Influence of eccentric initiation on energy distribution gain of a warhead charge

DENG Hai; QUAN Jialin; LIANG Zhengfeng

doi:10.11883/bzycj-2021-0280

Volume 42 Issue 5

May 2022

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DENG Hai, QUAN Jialin, LIANG Zhengfeng. Influence of eccentric initiation on energy distribution gain of a warhead charge[J]. Explosion And Shock Waves, 2022, 42(5): 052201. doi: 10.11883/bzycj-2021-0280

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DENG Hai, QUAN Jialin, LIANG Zhengfeng. Influence of eccentric initiation on energy distribution gain of a warhead charge[J]. Explosion And Shock Waves, 2022, 42(5): 052201. doi: 10.11883/bzycj-2021-0280

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Influence of eccentric initiation on energy distribution gain of a warhead charge

doi: 10.11883/bzycj-2021-0280

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

Received Date: 2021-07-05
Rev Recd Date: 2021-11-11

Available Online: 2022-03-30

Publish Date: 2022-05-27

Abstract

Abstract

In order to study the influence of different ways of eccentric initiation on the energy distribution and the gain of explosive charge, a theoretical model of eccentric initiation warhead is established, and the concept of energy distribution center is introduced. By introducing the variable of local loading ratio, the calculation formula of initial velocity of fragments of eccentric initiation warhead is formulated. In this paper, the velocity gain of fragments and energy gain with different initiation modes under the sextile condition are compared and analyzed by using numerical simulation and experimental verification. The results show that at the directional orientation, the maximum pressure at the edge of multi-line eccentric initiation is significantly greater than that of eccentric single line initiation and central initiation, and the detonation pressure at the edge of charge increases from 23.5 GPa of central initiation to 36.2 GPa of asymmetrical two lines 60° initiation; The distribution law of fragment velocity in the direction of 0°−30° is similar to the distribution law of maximum pressure at the edge of charge. Taking the central initiation as the benchmark, the relationship of velocity gain with the directional orientation takes the following relation: asymmetrical two lines 60°>asymmetrical three lines 120°>asymmetrical two lines 120°>asymmetrical one line. When asymmetrical two lines 60° initiation, the fragment velocity gain in the target direction is 25.47%. Finally, through the verification of experiments and theoretical calculation, it is concluded that the energy proportion in the directional area of adjacent asymmetrical two lines 60° is the highest, with the energy gain in this area being 47.42%; followed by asymmetrical three lines 120einitiation, with the energy gain being 38.84%; then symmetrical two lines 1202initiation, with the energy gain being 36.98%; and finally asymmetrical one line initiation, with the energy gain in the directional area being 32.72%.
- eccentric initiation,
- energy distribution,
- energy gain,
- initiation mode,
- fragment velocity

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References(18)

References

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