A three-dimensional penetration trajectory model for ogive-nosed projectile into metal targets

Abstract

The projectile-target encounter conditions always play an important part during the penetration of projectile into metal target. The presence of oblique angle, pitch, yaw and angular velocity of projectile, limiting the efficiency of penetration, can lead to fully three-dimensional (3D) penetration trajectory. Thus, a 3D penetration trajectory model for ogive-nosed projectile into metal target is developed based on the local interaction theory (LIT) and dynamic expansion theory with considering the oblique angle, pitch, yaw, and angular velocity of projectile. Then, the 3D penetration trajectory model is verified by comparing the calculation results with available experimental data. Besides, relevant parametric analysis is conducted, including obliquity with pitch, obliquity with yaw, obliquity coupled with pitch and yaw, angular velocity vertical to the plane of obliquity. The results show that obliquity coupled with pitch and yaw is the most influential factor for the stability of penetration trajectory, followed by the obliquity with pitch, the angular velocity vertical to the plane of obliquity and the obliquity with yaw. The deflections of projectile are aggravated as the above parameters increase except the angular velocity vertical to the plane of obliquity.