Research On Anti-explosion Performance Of Composite Structure Explosion-proof Tank

With the completion of the destruction base of the Japanese chemical weapons in Harbin,how to transport the Japanese chemical weapons has become a serious problem.The transportation of the Japanese chemical weapons may cause the leakage of toxic gas and the explosion of projectile,which poses a very serious threat to the city and transportation personnel.The main purpose of transporting Japanese chemical weapons is to develop the explosion-proof tank with light weight and good anti explosion performance.The appearance of new type explosion-proof tank with polymer composite structure lays a foundation for the research of light explosion-proof tank,which will greatly promote the engineering application of explosion-proof performance of explosion-proof tank with composite structure.In this paper,the honeycomb sandwich composite structure explosion-proof tank as the main research object,the maximum deformation of explosion-proof tank,the attenuation amplitude of shock wave by honeycomb sandwich and the absorption of energy by honeycomb sandwich are studied.Theoretical analysis,numerical simulation and experimental method are used to analyze the anti explosion performance of the explosion-proof tank with honeycomb sandwich structure.Among them,based on the principle of detonation physics,the propagation law of detonation wave in honeycomb sandwich is analyzed,and the energy absorption effect of honeycomb sandwich structure is studied,and the characteristics of fragments formed by the explosive driving of projectile(red bullet)are analyzed.In this paper,numerical simulation method is used to analyze the maximum shape variable and the attenuation of shock wave in the explosion-proof tank with honeycomb sandwich structure,The main contents of this paper include the following aspects:(1)The initial velocity of fragments,the theoretical analysis of honeycomb structure and the propagation law of detonation wave in explosion-proof tank are calculated.The energy absorption characteristics of composite target plate under explosion load are analyzed,the energy absorption model of interlayer of explosion-proof tank is established,and the unique energy absorption characteristics of honeycomb structure are studied.(2)Through the numerical simulation method,the wall thickness and the size ofeach layer of the explosion-proof tank are optimized.Through the comparison of the maximum deformation of the explosion-proof tank,the group with the smaller maximum deformation is obtained.According to the comprehensive effect of the explosion load on the explosion-proof tank,the final optimization design scheme is obtained,and the thickness matching is 10 mm-15 mm-15 mm.In order to prove the correctness of the simulation,the anti explosion experiment of single-layer 40 mm explosion-proof tank is carried out,and the maximum deformation is obtained through the experiment.Compared with the simulation results,the error is within 10%,which proves the correctness of the simulation.(3)Under the optimized thickness matching scheme,the sandwich structure is changed and simulated.The dynamic response under the same TNT equivalent is analyzed.The results show that the maximum shape of the explosion-proof tank with honeycomb sandwich structure is the smallest,the energy absorption effect is the best,and the attenuation amplitude of shock wave in the explosion-proof tank is the largest.(4)The damage effect of fragments on the inner wall of explosion-proof tank is studied by using simulation software.The results show that when the fragment velocity is less than 780 m / s,the damage effect of fragments on the honeycomb sandwich explosion-proof tank is less.