Citation

Li C, He H, Li Z, Zhang J. China Saf. Sci. J. 2020; 30(4): 86-92.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2020.04.014

PMID

unavailable

Abstract

In order to address the problem that people are greatly affected by real-time dynamic changes of smoke diffusion during evacuation, an improved cellular automaton model is developed to simulate personnel evacuation in smoke scenario. Firstly, change rules for evacuees' sight radius were proposed based on a dynamic parameter model to describe influence of smoke environment changes on their behaviors, and meanwhile movement rules of regional herd behaviors were established. Then, numerical simulation research on evacuation process in scenarios of single and double exits were conducted by using the model. Finally, impacts of visual field changes, herd behaviors and width of exits on evacuation in smoke scene were analyzed. The results show that herd behaviors have uncertainty on evacuation in some cases, and presence of guides can greatly improve evacuation efficiency. Changes of visual field have an impact on evacuation time, which is greater when number of evacuees is smaller. Increasing exit width can improve evacuation efficiency, but improvement is not obvious when the width reaches certain degree. © 2019 China Safety Science Journal

Language: zh