Experimental And Simulated Study Of Pedestrian Evacuation Behavior In A Room Under Invisible Condition

With the continuous urban expansion,the crowd aggregation phenomenon has become a common problem in modern society.Once the crowd in an emergency of loss of power accident,dust and other unexpected situations,the scene of the accident has become more complex,these complex site conditions will prevent people quickly evacuate from the scene of the accident.If the area suffered sudden power outages or fire smoke,people want to escape from the area,how to quickly escape from the invisible environment?what strategies can help people quickly escape?It is a key problem that is worthy of our next research.During the last decades,pedestrian evacuation has become a hot research topic of many researchers,public safety issues related to people's livelihood have attracted much attention.The evacuation process from a room under invisible condition is investigated by both experiment and modeling.Firstly,the evacuation of the disoriented students from the room is observed by video cameras,and the evacuation trajectory and escape time of each pedestrian is measured.Then,using the social force model to simulate the pedestrian evacuation behavior,compared the simulated data with experimental data.The social force model proposed in this paper can simulate the real environment of pedestrian evacuation behavior under invisible condition.The simulation data and experimental data can agree well.The main contributions in this paper are listed as follows.Part one,we expounded the background and significance of pedestrian evacuation research under invisible condition.For the present domestic and foreign research achievements of pedestrian evacuation,we reviewed evacuation behavior,the evacuation simulation model and evacuation strategy in three aspects.Part two,we summarized the pedestrian evacuation process of some typical self-organization phenomena.Then the previous literature is related to the invisible environment and crowded on the pedestrian evacuation model were analyzed and summarized.And we elaborated the pedestrian evacuation characteristics and some influencing factors of pedestrian evacuation.Finally,experiment design and experiment process,pedestrian data acquisition method and pedestrian data processing methods of three parts were summarized.Part three,we studied the invisible environment of pedestrian evacuation behavior.First of all,the pedestrian evacuation behavior under invisible environment was studied by simulating and evacuation experiments,starting with six experimental schemes,such as the number of pedestrians,the width and the number of exit,the initial distribution of pedestrians,leadership effect and whether the pedestrian communicate with each other.Secondly,the social force model is used to simulate the simulation.We selected the appropriate and accurate parameters,and to verified the model.We found that the model can reproduce the real scene situation.Finally,the simulation results and experimental data were analyzed,and we put forward some strategies that can improve the evacuation efficiency effectively.