Study On Capacity Analysis Method Under The Operation Of Mixed Systems Of Rail Transit

In recent years,the number of Urban Rail Transit Systems that have been opened in our country can no longer meet the needs of passengers for travel,but the construction of the lines requires more funds,therefore,this paper puts forward the design scheme of Hybrid Operation Urban Rail Transit Train on the existing high-speed railway line.However,high-speed railway and urban rail transit are two different modes of transportation,and the mixed operation of the two systems will inevitably have an impact on the railway's carrying capacity.Based on the above background,this thesis has carried out study on the calculation of operating capacity under the mixed operation of high-speed railway and urban rail transit.The main work of this thesis is:(1)Through an overview of China's railway carrying capacity,the characteristics and influencing factors of China's high-speed railway and urban rail transit are analyzed,and three methods of railway carrying capacity calculation are emphatically analyzed.Through comparative analysis,UIC406 operation diagram compression method is more applicable that is used in the calculation of the operating capacity of the hybrid system.(2)On the basis of knowing how the train runs,according to the principle of Compressed train diagram,the shortest time occupied by the operation diagram is used as the optimization goal of the calculation model.And according to the constraints such as train effective time period,pure operating hours of the interval,train tracing interval time,train parking plan and other constraints,a calculation model of mixed system carrying capacity based on the Compressed train diagram is established.Then using the global search capability of the genetic optimization algorithm,we calculate the minimum time that the optimal solution corresponds to the operating diagram of all trains,and calculate the maximum operating capacity using the Compressed train diagram.(3)This thesis takes the passenger segment of station A to station F on a high-speed railway in the south as the research object.According to the current high-speed railway train operation schedule and operation diagram,the urban rail transit trains are interspersed with the departure interval of the high-speed railway train departure station.The simulation takes the maximum departure interval and the minimum departure interval of high-speed railway trains as examples respectively.By comparing the train diagram of general painting and the Compressed train diagram at the same interval time,the occupied time of the Compressed train diagram is significantly shortened,and the railway operating capacity coefficient Greatly improved;taking one day as the train operation cycle,adding urban rail transit trains within an effective period of one day,comparing and analyzing the improvement of the carrying capacity before and after compression of the operation map,the value of the railway carrying capacity after the operation map after compression is greatly reduced.The simulation results show that,on the basis of ensuring the safety of train operation and reducing the construction cost,in this paper,the design scheme of the hybrid operation of Urban Rail Transit Trains on the existing high-speed railway line is proposed,which can effectively improve the operational capacity of the railway,it shows the feasibility of the railway operation capacity calculation method based on the Operation Diagram compression method proposed in this paper.Figure31,Table12,Reference41.