下落方案与入线结构的“契合性”及其优化效应

Conditionality and Its optimization for Fall-Down Plan and Line-Mapping

根据下落算法和入线算法的不同优化机理及不同选编目标条件下下落算法的本质差别,分析两种优化机理的对立统一性;侧重研究下落方案与入线结构的“契合性”及在其影响下选编调车最优解的变化规律。在此基础上,重新界定了在不同选编目标、不同组号构成条件下下落方案的选取标准和选取范围;实现调车作业主要效率指标最优条件下的充分“减溜”优化。研究表明,选编最优解未必来自所谓的“最优”下落方案,寻求最优解必须考虑“契合性”发生的优化效应。为此,提出多方案组合筛选方法,并用例子证明其有效性和通用性。

The unity of opposites between the fall-down algorithm and line-mapping algorithm is analyzed based on their individual essences for shunting optimization. The interaction conditionality between the fall-down plan and line-mapping is analyzed and the law of the best shunting-plan influenced by it is discussed. Based on the a- bove discussion, the optimization standard of the fall-down algorithm and the selection of operating plans on the condition of different shunting aims and different car-flow structures are redefined. Furthermore, the optimiza- tion for reducing the number of free-rolling trips under the condition of best shunting targets is realized. It is shown that the best shunting-plan is not necessarily brought by the best fall-down plan and the interaction con- ditionality between the fall-down plan and line-mapping for the best shunting-plan should be considered. The composite selection method and some examples are given to illustrate our idea.