Optimal design of EFP based on LS-DYNA and Grey theory

EFP has already been used broadly in long distance anti-armor weaponry systems, and we try to use it to deal with the unexploded aero-ammunitions under the ground, and the design of EFP is the sticking point. We analyze the factors that affect jetting projectile formation of the shaped charge through numerical simulation. Grey relative degree of each factor is obtained through grey relational theory. It is suggested that altitude and apex angle of liner, thickness of the liner wall , and altitude of the shaped charge are the main factors affecting formation performance of jetting projectile. Jetting projectile formation is controlled by thickness of the liner wall seriously and the tip and tail velocity difference of jetting projectile is affected by apex angle of liner. The analysis indicates that the grey theory is a useful way to determine liner parameters in liner design.