Calculation method for power parameters of damage element of shell charge

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (13) : 25-34.

ZHANG Sheng1,2, LI Shutao1, WANG Zhenqing2, CHEN Yeqing1

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Abstract

After the cased charge explodes, damage elements such as shock waves and fragments will be generated. Improving the calculation accuracy of damage element power parameters is of great significance for research on weapon destructive effects and engineering protection. In order to improve the calculation accuracy of power parameters of fragments and shock waves, a more accurate calculation formula for the initial velocity of fragment was proposed based on the modified energy conservation equation by analyzing the distribution law of cased charge explosion energy. The equivalent charge mass conversion method was used to calculate the equivalent charge mass of the shock waves generated by the cased charge explosion, by analyzing the formation process of the initial shock wave of the cased charge, a theoretical calculation model of the shock wave power parameters was established, and the scientificity and reliability of the calculation model were verified through experimental data. Through the established theoretical model, the calculation formula for the distance from the detonation source when the two damage elements overlap is derived, and the influencing factors are quantitatively analyzed. Research shows that the accuracy of the calculation method in this paper is better than the traditional calculation method of damage element power parameters, the errors in initial velocity of fragment, the overpressure peak value of shock waves, the arrival time of wave front and the experiment are 3%, 4.9% and 1.1%, respectively. The movement distance when the fragment barrage overlaps with the shock wave front is directly proportional to the explosive energy (detonation heat) and inversely proportional to the casing thickness (charge mass ratio).

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cased charge / fragment / shock wave / power parameters

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ZHANG Sheng1,2, LI Shutao1, WANG Zhenqing2, CHEN Yeqing1. Calculation method for power parameters of damage element of shell charge[J]. Journal of Vibration and Shock, 2024, 43(13): 25-34

References

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