内爆炸作用下舰船多舱室破坏的数值模拟

内部爆炸条件下爆炸波受舱室壁面多次反射叠加作用，其破坏作用大大加强，破坏机理也与空中（自由场）爆炸有明显区别。对内部爆炸作用下舰船多舱室结构的破坏效果进行数值模拟分析，结果表明：舰船十字形舱室的舱壁和甲板对爆炸能量具有导向作用，爆轰产物压力分布与破坏范围均呈比较明显的十字形分布；内爆炸作用下爆点所在舱室的舱壁可能发生整体冲切破坏，在爆轰产物推动下，冲切破坏的舱壁能够达到较高的飞行速度，并在飞行过程中对相邻舱壁造成碰撞破坏；具有泄爆孔和外侧加强筋的舱壁其破坏程度可有效降低，而内侧加强筋对舱壁则无加强效果，同无配筋情况相比，设内侧加强筋的舱壁的破坏程度要稍大。

Numerical simulation of ship multi-cabin structure damage under internal explosion

Internal explosion wave is the reflection of initial wave and interaction of the reflected waves by the inner surface of the deekhouse in ship, the damage effect is more serious than explosion in free air, and the damage mechanism is different, too. In this paper, numerical simulation is performed to investigate the internal explosion damage effect on the multi-cabin structure. The results show that in the vertical intersecting cabin, the pressure and damage range distribute in an obvious vertical intersecting form. The results also show that the wave mainly produces the cabins＇ overall failure, which is tearing failure at comers with large plastic deformation. The failure cabin under explosion pressure can reach very high velocity, and it can result in serious damage to neighboring cabins. Further investigation shows that the cutout and the outside stiffener steel can effectively reduce the damage of the cabin. However, the damage of the cabin with inside stiffener steel is more serious than the cabin without stiffener steel.