Research On Emergency Evacuation Path And Optimization Of Campus Buildings

Unreasonable campus emergency evacuation leads to frequent campus security incidents,and the problem of campus emergency evacuation has received great attention.Campus buildings have the characteristics of concentrated personnel,large flow of people and high utilization rate of buildings.In case of emergency,the personnel evacuation is not timely,which will cause a huge threat to the life and property of teachers and students.A safe and effective emergency evacuation path can guide people to evacuate and reduce casualties when an emergency occurs.Therefore,the research on the path problem of emergency evacuation of campus buildings can effectively improve evacuation efficiency and shorten evacuation time.Taking campus buildings as research objects,the definition and characteristics of campus emergency evacuation are summarized,and the existing problems in campus emergency evacuation are analyzed.The definition of campus buildings and their emergency evacuation characteristics are summarized,the emergency evacuation rules of campus buildings are elaborated,and the factors affecting personnel evacuation are clarified.On the basis of comparing the advantages and disadvantages of Dijkstra algorithm and other path planning algorithms,the dissertation makes clear the advantages of Dijkstra algorithm,and optimizes Dijkstra algorithm.Firstly,the multi-objective source points are set up so that the algorithm can plan paths to multiple target source points according to different nodes,which is more consistent with the actual situation of evacuation of campus buildings.Secondly,on the basis of considering relevant factors that affect evacuation path,the influence factor of road condition is introduced and converted into the influence of path weight by analyzing its influence on evacuation speed.Different influence factors of road condition are set to different values to optimize Dijkstra algorithm.Finally,taking a teaching building of a university as an example and taking the occurrence of fire accident as the background of emergency,after analyzing the characteristics of fire accident and the influencing factors of the personnel evacuation under the fire accident,the optimized Dijkstra algorithm was applied to evacuate people in the teaching building to verify the feasibility and effectiveness of the algorithm.The Dijkstra algorithm is optimized by setting up multi-objective source points and introducing road condition influence factors.The optimization algorithm of campus building emergency evacuation path is proposed.The evacuation path planned by the optimized algorithm can improve the personnel congestion during evacuation to a certain extent,shorten the evacuation time,improve the evacuation efficiency,and provide a reference for the emergency evacuation plan of campus buildings.Figure 17;Table 11;Reference 63...