Subway Fire Risk Assessment Based On FPN Model And FAHP

With the rapid development of economy,the number of cars is increasing,and traffic congestion is becoming more and more serious.Many "traffic jams" appear one after another.In order to alleviate the pressure of urban traffic,subway,a new type of transportation mode,emerges as the times require and undertakes a large number of passengers.However,due to the dense population,most of the stations are underground.In case of fire,evacuation and rescue are very difficult.Therefore,the study of fire risk assessment for subway stations is of great significance for subway management and fire control.Through the analysis of subway fire risk factors,this paper constructs a reasonable and effective risk assessment index system.Based on the fuzzy characteristics of subway fire risk assessment,FAHP and FPN are effectively combined to study the Qingdao subway line 3,and static analysis of the subway station fire risk is carried out.Dynamic simulation evaluation and corresponding control measures are put forward.(1)By referring to the relevant literature and the laws and regulations of subway fire protection,and analyzing the characteristics of subway fire,the evaluation index system of subway fire risk is constructed from four aspects of human,equipment,environment and management,and the evaluation indexes are optimized by expert investigation method and grey statistics method in grey system theory.It makes the evaluation index comprehensive and universal,and provides a reference for the management and inspection of subway administrators.(2)Combining the fuzzy Petri net theory with the risk evaluation index system,a subway fire risk assessment model based on fuzzy Petri net is constructed,which is suitable for the risk assessment of ordinary subway.FAHP evaluation method is constructed based on the advantages of AHP which can reasonably stratify the evaluation indexes and the mathematical operation of fuzzy synthesis method.This paper analyzes the fire risk of the Wusi Square subway station of Qingdao Metro Line 3 and obtains the risk evaluation index system suitable for the subway station.The dynamic evolution of the fire accident is obtained by the simulation of the fuzzy Petri net model.The influence process of the initial storehouse on the intermediate storehouse and the target storehouse is represented graphically.The risk grade,dynamic graphic representation and numerical analysis results of the subway station fire can be obtained by the physical calculation,and the risk factors can be obtained,which provides a reliable basis for subway risk management.On the basis of the newly established fire risk evaluation index of the Wusi Square subway station,the fuzzy analytic hierarchy process(FAHP)is used to analyze the fire risk of the subway station,and the weight of each evaluation index is obtained by the AHP.Then the comprehensive evaluation method is used to calculate the fire risk,and the static numerical analysis is used to analyze the subway station.Through the evaluation results of the two methods,the corresponding emergency prevention and control measures are put forward from four aspects of human,equipment,environment and management.