Research On Technology Of High-speed Railway Train Group Operation Simulation System

In view of the unbalanced coordination problem between the leapfrog development of fixed facilities and the high operation speed of mobile equipment,the variety of models,the complexity of operation organization and the difficulty of dispatching and command under the condition of high-speed railway network in China,in order to weaken the influence of the coexistence of high-speed and medium-speed trains,multiple types of train blocking modes and train control modes on China ' s railway operation and scheduling,to meet the requirements of theoretical research and engineering application of railway transport organization,to alleviate the operation pressure of dispatching and command,to improve the passing ability and resource utilization of high-speed railway,to meet the analysis and planning requirements of high-speed railway network system infrastructure,to optimize the design scheme of railway line,to quantify the adaptability of train schedule and improve the passing ability of railway,to analyze the system failure and delay and the influence on subsequent train fluctuation,it is necessary to use relevant theories to construct the key technology simulation model and carry out the simulation technology research of high-speed railway train group operation in China.On the basis of reading and studying the corresponding research results of scholars at home and abroad,the authors combed the train group driving simulation theory and method.Based on the characteristics of China ' s high-speed railway transportation organization,the authors constructed the technical and theoretical framework of the high-speed railway train group operation simulation system,and integrated the basic simulation data such as infrastructure data,EMU data and train timetable data to realize the signal system model,the vehicle control logic,the train station operation model and the multi-concurrent simulation algorithm.The CTC function is constructed by the simulation module of the dispatching centralized control system,and the train group driving simulation technology is discussed in detail from the aspects of system architecture construction,basic data management and train control system modeling.The main research contents include the following six aspects :(1)In order to realize the simulation of single train running in the interval,the force of high-speed EMU under different working conditions is analyzed and studied.The abstract class of the bottom layer of the motion model is constructed,and the traction and braking modes of each type of train are specified and classified.Based on this,the motion model of high-speed EMU is constructed and the simulation research is carried out.(2)In order to realize the simulation of multi-train interval operation tracking,a train control model applied to the simulation system is established for the actual scene of high-speed railway safety protection overspeed control vehicles.Based on this,the core algorithm of train control is realized.By simulating the emergency braking curve and the trigger logic of common braking curve,combined with the underlying abstract class of basic equipment model,the simulation study of multi-train tracking train control model of high-speed railway train group is carried out.(3)In order to realize the simulation operation of high-speed railway train group network,the synchronous asynchronous simulation principle is used to explore the specific application logic of synchronous asynchronous simulation strategy in the simulation process of high-speed railway EMU.Based on the dynamic management mechanism of thread pool,the operation cycle coverage of train group,CTCS-2 / 3signal system logic and CTC scheduling centralized control simulation are realized,and the simulation model of multi-concurrent train group operation control under the same asynchronous architecture is constructed.(4)For the purpose of realizing the dynamic display simulation of high-speed railway train group,the infrastructure structure of the road network is taken as the underlying data framework.The actual LKJ data of the road network and the design and construction data are accessed in various ways.Based on the multi-concurrent train group control simulation model under the same asynchronous architecture,the dynamic display simulation technology of high-speed railway train group is studied.(5)For the purpose of calculating the railway carrying capacity,combined with the existing technology and framework,and based on the real railway network data,the feasibility of the train tracking interval scheme on the target line is first analyzed.Then,the calculation scenarios of the carrying capacity of large hub stations,the carrying capacity of sections and the carrying capacity of stations under the requirements of the transformation of existing lines are built,and the relevant models and algorithms are designed.The effectiveness is verified by the simulation technology of high-speed railway train group operation.(6)In order to analyze the influence of high-speed railway late propagation,based on the real traffic data,the probability model of railway infrastructure equipment fatigue degree subject to the random system accident distribution and the cumulative distribution of CDF is constructed.Based on this,the random fault module of equipment is developed,the random interference set of traffic simulation is established,and the train late propagation model and scene are built.Through the simulation of equipment failure,the influence degree and fluctuation range of equipment failure on the transportation order are analyzed,and the propagation characteristics of late influence are explored,so as to provide means and support for the optimization of abnormal traffic organization scheme.The simulation platform of high-speed railway train group operation involves a series of problems,such as train motion model,road network structure construction,road network mileage conversion,train group parallel,train traction calculation,signal system optimization,train control calculation,train control parameter adjustment and so on.It belongs to the cross problem of railway multidisciplinary and multi-field.To carry out the simulation research of train group operation based on multi-model technology,not only the braking ability can be checked by microscopic motion simulation,but also the traffic density and passing ability can be improved.At the same time,the planning and design of auxiliary network can be carried out macroscopically,which provides strong support for improving the service level of railway network operation.