Selection Method Of Train Fault Rescue Schemes For Urban Rail Transit Based On Train Operation Adjustment Strategy Optimization

With the rapid development of urban rail transit and the rapid increase of passenger flow in the system,the urban rail transit system has entered the stage of high-density driving,the number of trains running online is increasing,and the probability of train fault during the operation period is also increasing.If the main line train fails to be dealt with timely and effectively,a large number of trains on the line may be delayed,a large number of passengers will stay at the platform,affecting the operation organization of the line and the normal travel of passengers along the line.Therefore,according to the actual line conditions and operation conditions,it is of theoretical and practical significance to make clear the organization process of train fault rescue,design and select appropriate train fault rescue scheme,and make the fault train exit the main line operation service as soon as possible.First of all,combined with the existing research results,the basic theory of train fault rescue is elaborated in detail.The concept and principle of train fault rescue are defined.According to the actual situation and theoretical basis,the organization process of train fault rescue is divided into stages,the operation time standard or calculation method is given,and the factors affecting the efficiency of train fault rescue are discussed,which lays a foundation for the establishment of the model of train fault rescue selection.Secondly,the paper designs and analyzes the train rescue schemes due to faults.Based on the strategy optimization of train operation adjustment,the paper establishes the selection model of train fault rescue schemes,selects the number of canceling trains and the time from fault occurrence to recovery to the planned running interval as the optimization objective of each train fault rescue scheme.The model considers the time before train fault,the time after train fault and the time after train fault rescue as the train specific constraints and basic constraints of train operation.The integer linear programming model is solved by using CPLEX solver,and the calculation efficiency meets the requirements.Finally,using the actual urban rail transit line design and operation data,the case design,research and analysis are carried out.Twelve typical scenarios of train fault rescue are designed,and the results of train fault rescue selection under different train operation density,different train fault location and different layouts of parking lines are analyzed,and the influence of propulsion rescue speed on the results of train fault rescue scheme selection is further studied.The results show that the selection of train rescue scheme due to faults is different under different train operation density with the same train fault locations,and different train fault location with the same train operation density.The change of propulsion rescue speed has a significant impact on the selection of train fault rescue schemes.