液货晃荡对双壳油船碰撞性能的影响研究

Study on the effect of collision of double-hull oil tanker to liquid sloshing

利用ANSYS/LS-DYNA分析载货情形下的双壳油船发生碰撞导致舱内液货发生晃荡时,晃荡载荷对舷侧结构碰撞性能的影响,并将所得结果与空载状态下的碰撞事故进行比对,发现液体晃荡对碰撞性能的影响主要体现在当撞击船接触到被撞击船内壳时,舱内液体动能较大,对碰撞性能产生显著影响,舱内液货能有效吸收撞击船的撞击能量,使得撞击速度快速下降,同时由于舱内液货与舱壁之间的耦合作用,使得碰撞力增大,导致内壳受损更为严重,造成内壳提前破裂。

The ANSYS/LS - DYNA was used to study the effect of sloshing load on ship-ship collision which resulted in liquid cargo sloshing. Compared with the light condition, the influence of liquid sloshing on the impact performance is found mainly reflected in the impact when the sticking ship had been attached to the struck ship＇s inner shell with large kinetic energy of liquid. A significant impact on the performance of the collision shows that the liquid cargo could effectively absorb the impact energy of the striking ship, which made the collide velocity decreased rapidly. At the same time, due to the coupling of liquid cargo compartment and the bulkhead between the collision force, the increased collision damaged the inner shell seriously, resulting the shell ruptured in advance.