Research On Dynamic Role Modeling And Building Safety Assessment For Self-organizing Crowd

In recent years,there have been more and more casualties due to crowd gatherings.In the face of unknown dangers,the use of crowd simulation technology to simulate and evaluate the self-organized crowd in advance can detect problems in time and prevent microscopic and gradual progress.However,most of the existing crowd simulation methods do not pay attention to the dynamic characteristics of the crowd and the rationality of indoor layout.This paper establishes a pedestrian leadership model based on the classical OCEAN personality parameters,clearly distinguishes the roles of leaders and followers in the crowd,and proposes a dynamic leader role model(DLRM)to describe the relationship between leaders and followers.In the simulation scenario,this paper proposes an indoor building evaluation method to evaluate the safety of buildings and optimize them reasonably.Experiments show that the dynamic role modeling and building safety assessment method for self-organizing crowds proposed in this paper can effectively improve the efficiency of crowd evacuation.1)Dynamic role modeling for self-organizing crowds.In the dynamic role crowd simulation problem,this paper establishes the pedestrian leadership ability model based on the classical OCEAN personality parameters.Then,by considering the interactions among pedestrians during evacuation,a Dynamic Leader Role Model(DLRM)is proposed to describe the dynamic relationship between leaders and followers.Finally,on the basis of the above DLRM,a new crowd simulation algorithm is proposed using the extended social force model.Experiments in several typical scenarios verify that our proposed simulation model has good authenticity.2)Research on building safety assessment for self-organized people.In the problem of indoor building safety assessment,this paper combines the indoor space abstraction method of Indoor GML to achieve a reasonable abstraction of the indoor horizontal plane structure and vertical hierarchical structure.Then,through the analysis of the danger threshold and traffic rate of each route,a safe route selection algorithm is proposed.Then,this paper analyzes the key nodes of a single escape path,a single exit key node and a cross-floor escape route,and finds out the unreasonable nodes of indoor buildings and optimizes them.The effectiveness of our evaluation algorithm is proved by simulation experiments in simulated scenarios.3)Dynamic role modeling and building safety assessment simulation system for self-organizing crowd.In order to facilitate users to analyze multiple scenarios,this paper designs and implements an indoor safety assessment system based on role behavior modeling.We model multiple scenarios such as large shopping malls and subway stations,and the system integrates heat maps,trajectory maps,single-person tracking,and multiple dangerous placement functions to simulate real dangerous situations to the greatest extent.In addition,simulation experiments with multiple simulated scenarios confirm the practicability of the system.