Experiment Research And Numerical Simulation On Terminal Effect Of Anti-Runway Tandem Following Bullet

Many kinds of penetration weapon have been new pattern weapon which played important role that can't be taken placed of in modern war. Because of its special features, the tandem following warhead has been an important development direction in penetration warhead all over the world, and has been an effective means of anti-runway and other underground tactical and strategical target. Experiment research and numerical simulation on terminal effect of anti-runway tandem following warhead will benefit to warhead design.Focusing on the terminal effect of anti-runway tandem following warhead, this paper presents some progress in developing new dynamic constitutive model of metal and concrete and in simulating on the above dynamic problem. The main research results obtained can be summarized as:(1) A new metal constitutive model coupled with EOS, was independently developed. It is suitable for describing the interaction of metal and detonation wave, which is a multi-scale physical problem in numerical simulation. The newly developed model established a relation between the macrocosmic and sub-macrocosmic even microcosmic phenomena. The UMAT subroutine of the model was coded into LS-DYNA, a 3D dynamic FE code. The newly developed model has been evaluated in simulating the dynamic response of metal components in tandem following warhead.(2) A new concrete constitutive model, dynamic stochastic continuum damage model, was independently developed. It is suitable for describing concrete under large deformation, high strain rate, high pressure loading. The model was coded into LS-DYNA, a 3D DYNAmic FE code. The new model has advantage for categoricalness in consideration the damage, including tension and compression, strain-rate-dependence, and failure mode. Also given is the practical method of determing of the material constant of RDCDMC. The new developed model has been evaluated in simulating the dynamic response of concrete penetrated by tandem following warhead.(3) We have analyzed the experiment method and measurement of jet forming penetrating the multi-layer concrete target, and carried out a series of experiment research. The results of experiments can be used to verify the results of our numerical simulation.(4) According to the technology target of the warhead, we have established a model and simulated the process of jet formation and penetration into the multi-layer concrete target, and analyzed the factors that affect the performance of the tandem following warhead.(5) Appropriate calculation model and method were applied in continuous numerical simulation of the first jet cabin and the following bullet of tandem following warhead penetrating into multi-layer concrete target. The result of numerical simulation under several conditions showed that the damage profile of the concrete target penetrated by the following bullet and the metal jet.(6) Appropriate material model was applied in numerical simulation to describe the different response of material under different dynamic loading. Also selected is the appropriate formulation or method according to different physical problem, with the dynamic phenomena rendered detailedly and furthest.These research results can provide some important theoretical reference in the engineer analysis, numerical simulation, warhead design and experiment technology of anti-runway tandem following warhead penetration and destroy effect, and can save much manpower, material resources, and improve efficiency.