Theoretical Model for Impact Load of Kinetic Energy Missile

doi:10.12382/bgxb.2024.0041

Abstract

Abstract:

Kinetic energy missile is a new type of anti-armor weapon that combines the effects of kinetic energy strike and armor penetration, but there is currently no relevant theoretical model available for reference regarding the load characteristics and influencing factors of impact process. The load characteristics of the impact process of kinetic energy missiles are studied. By considering the missile-target action behaviors in different velocity ranges, a calculation model for the impact load of kinetic energy missile body is established. The calculated results indicate that the impact load of missile is directly related to the geometric characteristics, impact velocity, density, strength, and other properties of missile. The change in the impulse of missile is relatively small at low velocity, but at high velocity, the rebound of the shattered mass significantly increases the impulse, and the impulse contribution of the shell accounts for a larger proportion of the impact impulse. The amplitude of impact load curve increases with the increase of shell strength and density, but the influence of density on the load waveform characteristics is more obvious. At the same velocity, the influence of shell strength on the momentum transfer factor of missile is relatively small, but the influence of shell density has a significant effect on it. At the same velocity, the influence of shell strength on the momentum transfer factor of missile is relatively small, while the shell density has a greater impact on it, The transfer factor curve shows a trend of increasing first and then decreasing with the increase in density.

Key words: kinetic energy missile, impact load, hypervelocity penetration, momentum transfer

CLC Number:

O385

YANG Zehuan, ZHANG Xianfeng, LIU Chuang, TAN Mengting, XIONG Wei. Theoretical Model for Impact Load of Kinetic Energy Missile[J]. Acta Armamentarii, 2024, 45(S1): 20-32.

Figures/Tables 23

Fig.1 Process of missile impacting the target at low velocity

Fig.2 Velocity distribution function of different parts of missile

Fig.3 The process of missile impacting the target at high velocity

Fig.4 Solving flowchart of calculation model

Fig.5 Structure and shape of test missile

Fig.6 The schemes of kinetic energy missiles with different mass ratios

Fig.7 The structural functions of missile

Table 1 Geometric and mass parameters of kinetic energy missile

弹体方案	弹体长度/ mm	弹芯长度/ mm	弹芯直径/ mm	弹体质量/ g
方案1	96.6	14.5	7.5	128.3
方案2	106.6	24.5	6.5	128.3
方案3	116.6	34.5	5.5	128.3

Table 2 Material parameters of missile and target

	材料密度/ (g·cm^-3)	屈服强度/ MPa	剪切模量/ GPa	材料泊松比
穿甲弹芯	17.6	631.0	-	0.28
壳体	2.85	602.5	-	0.33
靶体	7.8	553.0	77	0.30

Table 3 Comparison of experimental and theoretical target velocities

弹速/ (m·s^-1)	方案1靶体速度/(m·s^-1)
弹速/ (m·s^-1)	文献[8]试验值	本文模拟值	误差
1018	6.78	6.43	5.2%
1068	6.82	6.67	2.2%
1335	9.03	8.09	10.4%

Table 4 Comparison of numerically simulated and theoretical target velocities

弹速/ (m·s^-1)	方案2靶体速度/(m·s^-1)			方案3靶体速度/(m·s^-1)
弹速/ (m·s^-1)	文献[8] 模拟值	本文模拟值	误差	文献[8] 模拟值	本文模拟值	误差
1068	7.37	6.58	10.7%	7.36	6.60	10.32%
1335	9.39	8.00	14.8%	9.75	8.35	14.4%
1500	11.02	10.03	9.0%	11.32	10.27	9.3%
1700	12.3	13.82	12.4%	12.72	14.57	14.5%

Fig.8 The variation of missile impact load at different impact velocities

Fig.9 The relationship between normalized peak load and initial impact velocity

Fig.10 The relationship between momentum transfer factor and initial impact velocity

Fig.11 The relationship between the composition of missile impulse and initial impact velocity

Fig.12 The variation of impact load under the condition of different shell strengths

Fig.13 The variation of head and tail velocities under the condition of different shell strengths

Fig.14 The relationship between the total impulse and the shell strength under different impact velocities

Fig.15 The relationship between momentum transfer factor and shell strength under different impact velocities

Fig.16 The variation of impact load under the condition of different shell densities

Fig.17 The variation of head and tail velocities under the condition of different shell densities

Fig.18 The relationship curve between the total impulse and the shell density under different impact velocities

Fig.19 The relationship between momentum transfer factor and shell density under different impact velocities

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