| As the protection of high-value hard targets continues to increase,it will be characterized by increasing strength of the material and increasing thickness of the structure.As a result,the weight of the penetrator round(also known as a drilled round)will be greatly increased,the material will be greatly strengthened,and at the same time its speed of entry into the target will be greatly increased.Therefore,in this extreme overload environment,the study of the Projectile-fuze System is a very prominent and critical issue.Therefore,in this paper,the study of the parameters of the intrinsic model of high-strength concrete and the dynamic characteristics of the high-strength concrete penetrated by the high-speed ballistic system are carried out by combining numerical simulation and experimental research.The main research contents of this paper are as follows:In this paper,quasi-static compression test,triaxial compression test and Hopkinson compression bar test were firstly carried out on the concrete material to obtain the static property parameters of the material under the proposed static load and the stress-strain curves under different working conditions and the dynamic mechanical property parameters and the corresponding stress-strain curves under different strain rates.Then,the quasi-static compressive properties,dynamic compressive properties and damage mechanisms of concrete materials were discussed in conjunction with the damage morphology of the specimens.Next,the parameters of the HJC intrinsic model of high-strength concrete are investigated.Firstly,the HJC intrinsic model parameters of high-strength concrete are obtained by the experimental determination method of HJC model parameters.On this basis,the impact compression test of Hopkinson compression bar is numerically simulated by using finite element simulation software,and the numerical simulation results of Hopkinson compression bar are justified with the Hopkinson compression bar test results of concrete under different impact air pressure.Finally,the structure of the Projectile-fuze System is designed,and the numerical simulation of the Projectile-fuze System is investigated in the finite element simulation software for the intrusion of the ten-layer spaced concrete target plate under different initial velocities,angle of impact,strength,and angle of attack of the concrete target plate.And to explore with the change of these initial conditions,the change of projectile velocity,projectile axis deflection angle,overload and acceleration sensor and board stress cloud change law. |
