Numerical Analysis of Falling Response of Large Warhead in Cabin
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摘要: 采用ANSYS/LS-DYNA动力学仿真软件模拟战斗部跌落试验，基于材料本构模型对战斗部跌落安全性进行预测，得到了不同状态下战斗部跌落的结构变形和装药响应数据。结果表明：带舱战斗部45°倾斜跌落时，壳体和主装药受到的应力和过载均最小，但舱体变形最严重；战斗部大端向下垂直跌落时，壳体受到的应力较小，但炸药受到的应力和过载均最大，工况最恶劣。研究结论为带舱大型战斗部的跌落考核试验提供了指导。Abstract: In this study, we used the ANSYS/LS-DYNA software to simulate the fall test of the cabin warhead in order to predict its safety performance, and obtained the structural stress deformation and charge overload response of the combat simulation of the warhead in different states.The results show that the stress and overload of the shell and the main charge are the smallest when the cabin warhead is tilted at 45°, but the deformation of the shell is the most severe; and the stress of the shell is small when the large part of the warhead is dropped vertically, but the stress and overload of the charge are the largest, indicating the worst assessment posture.The actual fall test of the large warhead in cabin is successfully passed, and the numerical simulation can provide theoretical support.
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Key words:
- ammunition safety /
- fall test /
- cabin warhead
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表 1 炸药材料本构方程
Table 1. Constitutive equation of explosive materials
ρ/(kg·m-3) E/GPa υ σY/MPa ETAN/MPa FAIL tDEL C 1700 8.56 0.25 209 231 0 0 0 
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表 2 靶板材料模型及参数
Table 2. Target material model and the parameters
ρ/(kg·m-3) E/GPa υ N 7850 200 0.3 0
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表 3 扩爆药柱材料模型及参数
Table 3. Booster explosive material model and the parameters
ρ/(kg·m-3) E/GPa υ σY/MPa ETAN/MPa C P vP 1630 2.90 0.25 190 210 0 0 0
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表 4 破片材料模型及参数
Table 4. Fragment material model and the parameters
ρ/(kg·m-3) E/GPa υ σY/MPa ETAN/MPa β 19 250 350 0.25 1.5 170 1
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表 5 跌落试验仿真计算结果
Table 5. Fall test simulation results
Case Maximum stress of shell/MPa Maximum stress of charge/MPa Maximum charge overload/g 1 299.2 23.30 312.1 2 354.0 15.84 237.4 3 602.6 7.86 161.7 4 283.9 2.98 33.1
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