Numerical Simulation Of The Kinetic Energy Rod Class Warhead Destruction Elements Of Explosive-driven Research

The deeply understanding of the mechanism of kinetic energy (KE) rod warhead deployed by the explosion and the spray pattern of the penetrators in the target's direction is very important to the designing and optimizing of this kind of warhead. Because of the complexity of the mechanism, the precise theory analysis is very difficult c With the rapid development of the computer technology and numerical methods, Nowadays the numerical simulation has became an important assistant to the designing of this kind of warheads. Based on the previous studies of other people, we begin the study from establishing suitable FEM models , performing numerical calculations and has done some jobs as follows.Based on the analysis of the mechanism of kinetic energy rod warhead deployed by the explosion, we establish the three-dimension FEM models c These models include the complex phenomena of the detonation of the explosive , the spread of the blast wave, the initial driving of the rods by the explosion, the impact to each other among the rods, and the rods' flying in the air.We put these models into the three-dimension FEM analysis program LS-DYNA3D, calculate it and then get the characteristic of the distribution of the rods after they are being deployed, and the varying rule of the main physics parameter of the rods. As the main job of this paper , we discuss the influences on adding low density polyurethane foam around rods, the change of the distances between the rods and so onto the distribution patterns of these penetratorso And we explore the methods to improve the quality of rods pattern by adding four bays of warheads.After these calculations, some analysis has been done and then draw some elementary conclusions .In order to make an ever profound understand of the mechanism of kinetic energy rod warhead deployed by the explosion and study the influences on the spray patterns when we change the measures and material parameters of the components of the warheads, and to instruct the optimizing of the scheme of the experiment, some hard work is still need to do.