Study On Evacuation Of High-Speed Maglev Train Considering Height Impact

In the event of a fire or other emergency,the safe evacuation of passengers is one of the key issues that must be paid attention to during the development of maglev railway technology.Maglev lines are mostly laid in the form of viaducts,and their operating characteristics and evacuation conditions at high altitudes are significantly different from conventional railways.At present,the emergency rescue system of the maglev system is not mature yet.Therefore,this paper explores the safety evacuation of high-speed maglev train personnel,designs virtual experiments,establishes a high-speed maglev train evacuation network model,and performs simulation analysis to provide a reference for the maglev emergency evacuation system.This thesis firstly analyzes the characteristics of the evacuation modes of high-speed maglev trains,the psychological and behavioral factors of personnel evacuation,and then designs a virtual reality experiment that takes into account the fear of heights,and analyzes the pedestrian stride frequency,stride and speed,and fit function curves.Based on these studies,a high-speed maglev train evacuation network model will be established and simulation scenarios will be set up.Adjusting simulation parameters through experimental data,detailed study on the influence of scene height,fear of heights,evacuation platform size,fire location and other factors on the evacuation efficiency will be performed.Finally,three evacuation strategies are proposed based on the simulation results,and the optimal evacuation strategy is finally obtained.The main research contents are:(1)The operation characteristics of high-speed maglev trains require that the trains need to be parked in the assistant-stop area in an emergency.Accordingly,the horizontal and vertical evacuation methods of maglev trains are explained in detail,the evacuation psychological and behavioral characteristics of maglev train personnel are summarized,and factors affecting the evacuation efficiency are analyzed.(2)Virtual reality evacuation experiment scenarios with different walking height is designed and performed,using laser ranging radar to record the experimental data of the subjects.Fear of height assessment questionnaire and K-means clustering algorithm will be applied to investigate fear height influences.The walking height under the control of altitude and gender impact on evacuation speed,stride,stride frequency and heart rate will be studied.The results show that as the height of the experimental scene increases,the evacuation speed,stride,and stride frequency of pedestrian decrease,and the decline is significant within the range of 0m to 50 m.What’s more,one person who is more fear has a lower walking speed and stride,and a faster stride frequency under the same height.At the same time,this kind of person is more sensitive to the change of height.Female’s walking speed and stride decreased more observably than male’s.The walking speed and stride of male are larger than female’s at the same height,and the heart rate was higher than normal.(3)Dividing the evacuation platform into different evacuation zones,a high-speed maglev train evacuation network model in emergency situations is established and implemented.The model will be verified by comparing the simulation with a filed observation.By adjusting the model parameters,the evacuation scenario considering the fear height feature,the size of the evacuation platform,and the location of the fire is simulated.The results show that the higher the height of the scene,the more obvious the fear of heights,and the lower the evacuation efficiency.The proportion of passengers who are afraid of height increases from0% to 10%,and the evacuation time increases significantly,from 10% to 100%.The evacuation time is linearly related to the evacuation distance;the evacuation distance is linearly related to the evacuation time.Increasing the width of the evacuation platform can improve evacuation efficiency.When a train in the middle of a train catches fire,the evacuation efficiency of parking in the middle of the auxiliary parking zone is the highest.When the first and last trains catch fire,the evacuation efficiency of the evacuation stairs stopping on the opposite side of the train is the highest.(4)Three evacuation strategies,namely,compartmental evacuation,segmental evacuation and mixed evacuation will be simulated and analyzed.It can be found that the evacuation strategy based on the fractional compartments of cars is not effective;the evacuation strategy based on types can reduce the congestion of the evacuation platform area and improve the evacuation efficiency by a small margin;the mixed evacuation strategy combines the advantages of horizontal evacuation and vertical evacuation.Different types of passengers are diverted,which greatly improves evacuation efficiency.