Heterogeneous Explosives Experimentally Investigated And Analyzed By Lagrange Analysis Method In Two Demsions Production Process

The process of explosive's shock initiation and extinguishment was experimentally investigated , analyzed by Lagrange analysis method and simulated by the ls-dyna procedure in this paper. The results from the numerical simulation and the experiment are concordance. The bridge of the experiment and the numercial simulation has been established by the Lagrange analysis method . The works below have been carried out.The advanced sensors in two dimensions are used in the experiment. The Lagrange experiment method in two dimensions is in fact a partition assay experiment. When the process of shocking initiation or extinguishment is recorded by the sensors of two dimensions ,the shorage is overcoved contrasted to Lagrange experiment method in one dimension.The process of explosive's (wrapped coarse granule TNT) shock initiation and extinguishment was analyzed by Lagrange analysis method in the case of small partition assay. The state equations of explosive and reaction products are all based on JWL state equations. The value-time relations of u,v,e on every Lagrange position are obtained and the parameters in the reaction rate equation have been determined, which utilizies the ignition and growth model. The parameters determined can be derctly used to ls-dyna procedure, From which the bridge of the experiment and the numercial simulation has been established .The process of shock initiation is simulated in the ls-dyna procedure with the parameters of the reaction rate equation determined .The results are uniform to the results of the experiment.A research technique of shock initiation has been established.