Coupling Action Spans for Air-Blast Waves and Fragments by Fragmentation Warheads Exploding in Air
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摘要: 为探讨破片式战斗部空中爆炸下冲击波与破片的耦合作用机制，通过分析冲击波和破片在空气中的运动规律，在考虑壳体对冲击波强度的影响下，建立了冲击波与破片耦合作用区间的理论计算模型，并采用相关文献试验结果进行了对比。在此基础上，结合实例讨论了耦合作用区间随各影响因素的变化规律。结果表明，战斗部装填系数、装药爆速、壳体厚度以及能量分配对耦合作用区间的影响较大，而装药爆热、破片质量及破片形状对耦合作用区间的影响较小；随着装填系数、装药爆热和爆速、破片质量及冲击波能量与破片动能的比值的增大，耦合作用区间均减小；而随着壳体厚度和破片形状不规则度的提高，耦合作用区间增大。Abstract: In the present work, to find out the mechanisms of the coupling effect for blast waves and fragments by fragmentation warheads exploding in the air, we developed a theoretical model by analyzing the motion patterns of the blast waves and fragments moving in the air in consideration of the influence of the shell on the intensity of the shock wave.Meanwhile, we carried out an analysis of an actual case and examined the factors that influence the coupling action spans.The results show that the warhead loading coefficients, detonation velocities, shell thicknesses and energy allocations have a great influence on the coupling action spans, whereas the influence of the explosion heats, masses and shapes of the fragments is relatively limited.The coupling action spans decrease with the increase of the loading coefficients, explosion heats and detonation velocities of the explosives, fragment masses and the energy ratio of the shock wave energy to the fragment kinetic energy.However, as the shell thickness gets bigger and the fragment shapes become more abnormal, the coupling action spans become larger.
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Key words:
- fragmentation warhead /
- air-blast wave /
- high-velocity fragment /
- coupling action span
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图 1 空爆冲击波波阵面传播速度与比例爆距的关系
Figure 1. Relation between scaled stand-off distance and propagation velocity of air-blast wave front
图 3 装填系数对耦合作用区间大小的影响
Figure 3. Influence of loading coefficient on coupling action spans
图 5 装药爆速对耦合作用区间大小的影响
Figure 5. Influence of detonation velocity on coupling action spans
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