| As China’s economy has entered a new normal, bulk cargo volume decreased significantly, scattered cargo volume increased significantly, in order to improve the railway in the bulk goods market share, China officially launched the reform of railway freight transportation in 2013. In June the railway freight transport organization reform under the background of railway freight transportation is bound to put forward new requirements more on marshalling station operation organization, taking Xinglongchang marshalling station as an example, the optimization problem of operation organization of marshalling station, in order to adapt to the needs of the entire transportation market development.Firstly, changes of Xinglongchang marshalling station operation organization mode of research, reform of railway freight organization, analyzes 6 kinds of operation the level of change, including the train number, residence time of early warning, the disintegration of marshalling trains, train and operate a small special use. In the process of angular traffic,prosperous field is based on a Reverse access to arrive at the train; two is the reverse organizing train train, as to minimize the effects of angular traffic flow for the station work.Secondly, the goods change conditions, transported to the time limit has become one of the important parameters of railway cargo transport. In marshalling station arrived,disintegration, gathering, grouping, all other indicators starting in the assembly is an important link to the time limit. In the existing problem of aggregation time aggregation full axis, put forward the concept of fixed, fixed mode of description and analysis, explore the use of point set node model requires validation method of departure trains the minimum number of cars, in determining this parameter, which through the two aspects of capacity and efficiency.Finally, according to the conditions of the goods change station wagon flow optimization problem, the optimization of transport time from the perspective of the system,at the same time to consider two aspects Change is a change under the condition of different goods, the goods shipped to the time is different, in the operation of marshalling station time requirements will be different, on arrival trains would be given priority to train, train operation priority more weight. The other one is that the traditional wagon flow model rarely consider the vehicle residence time limit in the station, delivered to the limit conditions, in order to ensure the vehicle stop time at the station do not exceed the maximum residence time provisions, increase the maximum vehicle stop time at the station. The constraint conditions of the goods change station wagon flow optimization model, and the genetic algorithm combined with MATLAB, Lingo software algorithm design for the model. |
