Optimization On Train Timetable And Rolling Stock Circulation Plan Of Urban Rail Transit With Express/Local Mode

The acceleration of urbanization has brought continuous expansion of urban rail network scale.Urban rail transit lines have gradually extended from city center to suburbs,which increases the proportion of long-distance passengers.The distribution of passenger demand in space and time becomes more and more imbalance.Adopting express/local mode can not only meet the fast travel demand of the long-distance passengers,but also take into account travel demand of all passengers,thus improving the passenger service level.Compared with all-stop timetable,the problem of train timetable and rolling stock circulation plan with express/local mode is more complicated,which has important impact on passenger service level and enterprise operating cost.As a result,how to scientifically and rationally design train timetable and rolling stock circulation plan with express/local mode is worth studying.With express/local organization mode,this paper focuses on the integrated optimization problem of train timetable and rolling stock circulation plan under timevarying passenger demand.Firstly,based on the modelling of time-varying passenger distribution process with overtaking mode,the train timetable optimization model with express/local mode is constructed.Next,by considering rolling stock circulation plan,an integrated optimization model of train timetable and rolling stock circulation plan is presented,aiming to realize the comprehensive benefits of passenger and enterprise.The main research work and conclusion of the thesis are as follows:(1)Develop and solve the train timetable optimization model with express/local mode.With the objective of minimizing the passenger travel cost and train running cost,this paper presents an optimization model of the train timetable and express/local mode with overtaking,and then designs a genetic algorithm to solve the model.The model characterizes the passenger flow distribution process with overtaking mode in detail.Then,with the constraints of station overtaking,passenger first-come-first-severe rule and train capacity,the type(express or local)and arrival/departure time of each train are optimized in the proposed model.The case study shows that the passenger travel cost can be reduced by 6.3% and the train running cost can be reduced by 5.2% when compared with all-stop model.Compared with regular-headway timetable,the obtained timetable can reduce the passenger travel cost by 10.1%,and reduce the train running cost by 5.2%.(2)Develop and solve an optimization model of integrating train timetable and rolling stock circulation plan with express/local mode.Regarding the urban rail transit line with two depots,this paper presents an integrated optimization model of train timetable,rolling stock circulation plan and express/local mode with overtaking,aiming to minimize the passenger travel cost and enterprise operating cost,and then designs a hybrid genetic algorithm to solve the model.Considering the coupling relationship of train timetable and rolling stock circulation plan,this model optimizes the type,arrival/departure time of each train and rolling stock circulation plan,aiming to reduce the number of rolling stocks,thereby saving the enterprise operating cost.The case study shows that the obtained timetable can reduce three rolling stocks,thereby saving enterprise operation cost by 5.9%,when compared with single direction timetable without considering rolling stock circulation.Compared with all-stop timetable,the obtained timetable can accelerate the rolling stock circulation,thereby reducing two rolling stocks and saving the enterprise operating cost by 6.7%.43 figures,19 tables and 72 reference literatures exist in the thesis.