摘要
为了准确预测商场人员疏散时间,文中结合群集流动规律及离散法建立新的大面积网格算法,将时间离散为微小单元Δt,空间离散为大面积网格,利用人员流动速度—密度公式,计算每一Δt时间内网格中人员流动速度,迭代累计各单元时间得到疏散时间。以某商场人员疏散演练为例进行分析,结果表明,大面积网格算法预测的人员疏散时间与实际疏散演习时间基本吻合,其相对误差为3.4%,预测精确度较高。
In order to accurately predict the mall evacuation time, in this paper, a new large-scale grid method was established based on the cluster flow law and discrete method. The method distracts the time into units At and divides the space into large- scale grids. By using mobility rate-density formula, the grid mobility speed in At time is calculated. Thus, the evacuation time is obtained by using iterative method with cumulation of the time of all units. By taking a mall evacuation drills for example, the results showed that the time of evacuation drills predicted by the large-scale grid model agrees well with actual evacuation time, with relative error of 3.4%.
出处
《火灾科学》
CAS
CSCD
北大核心
2017年第1期43-48,共6页
Fire Safety Science
基金
辽宁省高等学校杰出青年学者成长计划基金项目(LJQ2011028)
