An Operation Organization Optimization Model Of Sunset-Departure And Sunrise-Arrival Train Based On Passenger Satisfaction

With the continuous improvement of China's road network and the improvement of road network accessibility,it is an important means to improve the market competitiveness of high-speed railway transportation by opening the Sunset-departure and Sunrise-arrival train(SST)in long-distance transportation,which conforms to passenger' schedules.The contradiction between the operation of night train and the setting of skylight must be solved when the opening of SST,therefore,it is necessary to study the operation organization of SST.In this context,this paper constructs an operation organization optimization model of SST(OOOM of SST),and optimizes the train operation organization,main work are as follows:(1)On the basis of analysis the domestic and international status of the SST,such as the development,the mode of operation,the theory of operational organization optimization,and the comprehensive maintenance time(MT),combined with the actual situation of the transportation organization of passenger lines in China,this paper puts forward the idea of constructing the OOOM of SST: Based on the use of 4 hours segmented rectangular MT and the waiting for MT mode of the train,the OOOM of SST is constructed with the highest degree of passenger satisfaction as the optimization target.(2)Considering the demand for the type of Electric Multiple Unit(EMU)with higher speed level at a reasonable time in the long distance,and integrating passenger demand and railway costs,the two concepts of comprehensive benefit and relative comprehensive benefit are put forward,which are used to compare the effect brought by different speed grade EMU.By quantifying the attraction of fare,the satisfaction of travel time,the route passing capacity and energy consumption,and the rational distribution of weights,EMU type Comprehensive comparison selection model is constructed.By changing the parameters values such as the design speed of the 250 km/h of the railway line length ratio?the travel distance and the time of waiting for MT,the calculating result shows: when the design speed 250 km/h railway line ratio is over 0.8,D-EMU has an obvious advantage;when the ratio is 0.8,when the train running distance is less than 2 500 km,the D-EMU is given priority,whereas the G-EMU is given priority;when the ratio is less than 0.8,when the train running distance is less than the critical distance,the D-EMU is given priority,whereas the G-EMU is given priority.When the waiting for MT is 0,the critical distance is 2 km.The specific value of the critical distance decreases by 200 km for each additional hour of the waiting for MT.(3)Based on the passenger satisfaction survey questionnaire,combined with the D-EMU and G-EMU,the four indicators of origination time,arrival time,fare and comfort are reasonably analyzed and quantified,and the normalization process is carried out,turned into the satisfaction of departure time,the satisfaction of arrival time,the satisfaction of fare,and the satisfaction of comfort degree.Through the hierarchical analysis method of group decision,it is determined that the weights of four index satisfaction are 0.285 0,0.276 4,0.114 6,0.324 0,respectively,and the multi-objective function is transformed into a single objective function,and the optimization goal of the model is constructed.(4)Combining with the characteristics of the road network of SST in our country at present,from the Linear road network to the Tree road network,this paper constructs the OOOM of SST respectively.The related symbols in the model are defined,and the parameter relations in the process of variable logic,skylight setting,train stop and train operation are explained and restrained.Combined with the optimization goal,the the OOOM of SST of the linear road network to the Tree road network are built respectively.(5)Combined with the actual road network situation in China,the examples are used to solve and verify the optimization model under the Linear road network and the Tree road network,respectively.By determining the type of EMU and the order of train arrival,the difficulty of solving the problem is reduced,use LINGO11 to perform the operation,enter the relevant parameters,and the key elements such as the city that train stop,departure time,the waiting for MT,and MT opening time are obtained.The train operation diagram is drawn,and the result analysis and manual optimization are carried out.The solution results show that the model can obtain a satisfactory solution in a reasonable time and has good applicability.