Initial Velocity Distribution of Fragments from Cylindrical Charge Shells with Different Thick End Caps

GAO Yueguang;FENG Shunshan;LIU Yunhui;HUANG Qi

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2022, Vol. 43 ›› Issue (7) : 1527-1536. DOI: 10.12382/bgxb.2021.0443
Paper

Initial Velocity Distribution of Fragments from Cylindrical Charge Shells with Different Thick End Caps

  • GAO Yueguang, FENG Shunshan, LIU Yunhui, HUANG Qi
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Abstract

The end cap thickness is an important factor to be considered in the accurate design of fragmentation warheads, so this study focues on the initial velocity distribution of fragments from cylindrical charge shell with different thick end caps, which is detonated at the center of one end. Based on theoretical analysis and SPH numerical simulation, the models of cylindrical shells are established, and then the theoretical formula of axial distribution of the initial fragment velocity is proposed. The results show that, with the increase in thicknesses of two end caps, the effect of axial rarefaction waves decreases, and the fragment velocity near the two ends increases accordingly. The acceleration effect of detonation products is the main cause of the velocity increase of fragments near the detonation end, while the acceleration effect of detonation waves is the main cause of the velocity increase of fragments near the non-detonation end. Compared with the fragments near the detonation end, the acceleration of the fragments near the non-detonation end is more apparent. The proposed formula is more suitable for end caps and materials in engineering and the relative error can be significantly reduced. The findings of this study can provide reference for the accurate design of warheads.

Key words

ordnancescienceandtechnology / initialfragmentvelocity / Gurneyequation / axialrarefactionwaves / numericalsimulation

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GAO Yueguang, FENG Shunshan, LIU Yunhui, HUANG Qi. Initial Velocity Distribution of Fragments from Cylindrical Charge Shells with Different Thick End Caps. Acta Armamentarii. 2022, 43(7): 1527-1536 https://doi.org/10.12382/bgxb.2021.0443

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