The Simulation Analysis Of The Velocity Of Pre-formed Fragments

The pre-fragments warhead in the detonation process, produces the high temperature high pressure detonation product at the same time broken piece to obtain certain initial velocity to disperse, fragments initial velocity and scattering direction angle are weigh the warhead performance two key parameters. Because the warhead detonation is a very complex physical and the chemical change process, uses the theoretical analysis the method to be difficult, if through experimental method, not only the design cycle is long, moreover the cost is high. At present along with computer technology development, numerical simulation into warhead design important means that in view of this, this article separately controlled the pre-fragments warhead to the tungsten block type controlled fragment warhead and the chamfer type to carry on the numerical simulation and the might analysis in advance.Uses three dimensional ANSYS/LS-DYNA finite element software to use projectile nose,projectile Central and projectile tail of the pre-fragments warhead three kind of detonation way analysis separately to the tungsten block type pre-fragments warhead, the numerical simulation result indicated that when central detonation obtains the broken piece speed is biggest, the fragmentation effect is best. Shoots the forehead detonation to the broken piece speed which forms the ball rear part detonation be bigger. Controls the pre-fragments warhead to the chamfer type to use the overall chamfer and the simple ring chamfer two kinds of plans in advance, the analogue result indicated that the simple ring chamfer explodes the broken piece which forms to the overall chamfer effect be better. And unifies the theory confirmation and the range testing contrast, the numerical simulation result indicated that in the normal choose material and so on related parameter and the model simplify in the reasonable situation, in the like product improvement and the new product triturating, the available numerical simulation replaces the part experiment, saves the massive financial resource, the physical resource and the manpower and so on.