Designed Preformed Fragments For Certain Warhead And Numerically Simulated Penetrating Pow Er Of Preformed Fragments

With the development of computer technology and numerical methods, nowadays the numerical simulation is widely used in the area of explosion mechanics. Based on analyzing characteristics of light armored target, the enhance damage effect design that add prefabricated fragments to a certain grenade was designed by using the software UG NX4.0.The scattering characteristics of spherical fragments under blasting were obtained by using the software ANSYS10.0/LS-DYNA.The initial velocity and the physical process were all obtained, the numerical simulation was in a good agreement with the results of literature, it shows that the finite element model is suitable. The velocity attenuation regularity of tungsten alloy spherical fragment in the air was also discussed, via finite element program, penetrating of45steel target with spherical fragment was simulated, from which the terminal velocity was obtained. The grenade’s material properties and the light armored target’s characteristics were not researched deeply in this paper, and the scattering effect and quality loss under detonation wave about tungsten alloy spherical fragments were not discussed, it would be resolved in the latter work.