摘要
通过对典型半穿甲导弹打靶实验中舰艇结构破坏模式的观察,结合数值模拟,分析了舱内爆炸载荷的特征以及舱内爆炸下舱室板架结构的失效模式。结果表明,舱内爆炸下,舱室板架结构承受的冲击载荷及失效模式与敞开环境爆炸下加筋板结构承受的冲击载荷及失效模式有较大区别,其动态响应难以用敞开环境爆炸下加筋板结构的动态响应描述;舱内爆炸载荷主要有壁面反射冲击波、角隅汇聚冲击波以及准静态气体压力,其中两壁面和三壁面角隅汇聚冲击波的强度分别为相同部位壁面反射冲击波强度的5倍和12倍以上;舱室板架结构主要有4种失效模式,其中模式Ⅲ、Ⅳ较常发生;舱室板架结构加强筋布置在迎爆面将使板架中部的局部破坏程度增加,但有利于削弱角隅汇聚冲击波强度,减小板架沿角隅部位的撕裂破坏。
The failure mode of ship structure attacked by typical semi-armour-piercing missile in target practice experiment was analyzed. The characters of internal explosion load and the failure mode of gross panel of the cabin were studied by numerical simulation. Results show that the explosion loads and the failure modes of the gross panel under explosion inside a cabin have many differences from under explosion in an open area; the dynamic response of the gross panel under explosion inside a cabin can not be simulated under explosion in an open area; the explosion loads acting on the gross panel inside a cabin, include reflected shock wave, converged shock wave on the corner, and the quasi-static pressure. Intensities of converged shock wave on the corners of two gross panels and three gross panels are 5 and 12 times larger than that of the reflected shock wave respectively. The gross panels of a cabin have 4 failure modes, under internal explosion loads, in which mode Ⅲ and Ⅳ are most frequent. The stiffeners of the panels placed on the blast side can enhance the local damage, but can weaken the converged shock wave on the corner, and decrease the tearing damage on the corner.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2007年第2期151-158,共8页
Explosion and Shock Waves
关键词
爆炸力学
失效模式
有限元分析
爆炸载荷
舱室结构
mechanics of explosion
failure mode
finite element method
blast load
cabin structure
