垂直升船机初期火灾疏散路径人群流量分配研究?

为合理分配垂直各疏散路径的人群流量,通过分析垂直升船机的结构特征,确定升船机综合使用电梯与楼梯进行垂直疏散的可行路径,分别计算从电梯向最近出口疏散、经楼梯向上游平台疏散、经楼梯向下游平台疏散等三条路径上的疏散时间,取三者较大值作为升船机垂直疏散时间,并以此时间最小化为目标函数,运用粒子群算法,仿真求解使用楼梯比例及向上游平台疏散比例等流量分配系数。结果表明:停靠高程∈62,128]m时,楼梯使用比例可适当增大,使用楼梯向上游疏散比例为0;停靠高程∈128,147]m时,楼梯使用比例可进一步增大;停靠高程∈147,175]m时,楼梯使用比例可适当减小,使用楼梯向上游疏散比例为1,经流量分配后疏散时间被有效缩短。

Crowd Flow Distribution of Evacuation Path for Vertical Ship Lift on Initial Fire

This paper aims to distribute the crowd flow of vertical evacuation paths reasonably.Firstly,the structure and evacuation channel of the vertical ship lift are analyzed to identity the feasible path of vertical evacuation by using elevators and stairs.Subsequently,the evacuation time from elevators to nearest exits,from stairs to upstream platforms,and from stairs to downstream platforms is calculated,respectively,to determine the vertical evacuation time.Finally,the shortest vertical evacuation time is taken as the target to obtain the optimal crowd flow distribution coefficient based on particle swarm optimization(PSO).The results show that when the elevation is between 62 m and 128 m,the proportion of stairs can be increased appropriately,and the proportion of staircases to upstream is 0.When the elevation is between 128 m and 147 m,the proportion of stairs can be further increased.When the elevation is between 147 m and 175 m,the proportion of stairs can be reduced appropriately,and the proportion of staircases to upstream is 1.In this case,the evacuation time is effectively shortened after flow distribution.