Modelling of Shockwave Force and its Effect during Sabot Discard Process

Abstract

The dynamical motion of a FSAPDS projectile is affected due to the propellant gas force, aerodynamic, gravity along with mechanical force, and shockwave forces. In the sabot opening process, the mechanical action takes place and the sabot gets separated due to the shockwave force. In external mechanical action of sabot separation, the maximum stretch of the spring defines the end of third phase of motion. In this paper the motion of the projectile and its stability during this phase has been presented. The time delay in the sabot opening affects the stability of the projectile is discussed with the help of modified stability parameter.

Three-Dimensional Numerical Investigation of Hypersonic Projectile Launched by Railgun on Transitional Ballistics

“…This shock-wave impingement initiates the sabot separation after the exit of the projectile from the accelerator, increasing the aerodynamic force and moment on the sabot. However, the interaction also perturbs the projectile trajectory because the shock wave from the sabot impinges upon the projectile surface [6,7]. The shock-wave impingement upon the projectile wing substantially disperses the projectile flight [6]; thus, such perturbations should be suppressed by the design of the projectile/sabot.…”