| It is the enclosed structure and high-dense people of crowded places, such as gymnasium, subway, shopping mall and chemical district that increase the difficulty of analysis their influence on the evacuation. Moreover, the disaster accidents have the characters of sudden, dramatic and frequency. Therefore, it is great significant to build the reasonable and effective strategies to reduce casualties during emergency evacuation. The dynamically configurable scenario and effective evacuation algorithm are studied in this thesis. In addition, crowd evacuation in emergency is simulated using OGRE. This thesis is focusing on the following aspects,Establish configurable scenario dynamically. On one hand, the establishment of scenario elements library allows users to interactively build the simulation scenarios. On the other hand, the crowd evacuation is simulated in user-defined scenario to evacuate the efficiency of algorithm in different scenarios. By this means, the scene layout is optimized.Analyze retrospectively of the accident scenario. In order to assist emergency command, the retrospective of dynamically configurable scenario is studied. Through recording the main information of emergency,3D accident scenario can be playback using OGRE. Therefore, the retrospective analysis is completed.Multi-objective decision algorithm is proposed. First, by pre-detecting collision during crowd evacuation, the redirecting strategy is proposed. Second, by introducing the evacuation decision factor and the nearest exit selection model, the crowd evacuation is optimized, and multi-objective decision function is established. Finally, the target decision is simulated using OGRE engine in emergency evacuation, and then the crowd evacuation strategies are made.Therefore, with dynamically configurable scenario, retrospective analysis and multi-objective decision making, the foundation commands for scientific and efficient emergency, the auxiliary emergency evacuation and venue construction are provided. |
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