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Study on the response of the warhead under the action of shock waves

Author: ChengBo
Tutor: LiWenBin
School: Nanjing University of Technology and Engineering
Course: Artillery , automatic weapons and ammunition Engineering
Keywords: warhead shock initiation response barrier structure impedance
CLC: TJ410.33
Type: Master's thesis
Year: 2014
Downloads: 27
Quote: 0
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Abstract


This research topic’s background is insensitive ammunition technology, the response of the warhead to shock wave and proposing a new insensitive warhead structure are the main research content.In this dissertation, based on the assumptions of side-wall having no effect on shock initiation and one dimensional plane shock, the warhead loaded by shock wave was simplified as covered charge model, and then the shock initiation mechanism of warhead was analyzed when the shock was one dimensional plane detonation wave; By simplifying the shape of the detonation wave of donor charge, the effect of donor explosive was equivalent to projectile impact, and the initiation criterion was proposed. The interaction between warhead and shock wave was analyzed by impedance matching method, and found out that there were three ways to decrease the shock sensitivity of warhead, i.e. increasing the thickness of barrier, using materials in which shock attenuated faster and applying reasonable multi-story barrier structure. And the course of initiation of simplified model was simulated in AUTODYN, the material and structure’s effect on the response of warhead under the condition of single layer barrier and multi-story barriers, and the course of energy distribution were investigated. And this was a essential analysis on how to improve the insensitivity of warhead from barrier structure. Based on the simulation, contrastive experiment research on both double-barrier covered charge and single barrier one was proceed, new warhead structure was designed and shock sensitivity experiment on this warhead were carried out, and the results showed that double barrier structure, no matter in covered charge model or real warhead, could lower the shock sensitivity of warhead’s charge significantly. And these research findings might provide feasible way for lowering the shock sensitivity of ammunition.

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CLC: > Industrial Technology > Arms industry > Ammunition, fuses, pyrotechnics > Ammunition > General issues > Structure > Projectiles, warheads, warhead
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