Research on crowd dynamic risk management based on the psychological stress perception function

Number of people, density and so on are often used as a risk indicator in crowd dynamic risk management, but crowd size cannot truly reflect the change process of psychological stress perception that leads to crowd behavior disorder. Therefore, this research calculates risk index thresholds from the perspective of psychological stress perception to help managers assess crowd-gathering risks. On the one hand, the behavior model and psychological stress perception model are constructed based on corresponding experiments at the micro layer. On the other hand, risk decision models, including the average density and phubbers ratio, are built at the macro level. Finally, a long subway transfer channel was used as a simulation scenario, and the critical value of the decision quantity was determined by taking the psychological stress perception of the crowd as the objective function. The simulation shows that the perceived pressure of the crowd changes nonlinearly with time. The simulation result of the critical threshold can be divided into four zones, namely, the safety area, warning area, disposal area and dangerous area, so that managers can take targeted measures. The results are validated by applying psychological stress perception to practical population risk management.