高速杆式弹侵彻下蓄水结构防护效能数值分析

Numerical analysis of protective efficacy of water-filled structure subjected to high velocity long-rod projectile penetration

为探讨蓄水结构抗侵彻防护效能,采用动态非线性有限元,结合箱型蓄水结构弹道冲击试验,分析了蓄水结构在高速杆式弹侵彻下的防护效能及水介质对结构吸能性能的影响,并将有限元结果与试验结果进行了比较,两者吻合良好。比较结果表明:水介质的抗侵彻吸能能力随弹体初速v0的增加而迅速增强;当v0>1 500m/s时,其防护效能高于同等重量的船用钢。

To reveal the anti-penetration protective efficacy of the water-filled structure, the clynamlc nonlinear finite element is adopted. Combined with the ballistic impact test of square water-filled structure, this paper explores the protective efficacy of the water-filled structure subjected to the high velocity long-rod projectile impact, analyzes the influence of water media on the energy absorption properties of the structure and compares the finite-element results with the experimental ones, which are in good agreement. The results show that the anti-penetration and energy-absorption capability of water medium increases rapidly with the projectile velocity v0. And that when v0 is over 1 500 m/s, its protective efficacy is higher than that of the marine steel of the same weight.