculation tool studied in this thesis has the characteristics of wide application range and strong interaction.It has been verified and tested in the actual line.