Evacuation from offshore platform based on multi-velocity cellular automata
Jin GAO1,2(),Jing-hai GONG1,2,*(),Jun HE1,2
1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China 2. Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure, Shanghai Jiao Tong University, Shanghai 200240, China
A cellular automaton-based system that is suitable for the evacuation from offshore platform was developed and a method to incorporate the variation of velocity in discrete model was proposed, in order to explore pedestrian evacuation dynamics on offshore platform and evaluate evacuation efficiency quantitatively. Model parameters were calibrated based on experiment results on real platform, and the feasibility of the simulation system was verified by comparing with maritimeEXODUS. Evacuation results in smoke-free and smoke scenarios on the platform were quantitatively analyzed and compared from evacuation time and exit efficiency, and an optimized evacuation plan was further proposed. Results show that the smoke environment not only reduces individual speed and extends evacuation time, but also affects personal route choice, inducing the imbalanced evacuation.
Jin GAO,Jing-hai GONG,Jun HE. Evacuation from offshore platform based on multi-velocity cellular automata. Journal of ZheJiang University (Engineering Science), 2021, 55(9): 1764-1771.
Fig.1Moving probability in cellular automata model
Fig.2Updating rules and steps in evacuation model
Fig.3Layout of each deck and distribution of pedestrians
Fig.4Snapshot of evacuation process on offshore platform
场景
V1
V2
V3
V4
1
1.78
1.58
1.42
1.97
2
1.34
1.95
1.61
2.19
Tab.1Statistics of average evacuation velocity (m·s−1)
Fig.5Evacuation route in different scenarios
疏散场景
T/s
TE/s
TM/s
场景1
80
84
86
场景2
88
90
91
Tab.2Comparison of evacuation time between simulation system and experiment, maritimeEXODUS software
Fig.6Relationship between number of evacuees on each deck and evacuation time
Fig.7Relationship between number of evacuees and evacuation time of each exit
Fig.8Relationship between number of evacuees on each deck and evacuation time
Fig.9Relationship between number of evacuees and evacuation time of each exit
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