Research On Key Technologies Of Rod/fragment Dual-mode Switchable Warhead

Multi-target attack capability is an important trend for missile development.The multi-mode warhead can automatically select the most appropriate strike mode based on the target information,which is an effective way to achieve multi-target attacks.A kind of rod/fragment dual-mode warhead based on the detonation wave superposition effect was proposed in this paper,which can produce two kinds of kill elements,such as rods and fragments.The dual-mode warhead is able to attack both aircraft and missile targets.First of all,the structure and kill element formation mechanism of the rod/fragment dual-mode warhead was analyzed.And then,essential technologies such as the superposition effect of detonation wave asymmetric collision,the rod fracture mechanism and the influencing factors were studied.Finally,the structure of the dual-mode warhead was optimized in two steps.As a result of optimization,the formation rate of fragment kill elements and the integrity rate of the rod kill elements were 90% and 83%,respectively.The main research results are as follows:(1)Theoretical analysis shows that when the detonation wave occurs in Mach launch,the superposition pressure can reach more than twice the initial detonation pressure.With the asymmetric collision condition,the distance between the collision position and the symmetry line of the detonation point and the detonation time interval approximately satisfy the linear relationship.(2)The fracture behavior of rods is mainly influenced by the thickness and material type of the detonation wave controller,and the distance between the auxiliary charge.When the thickness of the detonation wave controller exceeds 10 mm,detonation waves begin to interact as expected.And the superposition pressure will increase if the auxiliary charge distance increases.The delay and attenuation effect on the detonation wave will be stronger with the material density increasing or the sound velocity decreasing of the controller.(3)The ratio of the inner main charge radius of the dual-mode warhead to the thickness of the outer main charge is greater than or equal to 1.4,and the ratio of the auxiliary charge pitch to the thickness of the outer main charge is equal to 1.0,and the thickness of the detonation wave controller is 20 mm,the fragment formation rate and the rod integrity rate reached respectively 90% and 83%.And the initial obtained speed of the fragment kill elements and the rod kill elements exceeded 1850 m/s and 1600 m/s,respectively.