Parametric Study of the Effects of Target Properties,Projectile Design,and Impact Conditions on Earth Penetration Processes.

摘要

There are a number of projectile and target parameters involved in the penetration dynamics of earth penetrating vehicles. The sensitivity of penetration processes to some of these parameters has been examined in a series of finite-difference code solutions. The spatial resolution required to obtain accurate code solutions of penetration dynamics has also been considered. The calculated penetration dynamics were not overly sensitive to variations in the target properties; the local shear strength and frictional characteristics of the material acting on the penetrator appeared to be the most important of the target parameters considered. A portion of the study was devoted to consideration of the impact conditions and the penetrator design. These variables were generally more important to penetration dynamics than variations of the constitutive properties of the target. These findings are favorable to the technology and development of earth penetrating weapons, since target property uncertainties are inevitable. Design and impact parameters, on the other hand, can generally be specific and controlled. (Author)