Rod Flow And Jet Conversion Studies

Through the analysis of the research development of multi-mode warhead, and based on the jet forming theory and detonation theory, the thesis studies the conversion between Jetting Projectile Charge and Jetting on single shaped charge with different detonation modes by using LS-DYNA simulation software and combining X-ray test, and the matching relations of shaped charge parameters which are suitable for conversion are obtained.The following are the main contents of this dissertation:(1) The influence of detonation wave on the penetrator formation under single point detonation and annular detonation was studied. The law of the detonation wave spreading and the law of the penetrator parameters with the change of detonation position are obtained. The detonation position which is conducive to conversion of two-mode is found, and the detonation position is 80mm-120mm, then analyze the differences between the theoretical values and simulation results.(2) Aimed the 100mm shaped charge, the calculation method of the liner overwhelm is proposed, the main parameters about penetrator forming was analyzed, the influence law of the shaped charge parameters (liner cone, radian radius, thickness and charge height) on the conversion of penetrator is studied, and the best matching relations of shaped charge parameters which achieves the conversion between JPC and JET are found.(3) By test, the influence of the liner parameters and the detonation position on the conversion of penetrator was studied, the test results of penetrator X-ray are consistent with the simulation results, the deviation of test data is less than 10%; with the initiation position from the top of the liner changing to the top of the charge, the head velocity of penetrator increases 14.6%, the length of penetrator increases 13%, and the regulation is the same with simulation result.