Preliminary simulation of blast shutter driven by glancing detonation
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摘要: 利用有限元方法，通过数值模拟得到爆炸密封铝、铜封管密封所需炸药药量；在此基础上，利用光滑粒子法对爆炸密封模型进行优化，分析炸药、保护外壳等形状等对封管密封性能的影响。基于对计算结果的分析，确定实验模型。实验回收结果和数值模拟结果符合较好，表明数值模拟结果对实验设计有指导作用。Abstract: The mass of explosive which the aluminum/copper cylinder shells were blasted shutter was found with finite element methods. And on the basis of this, the blast shutter models were simulated many times by the smoothed particle hydrodynamics method to achieve optimization. Then the experimental models were determined by comparing the simulation results. The experimental results agree with the simulation results. So the simulation results can be helpful for understanding the experimental results, and it saves the time and increases the efficiency.
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图 3 铝封管内壁上均布的10个位置的粒子速度历史曲线
Figure 3. Particle velocity-time curves of ten points at the inwall of the aluminum sealing tube
图 4 铜封管内壁上均布的10个位置的速度历史曲线
Figure 4. Particle velocity-time curves of ten points at the inwall of the copper sealing tube
图 5 数值模拟得到的图像和实验回收样品的照片
Figure 5. The image obtained by numerical simulation and the photo of the recoverd specimen in experiment
图 8 铝封管实验结果和计算结果的比较
Figure 8. Comparison between simulation and experiment for the aluminum sealing tube
图 9 铜封管实验结果和计算结果的比较
Figure 9. Comparison between simulation and experiment for the copper sealing tube
表 1 材料参数
Table 1. Material parameters
材料 材料参数 状态方程参数 ρ0/(g·cm-3) G/GPa Y0/GPa dG/dp dG/dT dY/dp Tm/kK c0/(km·s-1) λ γ0 T2 8.93 47.7 0.064 1.35 -1.798 3.396 1.79 3.94 1.489 2.02 LY12 2.703 27.6 0.29 1.8 -1.700 1.890 8 1.22 5.24 1.4 1.97 45_steel 7.9 77 0.34 1.74 -3.504 7.684 2.38 4.57 1.49 1.93 CH2 0.915 2.901 1.481 1.64 Teflon 2.16 2.33 0.05 1.34 1.93 0.90 
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