Analysis Of Explosion-proof Performance Of Underground Station With Explosion-proof Hanging Plate

In recent years,terrorist bombing attacks have occurred from time to time,especially those targeting subway stations.Due to the closed environment and densely populated subway stations,once a sudden explosion accident occurs,it is easy to cause a strong subway structure.The dynamic response of the company has even caused serious damage or even collapse,which seriously threatens the safety of the public’s lives and property.In order to reduce the explosion impact load to the subway structure damage,this paper analyzes the explosion-proof structure of the underground station with explosion-proof siding,and analyzes the explosion-proof performance of the explosion-proof siding.This paper uses LS-DYNA software and fluid-structure coupling algorithm to analyze the force of the structure of the underground station,analyze the force of different positions of the subway,and then use the explosion-proof hanging plate to analyze and compare the anti-explosive performance of the structure.The weakening of the impact load of the explosion achieves the protection of the reinforced concrete structure of the subway station.It also analyzed and compared the explosion-proof performance of explosion-proof panels made of different materials,determined the optimal explosion-proof material,and further explored the influence of material parameters on explosion-proof performance,so as to optimize the design of explosion-proof and explosion-reduction measures.The main research work And the research results are as follows:(1)Establish a partial three-dimensional model of the subway station,simulate the air flow field when a 20 kg equivalent TNT explosive explodes in the center of the subway station,analyze the propagation path of the explosion shock wave,the explosion overpressure and the attenuation law,and study the steel bars at different locations in the subway station The force characteristics of the concrete structure and the dynamic response of the overall structure provide data basis for further analysis.(2)In order to accurately simulate the damage of the explosion impact load to the structure,a part of the structure close to the explosion source is selected as the research object,and the weakening effect of the explosion-proof hanging plate on the explosion impact load is analyzed,and the concrete material and the foamed aluminum material and The explosion-proof effect of steel plate and aluminum alloy plate,determine the combination of aluminum alloy plate as the external material and foam aluminum plate as the sandwich material,and analyze the explosion-proof effect of the explosion-proof hanging plate under different TNT equivalents,and explore the damage and deformation characteristics of the explosion-proof hanging plate.(3)Firstly,explore the energy absorption capacity of the explosion-proof hanging plate composed of aluminum alloy plate and aluminum foam material under explosive impact load,and make a comparative analysis,and then explore the explosion-proof effect of aluminum alloy plates and foam aluminum plates of different thicknesses through parameter analysis It is determined that the thinner aluminum alloy plate and the thicker aluminum foam plate have greater plastic deformation for the explosion-proof hanging plate structure,thereby absorbing more capacity and achieving better explosion-proof effects.The optimal arrangement of explosion-proof hanging panels is determined.