Simulation Research On Crowd Evacuation Under The New Systematic Thinking Framework

The process of evacuation is a complex nonlinear physical process,so it is difficult for the conventional reductionism method to interpret the evacuation in essence.For this reason,by transforming the paradigm of thinking and citing the concept of systematic thinking,this paper considers the evacuation process of the crowd in the indoor public places as the evolution of complex systems.Based on the model of improved cellular automata,simulation research the influence of different factors on the evolution trend of evacuation system by capturing the main line of input and output relationship change of evacuation system.The main work of this paper is as follows:1? The new systematic thinking believe that complex system evolved constantly under the influence of three general factors: input,system structure and system boundary conditions,and system evolution studies should be based on input and output relationships.According to the experiments of the reactor,the system thinking method is verified,and it is feasible to study the evacuation simulation under the guidance of the new systematic thinking through analyzing the characteristic of evacuation2?The construction of evacuation simulation model takes two aspects into account,On the one hand,it is established a pedestrian route selection strategy,which not only determines the influence of the static and field effects in the classical cellular automata model,but also the influence of the neighbors' interaction affected by the regional population density;On the other hand,it is the effect of frictional force and repulsive force on the pedestrian's ability to act.3?The input contains three factors: material,energy and information,and the pedestrian in the material input is a complex,which is composed of multiple input sub-factors.It is found that evacuation time improve with the increase of density.4?Boundaries contain evacuation space cont ours,exports and other factors.It is found that with the increase of export width,the evolution rate of evacuation system is increased,but the influence of export width on evolution rate is decreased;The more balanced export settings are,the more condu cive to accelerating the evolution of evacuation systems.5?The structure includes evacuation crowd structure and evacuation of space structure and many other factors.It is found that the proportion of vulnerable groups significantly delayed the overall evacuation time of the population,and it is beneficial to pedestrians to escape if the exit area obstacle is perpendicular to the exit,however,the evacuation rate will decrease if the obstacle which is parallel to the exit plane is too long.6?To reflect the evacuation when perception is limited,the variable evacuation model has been established.It is found that the time required for the evolution of the evacuation system will decrease with the increase of perceived distance or the improvement of environmental familiarity,but the rate will decrease.