Research On Establishment And Evaluation Of The Stability-based Train Working Diagram Of Passenger Dedicated Lines

For a long time, due to the insufficiency of our railway transportation, the government has paid too more attention in strengthening transport capacity while sometimes ignored transportation reserve and stability requirements. The construction of passenger dedicated lines will greatly ease the contradiction between transport capacity and demand, and higher requirements for transport quality and the stability of the timetable is urgent. Therefore, it is a foreground research field to design a stability timetable based on stability which is just the research objectives in the paper.First the timetable stability mechanism is analyzed. According to the characteristics of the passenger dedicated line, the timetable stability concept is defined and the evaluation for stability index functions is established. Then, we give the way, which combines analytic evaluation of timetable stability evaluation with simulation method. In the paper two-stage model based on stability is established and relevant algorithm is proposed to design for stable timetable. The details are as follows:1. Define the timetable stability in theory, propose that the timetable stability is described from the following three aspects: common operating state of the timetable, its anti-interference ability and its self-restoring capacity. Accordingly, we propose five evaluation index functions based on a random timetable stability theory.2. Introduce a color-timed Petri net to construct respectively the operating mould of train regular occlusion or quasi-mobile occlusion and station interlock control system. Exspect software is used as a simulation platform to establish the timetable stability evaluation.3. Respectively propose steps of both the analytical method and the simulation method for the evaluation of timetable stability. Analyzing their advantages and disadvantages, we present the evaluation idea from the combination of these two methods. Finally, the effectiveness of the evaluation method is proven from the example of Beijing-Tianjing passenger dedicated line.4. Establish a two-step model and the corresponding algorithm for preparing a timetable with certain stability. The first step is to propose a feasibility timetable. Learn from the experience of its predecessor. According to the characteristics of passenger lines, the feasibility timetable is established by the 0-1 model. The second step is to adjust the feasibility timetable to a certain stability timetable. Given the interference time distribution of fuzzy circumstances, the main idea of the second step is how to arrange a proper buffer time in order to make a stable timetable. By way of a grey opportunity-constrained programming model, the establishment of stability timetable is present. It is an uncertain-grey-planning model, which has the characteristics of goal diversity, goal variability and constraint changeability.This paper presents a heuristics algorithm for preparation of feasibility timetable. The algorithm is given by simulating the process of the man-made designing timetable, and used to seek feasible solutions. The analysis of a different kind of conflicts in railway operation and the corresponding relief algorithm are further given in the paper. For a stability timetable, we combine the grey simulation technology and the multi-objective genetic algorithm, and put forward multi-target grey opportunity-simulation algorithm.5. Propose the railway timetabling and evaluating integration platform based on the stability. the MVC-based software is developed and utilized in the cases of using cases analysis, function design, modular components division, process design, we guarantee the software system to meet current demands, such as the easy maintenance and scalability. Based on this system, we take WuHan-GuangZhou passenger line for example and verify the effectiveness of the model.