Research On The Theory And Visualization Of The Evacuation Simulation

Nowadays, building becomes having huger structure and more complex layout. The evacuation problems, such as huge crowd flow will be the main problems the engineers face. So simulation on evacuation becomes an important method in safety design.The fire evacuation is a problem with three factors, the evacuee, structure and the fire. All these factors influence with each other. But no perfect one has been brought out. Moreover, human behavior is another difficult factor to be simulated on. Many researches show that it is always the most important study field. Because of the theory and technique limits, traditional simulation models are concentrated on 2Ds and numerical analysis which can hardly display the real state of the fire place and the people.To solve those problems described above, a new model established, which is named Geometric Evacuation Model, and many further researches about this model also carry out:1. Two common methods, gird method and topology method are analyzed and topology method is applied. The building plan is extracted into a network which comprises many nodes, and every node denotes a subspace. All geometric information is saved in subspace node.2. The relation between planar drawing and 3D geometry is explored. By standardizing the drawings and construct the relations, the real-time function of constructing a 3D scene is accomplished, and according to the 3D Animation and particle system theories, An 3D person model and an simulation of fire and smoke are created.3. Principles of the Animation are introduced, the relation between the user and the simulation system is constructed, and the interaction between and the users is created.4. A three-dimension simulation system is developed, which can be used in safety education and evacuation training.