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Initial Velocity Calculation of Eccentric Initiation Warhead Fragment based on Infinitesimal Method
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Xi′an Modern Chemistry Research Institute, Xi′an 710006, China

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    Abstract:

    The distribution of initial fragment velocity in the aim direction is one of the important factors for evaluating the power of the directional warhead. Therefore, the calculation method of the initial fragment velocity in the whole domain on the directional side of the warhead under the eccentric double-line initiation and the kinetic energy gain compared with the central initiation are studied. Based on the infinitesimal theory, the calculation method of the initial fragment velocity in different circumferential position on the directional side was derived, and the static explosive experiment of the warhead was carried out to compare with the theoretical result. Combined with the numerical result of the warhead, the axial velocity correction function was fitted, and the universality of the algorithm was verified according to the existing research. It is shown that the proposed formula is suitable for the warhead with eccentric double-line initiation, and the error between theoretical calculation and test results is within 4.80%, calculation result is consistent with actual situation. The fitting correction function can predict the initial velocity of the fragments in different axial direction. The algorithm still has good universality when the warhead parameters change and the calculation error is less than 7.11%. Compared with central initiation, the eccentric double-line initiation mode with an angle of 60° can increase the total kinetic energy of the fragments in the range of -30°-30° from the center of the directional side by 34.9%.

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刘恒言,梁争峰,阮喜军,等.基于微元法的偏心起爆战斗部破片初速计算方法[J].含能材料,2024,32(7):683-692.
LIU Heng-yan, LIANG Zheng-feng, RUAN Xi-jun, et al. Initial Velocity Calculation of Eccentric Initiation Warhead Fragment based on Infinitesimal Method[J]. Chinese Journal of Energetic Materials,2024,32(7):683-692.

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History
  • Received:January 15,2024
  • Revised:April 26,2024
  • Adopted:April 15,2024
  • Online: April 17,2024
  • Published: July 25,2024