Optimum Design of Annular Double Done Shaped Charge Structure
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摘要: 在环形聚能装药结构中,单锥罩结构形成的射流中间有堆积现象,断裂前射流拉伸长度有限,而双锥罩射流兼顾了上锥小锥角形成高头部速度,下锥大锥角增大射流有效质量的优点,形成的射流更加细长,头部速度高且不易断裂。基于环形切割聚能装药战斗部,综合考虑上锥角大小、上锥罩占药型罩高的比例、药型罩的高度以及药型罩壁厚对射流侵彻能力的影响,并基于灰关联理论对双锥罩环形聚能装药的优化提供依据,通过数值仿真,研究表明:上下锥角对射流成型影响最大,通过比较,当上锥罩为34°、上锥占罩高比例为40%、药型罩高度为70 mm、药型罩壁厚为5 mm时,形成的射流头部速度高,且在空气中能够稳定飞行。相比单锥罩结构,双锥罩射流细长,在空气中飞行时间长,对靶板的侵深大于单锥罩射流。Abstract: There is accumulation in the middle of the jets formed by the single cone liner in the annular shaped charge structure, and the length of the jet is limited before the fracture.The jet of the double cone liner takes both the high head speed formed by upper small angle cone liner and increscent effective mass of the jet formed by the lower cone liner.Therefore, the jet is more slender with high head speed and it is not easy to break.Based on the annular cutting shaped charge warhead, the influence of the upper cone size, the proportion of the upper cone cover, the mask height and the wall thickness of the liner on the penetration capability of jet is considered.It is concluded that the upper cone angle has the greatest influence on the jet molding.By comparison, when the top cone cover is 34°, the proportion of top cone is 40%, the height of the liner is 70 mm and the wall thickness of the liner is 5 mm, the jet head can fly steadily in the air with a high speed.Compared with the single cone liner structure, the jet formed by the double cone liner is long and slender, and has long flight time in the air, its penetration capability is greater than that of the single cone jet.
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Key words:
- tandem warhead /
- annular double cone liner /
- orthogonal design /
- numerical simulation
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表 1 B炸药计算参数
Table 1. Material performance parameters of composition B
ρ/(g·cm-3) D/(m·s-1) pCJ/GPa A/GPa B/GPa R1 R2 ω E0/GPa V0 1.713 7500 28.6 524.2 7.678 4.2 1.1 0.34 8.499 1.0 ρ/(g·cm-3) G0/GPa σ0/GPa Tm0/K C/(m·s-1) S1 A β n a 8.96 47.7 0.12 1790 3940 1.49 63.5 36 0.45 1.5 表 3 30CrMnSiNi2A计算参数
Table 3. Material performance parameters of 30CrMnSiNi2A
A/MPa B/MPa n C m Tm/K T0/K S1 γ0 α 1280 420 0.30 0.03 1.00 1793 294 1.49 2.17 0.46 ρ/(g·cm-3) E/GPa μ σs/MPa 7.85 207 0.30 600 表 5 空气的计算参数
Table 5. Material performance parameters of air
ρ/(mg·cm-3) C4 C5 E0/(MJ·m-3) vrel 1.293 0.4 0.4 0.25 1.0 表 6 正交设计各因子水平值
Table 6. Orthogonal table
Level α/(°) b1/mm H/mm h·H-1/% 1 30 3.8 60 30 2 36 4.6 70 50 3 44 5.4 80 70 表 7 正交表设计与计算结果
Table 7. Orthogonal design and calculation result
No. α/(°) b1/mm H/mm h·H-1/% V/(m·s-1) L/mm 1 30 3.8 60 30 2807 25 2 30 4.6 70 50 2469 70 3 30 5.4 80 70 2488 70 4 36 3.8 70 70 2297 45 5 36 4.6 80 30 2804 70 6 36 5.4 60 50 2871 90 7 44 3.8 80 30 2834 40 8 44 4.6 60 70 2470 55 9 44 5.4 70 50 2508 70 表 8 无量纲化的参考序列与比较序列
Table 8. Dimensionless reference sequence and comparison sequence
No. X1′ X2′ X3′ X4′ Y1′ Y2′ 1 1 1 1 1 1 1 2 1 1.211 1.1667 1.6667 0.8796 2.8 3 1 1.421 1.3333 2.3333 0.8864 2.8 4 1.2 1 1.1667 2.3333 0.8183 1.8 5 1.2 1.211 1.3333 1 1.0003 2.8 6 1.2 1.421 1 1.6667 1.0228 3.6 7 1.467 1 1.3333 1 1.0096 1.6 8 1.467 1.211 1 2.3333 0.8799 2.2 9 1.467 1.421 1.1667 1.6667 0.8935 2.8 表 9 灰关联度矩阵
Table 9. Grey correlation matrix
Reference sequence Comparison sequence α b1 H h·H-1 V1 0.528 0.475 0.554 0.373 L 0.740 0.714 0.755 0.579 -
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