Dynamic Simulation Study Of Crowd Evacuation Under Poison Gas Leakage

Large-scale evacuation of people in a toxic gas environment is a very complicated task,involving many factors such as the interaction between people and toxic gases,people and people,people and building structures.A large number of toxic and harmful gases will be released in a sudden gas leak event,which will have a great impact on the physiology and psychology of the personnel in the environment,cause psychological panic,reduce the behavioral capacity of the personnel,and then affect the personnel’s choice and decision on the evacuation route and People’s travel speed,etc.At present,people’s research on emergency evacuation mainly focuses on fire,while research on the evacuation of people under the leakage of toxic gas is seldom.In order to better understand the law of evacuation of people under the spread of poisonous gas,Firstly,we conduct a field survey of the evacuation psychological behavior of people under the leakage of poisonous gas,which can reflect the psychological state and evacuation behavior of the evacuees when the poisonous gas leaks.Secondly,the impacts of the gas concentration and the crowed evacuation time on people are considered,then,a dynamic model of the speed change of evacuees under the toxic gas leakage was established.Finally,based on the established dynamic model of the speed change under the toxic gas leakage,the entire model was simulated with Any Logic simulation software and the model was verified feasibility.The conclusions are as follows:(1)The investigation found that the psychological status of evacuation personnel was significantly related to age,emergency evacuation education,and emergency evacuation drills;the evacuation behavior of personnel was significantly related to gender,age,emergency evacuation education,and emergency evacuation drills.Therefore,the psychological state and evacuation behavior under the state of poison gas leakage are mainly related to gender,age,emergency evacuation education,and emergency evacuation drills.(2)Based on the toxic gas diffusion model and injury model,a dynamic model of the speed of evacuation of people under toxic gas leakage was established,and the dynamic process of evacuation speed of people under the toxic gas leakage was determined.(3)The simulation area was set,and the theoretical model established was simulated with Any Logic simulation software.The dynamic change of the average speed during the evacuation process with the diffusion of toxic gases was obtained.In the simulation process,the direction of people’s evacuation is set.In the end,people who choose to evacuate in the direction of the wind when they evacuate will have fewer casualties.