Optimization Model for Resorting Capacity of Marshalling Station under Considering Proportion of Direct Trains

The optimization for resorting capacity of marshalling station should refer to actual needs. After the completion of strategic loading station, the proportion of direct trains will increase, and the amount of reclassification in the network will decrease, affecting the capacity needs of each station. So this paper constructs an optimization model for resorting capacity of marshalling station under considering the proportion of direct trains, calculates the proportion of direct trains, the traffic organization program, and the capacity of marshalling stations to relate to each other, sets an accurate variable to describe resorting capacity of marshalling station, and then successfully solves the problem by the mathematical software LINGO. The result shows that the higher proportion of direct trains does not mean the better, there is an optimum value to minimize the total cost. The optimization result of this model is precise and effective, and the desired effect is achieved.

摘要编组站改编能力的优化确定要以实际的改编需求为依据. 战略装车点建成后，始发直达列车的开行比重将有所增加，路网中的车流改编量会在一定程度上下降，从而影响各站点的改编能力设定. 针对这种情况，本文构建了考虑始发直达比重的编组站改编能力优化模型，将始发直达比重与车流组织方案、编组站改编能力关联起来，设置了具体的改编能力决策变量，利用LINGO数学软件实现求解. 研究表明，始发直达比重并非越高越好，存在一个最佳值使得总成本最小化. 模型确定的改编能力优化方案精确、有效，达到了预期效果.