Study On The Train Units Operation Problems Of Passenger Dedicated Rail Network

Train units operation issue is one of the key problem of passenger dedicated lines'operation which has a great influence on the safety, efficiency, benefit and service quality. In about 2-3 years, the passenger dedicated lines network will be formed. And research on the operation of train units in a network condition has been put on the agenda. However, most of the existed civil research mainly focuses on the train units operation of lines rather than network, which cannot meet the needs in the future. The related research abroad cannot apply into our country either due to the difference in operation pattern, network scale and so on. Therefore, this paper focuses on the operation of train units in a network condition, especially on the train units operation pattern and planning. The main works of this paper are showed as follows:1. Aiming at the feature of train lines, layout of maintenance resource, build plan of dispatching depot, this paper proposes an operation pattern of train units that cluster operation, dynamic reserve and universal prepare and manage train units. This pattern advantages the cooperation of running, reserve and maintenance of train units and can improve the usage of train units and decrease the needed fleet size.2. In connection with the characteristics of train units operation plan problem, this paper comes up with an establishing approach to the train units operation plan which optimizes the train units operation, maintenance, and reservation integrately; setting the maximum efficiency, minimum maintenance number and least maintenance work time as the optimization objective, considering the constraints of maintenance system, operation pattern and connecting conditions, this paper builds a multi-objective optimization model of train units operation plan.3. According to the characteristic of train units operation network and ants travel, this paper proposes a rolling solving idea, which transfer the train units operation plan optimization problem into several optimization problems in small cycle. For these train units operation plan optimization problems in small cycle, this paper designs an improved Ant Colony Algorithm which boosts by time-series.4. This paper proposes evaluation indicators to estimate the effect of rain units operation plan optimization and how the train units operation, maintenance and reservation coordinate.5. Taking Beijing-Tianjin inter-city passenger line and the timetable under network condition as example, respectively, this paper makes the train units operation plan in cluster-type operation pattern and dynamic reservation pattern, and further analyzes the influence of train units maintenance system and train units depots'capacity on train units operation efficiency and the coordinational level of train units operation plan.