铁路枢纽通过能力计算方法

Method for Computing the Carrying Capacity of Railway Junction Terminal

以铁路枢纽作为1个整体,给出铁路枢纽通过能力的定义,并以能够通过铁路枢纽的车流量最大为目标函数,以经过枢纽设备的车流量总和不超过该枢纽设备的通过能力为约束,构建铁路枢纽通过能力计算模型;建立枢纽车流径路表和枢纽通过能力推算表,确定车流的优先级及计算策略,给出初始流量的确定方法。从合理的较大初始流量开始,以满足枢纽设备能力约束为前提,按照车流优先级由高到低,逐步限定能力紧张设备的流量,从而得到枢纽通过能力。根据给出的模型和算法开发的铁路枢纽通过能力计算软件已在郑州等铁路枢纽通过能力计算中得到成功应用,验证了算法的可行性和实用性。

The carrying capacity of railway terminals regarding the railway terminal as a whole was defined.The calculation model for the carrying capacity of railway junction terminal was established with the maximum vehicle flow through railway junction terminal as objective function and with the total vehicle flow through the terminal facility no more than the carrying capacity of terminal facility as the constraint.The tables were set up to calculate the vehicle flow routing and carrying capacity of junction terminal.The priority of vehicle flow and the calculation strategy were determined,and the method was framed to determine the initial vehicle flow.The method for calculating the carrying capacity of railway junction terminal is：beginning from a larger reasonable initial vehicle flow and with satisfying the capacity constraint of terminal facility as precondition,according to the vehicle priority from higher to lower,gradually limiting the vehicle flow passing though the bottleneck terminal facility.The developed software based on the proposed calculation method and model has already been successfully applied in Zhengzhou Railway Terminal and other terminals to calculate the carrying capacity,which has verified both the feasibility and practicability.