目的 为提高聚能战斗部对含水复合结构的侵彻能力,研究偏心亚球缺型杆式射流（JPC）水下成型特性及其毁伤效能。方法 通过数值模拟方法,分析药型罩壁厚和偏心距增量对JPC水下成型及双层水间隔靶毁伤效果的影响。结果 药型罩壁厚在3.5⁓5.0 mm内增大时,JPC入水初速下降了17.19%,但质量增加使其存速能力显著提升,存速提升了24.14%,双层水间隔靶的开孔孔径和挠度变形均不断增大,且对前靶的毁伤效果提升更明显,前、后靶开孔孔径分别提升了32.9%与36.3%,靶板挠度分别增加了15.6%与26.5%;偏心距增量由0 mm增至1.2 mm时,JPC初速提高了14.99%,前靶开孔孔径增大了68.69%,挠度增加了88.4%,而后靶开孔孔径下降了41.15%,挠度呈现先增后减趋势。结论 综合JPC存速性能、形态完整性及后效毁伤能力,确定壁厚δ=4.5 mm、偏心距增量b=0.9 mm为最优参数组合,本研究为水下聚能战斗部的优化设计提供了参考数据。
Abstract
The work aims to investigate the underwater formation and damage effectiveness of eccentric hemispherical JPC warheads to enhance the penetration capability of shaped-charge warheads against water-containing composite structures. Using numerical simulation, the influences of liner wall thickness and eccentricity increment on the underwater formation of the JPC and on the damage inflicted to a double-layer water-interspaced target were analyzed. The results showed that when the liner wall thickness increased within the 3.5-5.0 mm range, the initial velocity of the JPC upon water entry decreased by 17.19%, but the increased mass significantly improved its velocity retention by 24.14%. Both the hole diameter and deflection deformation of the double-layer water-interspaced target increased continuously, with more significant enhancement in damage to the front plate. The apertures of the front and rear plates increased by 32.9% and 36.3%, respectively, and the deflections increased by 15.6% and 26.5%, respectively. As the eccentricity increment increased from 0 mm to 1.2 mm, the initial velocity of the JPC improved by 14.99%, the hole diameter on the front plate increased by 68.69%, and the deflection increased by 88.4%, whereas the hole diameter on the rear plate decreased by 41.15%, and its deflection showed a trend of first increasing and then decreasing. Considering the JPC's velocity retention, morphological integrity, and post-penetration damage effectiveness, the optimal parameter combination is determined as a liner wall thickness δ=4.5 mm and an eccentricity increment b=0.9 mm. This study provides reference data for the optimal design of underwater shaped-charge warheads.
关键词
双层水间隔靶 /
水下爆炸 /
偏心亚球缺型JPC /
数值模拟 /
毁伤效应
Key words
double-layer water-interspaced target /
underwater explosion /
eccentric hemispherical JPC /
numerical simulation /
damage effect
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