EFFECTS OF STRUCTURAL PARAMETERS ON THE SHOCK WAVE OVERPRESSURE CHARACTERISTICS OF A MULTILAYER COMPOSITE CHARGE

Abstract

This work examined a multilayer composite charge composed of an internal explosive charge, an intermediate non-explosive material and an outer aluminized explosive arranged in a coaxial structure. Using numerical simulations, a back propagation (BP) neural network algorithm and experimental verification, the shock wave overpressure characteristics of multilayer composite charges s having various structural parameters and initiation modes were examined. The ratio of the shock wave overpressure increase from simultaneous initiation of the internal and external charges to that generated by initiation of the central single charge was used to assess the effects of the structural parameters, overpressure increase ratio and suitable ranges for these parameters were generated. The structure of the composite charge was then optimized based on BP neural network calculations. The reliability of the numerical simulation method was verified by actual static explosion tests of warheads.