Research On The Integrated Design Technology Of Structural Materials For The Bottom Protection Components Of A Certain Type Of Armored Vehicle

In recent years,military vehicles are often threatened by roadside bombs,improvised explosive devices,mines and other explosives.The high-speed impact caused by the explosion of military vehicles is devastating to vehicles and passengers.At present,the main way to improve the anti explosion performance of vehicles is to install bottom protection components,but the installation of components will affect the basic driving performance of vehicles,so it is necessary to reduce the mass of components while meeting the anti explosion impact performance.Although the lightweight design of protective components is the research trend in the field of explosion protection of military vehicles,the research on the integrated design method of protective component materials and structures based on explosion environment is less.In this paper,a design idea of protective components considering the anti explosion and impact performance of protective components is proposed,which can better deal with the multi-objective optimization design problem of the structure and material matching of protective components.First of all,according to the bench test of a protective component,the simulation analysis and test verification are carried out,and the accurate simulation model of shallow explosion is obtained.Then,according to the design requirements of the bottom protection component of a certain vehicle,the component structure design is carried out based on the design idea of sandwich structure,and the anti explosion and impact performance of different structural forms of core structure are compared and analyzed,the optimal core structure layout is obtained,and the design of the protection component platform structure is completed.Then,aiming at the design of the platform protection components,considering the requirements of anti explosive impact performance and lightweight of the components in the design,the integrated design goal of material structure is proposed,and the component structure that affects the anti explosive impact performance is selected as the design variable;Based on the Latin super elevation method,the sensitivity relationship between variables and targets is obtained;Based on the experimental design results,four kinds of agent models are constructed,and the fitting degree and error of the agent models constructed under different algorithms are compared.The optimal agent model is obtained as the optimization object,and the optimal agent model is calculated based on three kinds of multi-objective optimization algorithms,the comprehensive optimal solution with the smallest error is obtained,and the simulation and optimization accuracy are verified by bench test.Finally,on the basis of obtaining the accurate finite element model of an armored vehicle,the protection component design based on the whole vehicle is carried out,the agent model is constructed by Kriging method,and the Pareto solution set satisfying the design objective is obtained by NSGA-II multi-objective genetic algorithm,and the comprehensive optimal solution under the requirements of multi-objective optimal design is obtained by the minimum distance method.In the end,the optimized protective components have some improvement in quality and protective performance,achieving the goal of material structure integration design,which improves the anti explosion impact performance and reduces the quality of protective components.