A study on the influence of wave shape controller on fragment scattering characteristics of fragmentation warhead

LIU Wei; LIANG Zhengfeng; RUAN Xijun; QU Kepeng

doi:10.11883/bzycj-2022-0202

Volume 43 Issue 2

Feb. 2023

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LIU Wei, LIANG Zhengfeng, RUAN Xijun, QU Kepeng. A study on the influence of wave shape controller on fragment scattering characteristics of fragmentation warhead[J]. Explosion And Shock Waves, 2023, 43(2): 023203. doi: 10.11883/bzycj-2022-0202

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LIU Wei, LIANG Zhengfeng, RUAN Xijun, QU Kepeng. A study on the influence of wave shape controller on fragment scattering characteristics of fragmentation warhead[J]. Explosion And Shock Waves, 2023, 43(2): 023203. doi: 10.11883/bzycj-2022-0202

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A study on the influence of wave shape controller on fragment scattering characteristics of fragmentation warhead

doi: 10.11883/bzycj-2022-0202

Xi’an Modern Chemistry Research Institute, Xi’an 710065, Shaanxi, China

Received Date: 2022-05-11
Rev Recd Date: 2022-07-21

Available Online: 2022-09-09

Publish Date: 2023-02-25

Abstract

Abstract

In order to improve the uniformity of the fragments of the fragmentation warhead and enhance the axial lethality of the warhead, it was proposed to use a wave shape controller to control the scattering direction of the fragments. The shape of the wave shape controller was designed based on the law of detonation wave reflection at the wave shape controller interface and the Shapiro formula. The LS-DYNA software and ALE（arbitrary Lagrange-Euler） algorithm were used to numerically simulate the scattering process of fragments, and the static explosion test of the warhead prototype was carried out to verify the rationality of using the wave shape controller to improve the scattering characteristic of fragments. The difference in the fragment scattering processes with and without the wave shape controller were compared. The law of fragment scattering velocity and scattering angle of the warhead was analyzed and summarized when there was no wave shape controller and when the wave shape controller materials were nylon, polyurethane and PTFE（polytetrafluoroethylene）, respectively. The results show that the wave shape controller can reduce the difference in the scattering velocities of the fragments between the center and both ends of the warhead, and evenly change the direction angles of the fragments scattering from the center to both ends, so that the fragments are distributed more uniformly along the axial direction. The wave shape controllers made of different materials have different effects on the scattering characteristics of the fragments, while the use of the wave shape controller reduces the fragment scattering velocity, reduces the fragment scattering angle, and increases the fragment distribution density. The error between the numerical calculation values and experimental values of fragment scattering angle is within 6.53%. Compared with that without a wave shape controller, the fragment scattering angles of the warhead prototypes with the wave shape controller and the material is nylon, polyurethane and PTFE reduced by 40.00%, 44.00% and 46.67%, respectively.
- fragmentation warhead,
- wave shape controller,
- Shapiro formula,
- fragment scattering characteristic,
- fragment scattering velocity,
- fragment scattering angle

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References(16)

References

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