Optimized Design Of Door Protection Structure In Explosive Environment

As the international situation becomes more and more serious,vehicles are facing numerous explosion threats.As an important part of the occupants' living space,only the doors have good anti-explosion performance can the doors protect the passenger's life safety.Therefore,it is significant to optimize the design of the door protection structures.This paper takes a certain type of military vehicle as the research object,and analyzes the response and anti-explosion performance of the door protection structures in the explosion environment through the combination of theoretical analysis,finite element simulation and experimental research.The main methods are as follows:Firstly,the propagation law of explosives in soil and air is analyzed theoretically.The feasibility and accuracy of finite element analysis numerical simulation algorithm selection under different working conditions are verified by comparing the explosion test results of constrained square targets.After that,establishing an accurate finite element model of the doors,analyzing whether the dynamic and static performance of the doors meet the requirements,and at the same time determining the simplified research object and boundary conditions in the explosion analysis according to the characteristics of the working conditions,analyzing the structural response of the doors in the explosive environment,and finding the weak parts in the door design.Then,the design of door protection structures is carried out according to the weak parts,and the structures with the best protection performance are selected based on light weight.Finally,the multi-disciplinary and multi-objective optimization of the door protection structures are carried out,and the protection capability of each component is further exerted to improve the overall anti-explosion performance and energy absorption effect of the door structures.The results show that the optimized door protection structures can well limit the maximum intrusion and acceleration of the doors,improve anti-explosion performance and energy absorption of the doors,and protect the life of the occupants.The research methods and results of this paper have certain guiding significance in improving the door protection ability and light weight,and can provide some opinions and theoretical basis for the design of door protection structures and door lightweight research.