Energy absorption hinge of evolvable warhead
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摘要: 基于展开式战斗部动力学展开原理及理论模型，设计一种具有能量吸收特性的限位铰链，并对不同辅助装药量下展开式战斗部的展开过程进行数值模拟，对比分析了普通铰链和能量吸收铰链的展开过程，重点研究了限位角度时的受力与能量吸收情况，结果表明能量吸收铰链可以更好地降低碰撞力及提高吸能效果。对两种铰链装配的展开式战斗部结构进行了静爆实验，结果显示普通铰链发生不同程度的破坏，而能量吸收铰链结构完整，证明能量吸收铰链达到限位角度时能有效保证战斗部及铰链的完整性，进而验证了能量吸收铰链设计的合理性以及数值模拟的可靠性。Abstract: The limit hinge is one of key technologies in the design of evolvable warheads, and its damage efficiency is determined by keeping its integrity in the deploying process of the warhead. In this paper, a novel hinge with energy absorption properties was designed based on dynamic principles and theoretical models of evolvable warheads, and the evolving process of the evolvable warhead with charges of varying sizes was numerically simulated, and the different performances of the ordinary hinge and the energy absorption hinge compared and examined, with a particular focus on the status of force and energy absorption undergone by the warhead when the limit angel was reached. The results show that the energy absorption hinge can reduce the impact force and improve energy absorption. The results of the experiment carried out on the evolvable warhead structure equipped with the two kinds of hinges show that the traditional hinge suffers damage in varying degrees, while our novel hinge with energy absorption keeps the structural integrity, proving that the energy absorption hinge will ensure the integrity of the warhead and the hinge when reaching the limit angel, and verifying the rationality of the energy absorption hinge design plan and the reliability of the numerical simulation.
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图 8 不同装药量下主装药结构展开角度
Figure 8. Evolving angles of main charge structure with different auxiliary charges
图 10 15 g装药量下铰链状态的数值模拟与实验结果对比
Figure 10. Simulation and experimental results of status of hinges with 15 g charge
图 11 20 g装药量下铰链状态的数值模拟与实验结果对比
Figure 11. Simulation and experimental results of status of hinges with 20 g charge
表 1 凸台吸能效率
Table 1. Boss energy absorption efficiency
α/(°) η/% s=2 mm s=3 mm s=4 mm 5 18.6 29.4 36.8 10 21.8 33.2 41.2 
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表 2 不同药量下铰链的碰撞力峰值和能量吸收
Table 2. Impact peak value and energy absorption of hinge with different charges
m/g PoA/kN PeA/kN PoB/kN PeB/kN EoA/J EeA/J EoB/J EeB/J 15 175 129 226 156 11 355 12 508 15 688 16 076 20 209 169 320 182 14 466 19 964 34 432 40 469 26 268 176 401 200 21 962 29 907 50 381 58 509
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表 3 实验数据
Table 3. Experiment data
实验 铰链结构 m/g ts/ms te/ms 铰链状态 1 普通 15 12.0 12.8 部分断裂 2 普通 20 9.2 9.9 完全断裂 3 能量吸收 15 12.3 13.0 完整 4 能量吸收 20 9.0 9.5 完整
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