Citation

Xue S, Chen Q, Liu Y, Gong Z. China Saf. Sci. J. 2022; 32(11): 175-183.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.11.1201

PMID

unavailable

Abstract

In order to compensate the lack of understanding on children collective movement, especially the speed-density relationship and congestion risk of different age groups of children, a series of bidirectional flow experiments were conducted with 40 - 80 pre-school children in a kindergarten. The speed-density relationship of children from different age groups was analyzed based on Voronoi method. The CVS was introduced to depict the scatter characteristics of children walking speed and the results were compared with the adult experiments. Based on Voronoi neighborhood and social force model, the congestion risk of different age groups of children was also investigated. The results suggest that the walking speed of 5-6 years old group is the most scattered, with their average value of CVS being 1. 2 and 2. 2 times that of 3-4 years old group and 4-5 years old group, respectively. The CVS of all the three age groups of children are higher than that of adult experiments, with the CVS of 5-6 years old group being 2. 5 and 4. 7 times that of Chinese and Japanese adult experiments, respectively. In addition, the congestion risk of children group in the bidirectional flow is close to 27%-64% of that of adult group. © 2022 China Safety Science Journal. All rights reserved.

Language: zh