制导炸弹连续打击下混凝土重力坝的破坏效应  

Damage effect of a concrete gravity dam under continuous attacks of guided bombs

作　　者：李本平[1] 

机构地区：[1]第二炮兵指挥学院,湖北武汉430012

出　　处：《爆炸与冲击》2010年第2期220-224,共5页Explosion and Shock Waves

摘　　要：选取某制导炸弹作为研究对象,利用任意Lagrange-Euler计算方法,通过对大口径、高弹重武器的侵彻爆炸的全过程三维数值仿真,针对连续打击作用下大坝破坏效应进行了研究。研究表明,侵彻引起的振动很小,引起质点振动的主要是弹药的爆炸。由于相继打击间隔时间已远超过大坝动态响应时间,相继打击引起的坝体振动基本上不存在叠加效应。但前枚制导炸弹侵彻爆炸的破坏效应为后继制导炸弹提供了"临空面",使得后继制导炸弹无论是侵彻深度还是爆炸破坏范围等破坏效应都有所增大。连续打击下,爆炸后形成的破坏范围基本上互相连通,对大坝的正常运行及安全构成威胁。Guided bombs were taken as the research objects to numerically simulate the penetration and explosion process of large-aperture-heavy weapons by using a three-dimensional arbitrary Lagrange-Eulerian （ALE） code and to explore damage effects of a roller compacted concrete gravity dam under continuous attacks of two precision-guided bombs. Results show that the vibration caused by penetration is weak, while the particle vibration is mainly caused by ammunition explosion. The intermission time of sequential attacks is far longer than the dynamic response stretch of the dam, and the dam vibration caused by sequential attacks scarcely takes on the superposition effect. But the damage effect of penetration and explosion for the former missile provides the freedom surface for the subsequent missile, and the penetration depth and explosion-damaged range of the subsequent missile increase. The explosion-damaged ranges basically connect with each other, which threat to the normal running and security of the dam.

关 键 词：爆炸力学 破坏效应 任意Lagrange-Euler方法 混凝土重力坝 连续打击 制导炸弹 

分 类 号：O383.2[理学—流体力学]