Study On Model And Algorithm Of Train Working Diagram Of Modern Tram

The train working diagram of the trams is a comprehensive plan for the trams' transportation work,at the same time,it coordinates the work of transport departments,and ensures the normal operation of the entire transportation.Efficient,quality and practical diagram not only can greatly improve the work efficiency,but also plays a decisive role in driving safety.Compared with train and other urban rail transportation,such as subway.tram has its own characteristics,and the compilation of the diagram has its own complexity too.With the continuous development of the tram,more and more cities have been used trams,with which the running routing is becoming more and more complex,which is changed from single form to complex form.Meanwhile,the characteristic of the passenger flow also has the big change,this puts forward higher requirements for the organization of the trams working diagram.Based on the above analysis,the main contents of this dissertation are as follows:Firstly,the dissertation introduces the basis of the organization of the trams working diagram,including features,elements,principles,procedures and puts forward the overall flow chart of the organization.It provides the basis for establishment of the train working diagram model.Secondly,according to the basis of the second chapter,this dissertation establishes the model of the tram working diagram,which is programmed automatically and researches on model solving algorithm.The model of tram working diagram is composed of two core parts:Timetable calculation model and running routing model.For the timetable calculation,this dissertation used push-point method to solve the model.It obtained the arrive and departure time of each train in each station by push-point method and tram train at the departure station(or final station)originating(or ending)time;For the running routing model,its taken the shortest time of the tram as the objective function.And this dissertation solve the running routing model by assignment method.After that,the dissertation studied some key problems in the programming of the tram working diagram,including the passing-through capacity in the nested running routing,the setting up of the return station and the choice of the return path.At last,the dissertation taken the example of Nanjing No.1 tram line as example to verify the accuracy and effectiveness of the model and the algorithm.Then this dissertation studied the problem of automatic adjustment of the tram operation,including analyzing the adjustment process and strategy,establishing the objective function and constraint condition of the automatic adjustment model of the tram.According to the objective function and constraint condition,it is known that solution of the model is a multi-objective optimization problem,so,particle swarm optimization algorithm is selected tosolve the train operation regulation of tram.Then The algorithm is studied in detail,and finally,the correctness of the model and algorithm is verified by an example.Finally,this dissertation designs and realizes the trams operators dispatching system based on model and algorithm.The function of the system,the system requirements,the overall design of the system function modules are mainly introduced.The system has strong human-computer interaction ability,rich practical function,and is divided into six function modules: Timetable management,Operation chart management,Basic data maintenance,Traffic plan management,Field display,Dispatching command management.The system realized the concept of “intelligence and integration”,and greatly improve the management level and operational capacity of the transport department.It made some meaningful exploration for the development of the trams.