Platform is a key area for passenger flow management during peak hours and the evacuation at an urban rail transit station.By using computer simulation,the passenger retention process,variation of density distribution and service levels changes are studied,the ultimate capacity of the platform at crowded period and safe levels are calculated,the time distribution and the curve of service level changes under different passenger arrival rates are analyzed.Finally,a method of early warning classification for passenger flow congestion and safety at platform based on critical control points is proposed.%站台是城市轨道交通车站客流集散和客流高峰期限流的核心区域.运用计算机仿真的方法对列车延误时站台的客流滞留、密度分布和服务水平变化过程进行了仿真研究,测算了站台达到拥挤和安全极限时的客流容量,分析了不同客流到达率下站台达到拥挤和安全极限的时间分布以及服务水平变化曲线,并提出利用关键控制点对站台进行客流拥挤和安全分级预警的方法.
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