On the interaction between shaped charge jets and confined explosives at normal incidence

The normal incidence of shaped charge jets on confined explosive sheets is investigated through a series of 2D numerical simulations with the Eulerian code PISCES 2DELK. The basic mechanisms of the interaction are explored us ing a relatively simple criterion for the sheet efficiency to disrupt the j et, which is based on the undisturbed length of the emerging jet. The simul ations are compared with experimental results published several years ago a nd the agreement is good. Using these simulations we show how one can optim ize the efficiency of this interaction by using non-symmetrical confinement plates and stronger explosive sheets. (C) 1999 Elsevier Science Ltd. All r ights reserved.