Study on big entry hole bidirectional shaped charge

作者：Li Lei^*; Shen Zhao-Wu; Ma Hong-Hao

来源：Chinese Journal of High Pressure Physics, 2011, 25(6): 539-548.

• Average diameter
• Biconical liner
• Calculated values
• Charging structure
• Cone angle
• Explosively formed projectiles
• Hole size
• Jet formation
• Jet parameters
• Numerical results
• Penetration performance
• Shaped charge jet
• Shaped-charge jets
• Theoretical calculations

A shaped charge model, in which the biconical liner with the two-way charging structure was combined, was designed. Its jet formation mechanism was studied by means of numerical simulations, and the jet parameters were calculated. The obtained results were shown as follows: First, the small cone angle of the liner formed shaped charge jet, and the large cone angle formed explosively over-turned projectile. Second, the velocity of the jet tip and the projectile were respectively 6250 m/s and 1620.9 m/s. Third, the length and average diameter of the projectile were 26.1 mm and 8.6 mm. Based on the numerical results the jet penetrate formula was amended and then used to calculate the penetration depth of the shaped charge, and the calculated value was 69.6 mm. Finally, an experiment was carried out according to the model, the length and average diameter of the projectile were 28.1 mm and 8.8 mm. Furthermore, the penetration depth and hole size were 70 mm and 17 mm. Good agreement is among the numerical, theoretical calculation and the experimental results. In addition, the superior penetration performance is proved by the experimental results.

• 出版日期2011
• 单位中国科学技术大学