Study on the Initiation Regularity of Warhead under Fragment Impact

HA Hai-rong; WANG Tuan-meng; LU Zhong-bao; LI Qin

doi:10.11993/j.issn.2096-3920.2021.04.014

Volume 29 Issue 4

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HA Hai-rong, WANG Tuan-meng, LU Zhong-bao, LI Qin. Study on the Initiation Regularity of Warhead under Fragment Impact[J]. Journal of Unmanned Undersea Systems, 2021, 29(4): 464-470. doi: 10.11993/j.issn.2096-3920.2021.04.014

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HA Hai-rong, WANG Tuan-meng, LU Zhong-bao, LI Qin. Study on the Initiation Regularity of Warhead under Fragment Impact[J]. Journal of Unmanned Undersea Systems, 2021, 29(4): 464-470. doi: 10.11993/j.issn.2096-3920.2021.04.014

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Study on the Initiation Regularity of Warhead under Fragment Impact

doi: 10.11993/j.issn.2096-3920.2021.04.014

The 705 Research Institute, China State Shipbuilding Corporation Limited, Xi’an 710077, China

Received Date: 2019-08-19
Rev Recd Date: 2020-03-08
Publish Date: 2021-08-31

Abstract

Abstract

For the fragment impact safety of a full-scale warhead with RS211 charge, in this paper, the full-scale simulation model of a fragment impact warhead with RS211 charge is established by using the non-linear finite element software LS-DYNA. Experimental tests are then conducted to verify the simulation results. The average error of the final velocity of the shell expansion is 3.7%, indicating that the accuracy of the simulation is reasonable; therefore, the model can be used in simulation research. Finally, the initiation regularity of the fragment impact warhead, considering different values of velocity, mass, and shape, is studied, resulting in the initiation threshold. The velocity threshold of a cylindrical fragment with a cone top impacting and initiating warhead is 1 360 m/s. When the velocity is 1 830 m/s, the mass threshold of this cylindrical fragment is 11 g. Four types of fragments, which can be detonated when the warhead is charged, formed by different shapes impact the warhead at 1 830 m/s. However, the peak pressure of spherical fragments impacting the warhead is smaller than those of the others, probably due to their smooth shape, in which sharp angles are absent. This paper can be used as a reference to research the safety of a full-scale warhead fragment impact.
- warhead,
- fragment impact,
- initiation regularity,
- initiation threshold

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References(21)

References

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Study on the Initiation Regularity of Warhead under Fragment Impact

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