More passengers would be able to be transported to their destinations when boarding and alighting time of subways in rush hours is reduced and the efficiency of the system will be increased as well.Currently,most of the stud-ies on boarding and alighting behaviors of passengers are carried out based on the hypothesis that all the passengers on a train would get off,which is not the case for most boarding/alighting stations.In the present study,the scenario that only a part of passengers get off the train is investigated through a social force model.In combination with a waiting model,the remaining passengers are assumed to stay at their original position.The proportion and distributions of alighting passen-gers,ratio of boarding/alighting passengers as well as the influence of door width on the boarding/alighting time are sim-ulated and analyzed.The results show that boarding/alighting time of passengers decreases by 39.62% and 39.7% at most respectively when door width increases by 23.08%.With an increase of the ratio of boarding/alighting passengers,the av-erage boarding time tend to decrease while alighting time increases.Alighting time can be reduced to 72.16% when the lo-cations of alighting passengers are optimized.%在上下班高峰期,缩短乘客的上下车时间,更多乘客将会被送达目的地,从而可以提高现有地铁系统的载客能力.现有的国内外研究乘客上下车行为的文献,大多以全部乘客下车为前提进行研究,这与现实生活中只有部分乘客下车的现象不符.因此在社会力模型的基础上加入规定未下车乘客行为的等待模型,在等待模型中,未下车乘客倾向于停留在初始位置.模拟了部分乘客下车行为,并研究了乘客初始位置分布、上下车乘客比例、门的宽度等因素对部分上下车乘客所需上下车时间的影响.结果表明,车门宽度增加23.08%,最多可节约39.7%的上车时间和39.62%的下车时间;随着上下车人数比例不断上升,平均上车时间不断下降,平均下车时间不断上升;通过改变下车乘客初始分布位置,可以将乘客下车时间缩短至原来的72.16%.
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