Study On Coordination Theory And Method Of Train Operation On Urban Mass Transit Network

In the process of rapid developing of China urban mass transit network, operation and management mode of urban mass transit has gradually changed from independent single-line operation to integrated multi-line operation, and a new phase of network operation of urban mass transit has been forming. On the network, there must exist some relations and impacts between different lines. So the coordination network operation and management is much more needed. Thus, improving the accuracy of network passenger flow analysis and forecast, the balance of network capacity resources arrangement and the coordination of train operation on network from the perspective of network operation, is very important to raise the level of rail network operation, play a better role on using the overall capacity, and achieve efficiency, security and reliability of operation.Based on the development reality of urban mass transit network and the advanced experience at home and abroad, this paper take a series of related research on train operation theory of urban mass transit network taking the coordination as the goal.(1) The new features of urban mass transit network operation have been studied, and the intension and basic features of the coordination of urban mass transit network operation has been clearly described. On this basis, this paper made a simple analysis about the problems which should be coordinated, set up a basic system of the coordination research of train operation on urban mass transit network, and then defined the scope and the main content of the study.(2) The paper analysed network characteristics and the dynamic changing characteristics of passengers under the conditions of network, and summarized the evolution of passenger traffic with the network structure changes. After introduction of the combination of competition and collaboration bus passenger flow forecasting model, it could form long-term passenger flow prediction technology. Furthermore, considering the stochastic user equilibrium principle and impact of congestion, a mathematical model for optimizing passenger flow distribution of the urban mass transit network was presented. To solve the passenger flow distribution model, a combining K-short-circuit algorithm with an ant colony algorithm searching for K-short-circuits and a dynamic programming method verifing short-circuits has been designed. The model and algorithm is verified through part of passenger flow data on unban mass transit network.(3) This paper explored some new problems of unban mass transit network operation, from three aspects of cross-road seting, skip-stop train scheduling and joint operation arrangement. In particular, according to passenger flow characteristics and capacity utilization, a multi-object optimization model for skip-stop train plans, with the aims of the maximal social economy profits and the minimal total travel time of passengers was proposed. The model can be solved using an ant-colony algorithm designed in this paper to generate a best compromise train service plan, including the optimal stop-schedule plan, service frequency, as well as the social economy profit and total passengers travel time.(4) This paper studied the influencing factors and constraints exist in the relationship between the train operation density arrangements of various lines. Then it described the train operation density arrangements of urban mass transit network using the super-network flow theory, and proposed a solution method which can solve the single-line operation density arrangement under different conditions. Furthermore, the paper established a coordination evaluation index system of network train operation density arrangement, and through the DEA method evaluated the coordination of any two lines on the network. Ultimately, the evaluation results and the reasons leading to inconsistency could be got by this method, which could be used in improving harmonious train operation plan of urban mass transit network.(5) In case of the single-line train operation diagram completed, based on the passengers flow characters of urban mass transit, both the convenience and rationality of connection between different lines were considered, and then an optimization model, with the aims of the minimal total waiting time of transfer passengers and inboard passengers, was set up. Combining the inner coordination of arriving and departure time sequence of trains in transfer nodes with the exterior coordination of transfer nodes on whole urban mass transit network, a multi-layers coordination policy was proposed, and the integrated optimization of the urban mass transit system was realized through taking some small time shifts of the proposed single-line timetables.