Evacuation Route Planning for Semi-submersible Platform under Fire

Abstract

The selection of evacuation routes plays a significant role in evacuation efficiency under emergency fire conditions. In order to plan a reasonable evacuation scheme and decrease casualties when the semi-submersible platform suffers a fire, a designated evacuation scheme under fire is introduced. A seven-story semi-submersible platform is taken for example to quantify the impact of evacuation route choice, and fire diffusion parameters are imported to the evacuation model. Firstly, crew selects the evacuation route to evacuate to the assembling station independently under fire in case 1. Secondly, based on the evaluation results obtained from case 1 and the real-time perception of fire information, a prescribed evacuation scheme is employed in case 2. Simulation results acquired from these two cases are analyzed and compared from three aspects: evacuation time, utilization rate of exits and congestion, which show that the altered evacuation route in case 2 can help crew avoid the expanding fire and congested route effectively, so evacuation time is reduced and evacuation efficiency is improved. Moreover, by adjusting the evacuation route, the utilization rate of exits is improved as well. This research can contribute to the formulation of emergency plans and the design of evacuation routes when the semi-submersible platform suffers fire.