摘要
为了研究飞机蒙皮在12．7mm标准机枪弹丸射击下的损伤，对3mm厚LY-12CZ材料的单蒙皮及其加筋板进行了模拟弹击试验。通过试验研究，建立了一个由高速气炮、弹体与弹托分离机构、连续位移激光测速装置和弹丸回收装置组成的系统并被有效地用于弹丸正撞击试验。通过对四边固支的3mm厚蒙皮用12．7mm直径弹丸进行速度约60-300m／s的正撞击试验，结果表明，靶板从微小损伤到完全击穿；弹击造成的变形区有效直径随弹丸速度的增大呈幂指数趋势下降；弹击引起的变形深度随弹丸撞击速度的增加呈直线下降；靶板上的应变随弹丸速度的增加逐渐降低。弹丸剩余速度随弹丸撞击速度的增加呈直线上升。最后利用DYNA3D程序对单蒙皮及其加筋板进行了弹击数值模拟，模拟结果与弹击试验结果较吻合。
To investigate the damage evolution of a reinforced aircraft skin impacted by a projectile with diameter 12. 7 mm, LY-12 plate with thickness 3 mm and reinforced aircraft skin are shoot by the projectile. An effective testing system of simulating battle damage is experimentally developed, which consists of high pressed airgun, an assembled projectile body and bullet-shoe design, an instantaneous velocity measurement system with laser and lens, set-up frame for the specimens, and the projectile trap box. First, LY-12 CZ plates with thickness 3 mm are fixed around, and shoot by the projectile under the velocities from 60 m/s to 300 m/s. The results show that effective diameter of the deformation region by projectile impact decreases with increasing the velocity of the bullet, it follows a power law. The dynamic strain on the pate linearly decreases with increasing projectile velocity. The residual velocity of the bullet linearly rises with the velocities. Then, reinforced aircraft skins are tested by the same process as LY-12 CZ plates, the numerical simulations are performed. Comparison of the test results and numerical simulation show that the developed simulation technique is effective to simulate battle damage of the aircraft.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2006年第3期228-233,共6页
Explosion and Shock Waves
基金
航空科学基金项目(02B53008)
空军装备部预研基金项目(N2BK0515)
关键词
固体力学
损伤
数值模拟
加强蒙皮
高速气炮
solid mechanics
damage
numerical simulation
reinforced aircraft skin
high pressed air gun
作者简介
展全伟（1977-），男，硕士。
Corresponding author： GUO Wei-guo;E-mail address： weiguo@nwpu. edu. cn;Telephone： 029-88488012
