Research On Optimization Of Emergency Passenger Evacuation Guidance In Urban Rail Transit Station

As the concept of public transportation has been deeply rooted in the hearts of the people,rail transit,as an important part of urban public transportation,plays an increasingly significant role in conveying large passenger flow.With the continuous improvement of urban rail transit network,the structure of large-scale semi closed rail transit station is becoming more and more complex and the passenger flow is increasing.When the emergency passenger evacuation occurs,the complex structure and huge evacuation passenger flow make the passenger evacuation in rail transit station face a severe test.Therefore,how to safely and efficiently evacuate the emergency passenger flow in rail transit station is the focus of this paper.Combined with the research status and related theories of Evacuation Optimization in complex places at home and abroad,the evacuation characteristics are analyzed from two aspects of evacuation path selection and evacuation popularity.Based on the analysis of the characteristics of passenger flow evacuation in different types of transfer stations,the research object is determined as the emergency passenger flow evacuation in "double island and four line" transfer stations.Combined with the applicability,advantages and disadvantages of the existing pedestrian evacuation space modeling methods in complex places,the network method is used to model the complex evacuation space in rail transit station.Based on the analysis of the applicability of the evacuation route allocation method in rail transit station,a passenger flow route allocation model considering the incomplete decision information of passenger evacuation route is established.At the same time,the process of passenger evacuation route adjustment based on guide is analyzed and modeled.Considering the influence of guide function and guide compliance rate on the behavior of passenger evacuation route selection,an information response model is established to describe the process of passenger evacuation route adjustment under guide function.Then the evacuation optimization model based on the location layout of the guide is established.Among them,the upper model takes the minimum of the weighted sum of the mean and standard deviation of the evacuation time to describe the stability of the evacuation system and the evacuation efficiency as the optimization objectives,and the lower model is the passenger flow allocation model guided by evacuation.The second generation non dominated sorting genetic algorithm is designed to solve the multi-objective optimization model.Taking the "double island and four line" transfer station in a large business district of a first tier city as an example,the evacuation network structure diagram is constructed by using the network method.This paper uses the bi level programming model based on the location layout of the guide to study the Evacuation Optimization of the emergency passenger flow of the transfer station,and uses the anylogic micro simulation software to simulate and analyze the evacuation effect before and after the optimization,so as to verify the effectiveness of the evacuation optimization method and emergency strategy proposed in this paper.The results show that the location layout of the guide has a great impact on the choice of the passenger evacuation path and the evacuation efficiency of the system.Compared with no evacuation guidance strategy,the optimal evacuation guidance strategy has certain advantages in the evacuation time and the utilization rate of the passenger evacuation path.