舷侧水对船舶抗碰撞性能的影响

In order to evaluate the anti-collision characteristics of a side tank impacted by a large object, the anti-collision performances of the outer side shell and the inner side shell under different impact velocity and tank waterlines were analyzed on the basis of the finite element method and the simplified theory method. The results show that the water can significantly enforce the anti-collision performance of the double-side structure, but the increasement is limited, and the water affects weakly the failure of the outer shell, but which has a great influence on the broken reaction force of the inner side shell. When the velocity of the bulbous bow gradually increases, the broken reaction forces of the outer side shell and the inner shell gradually increase, but the increasing rates tend to be gentle gradually, and the increasing rate for the broken reaction force of the outer side shell tends to be gentle faster than that for the inner side shell. And the analysis on different tank waterlines shows that, when the waterline of the side tank is above the impacted stong frame, the anti-collision characteristics are less affected. When the waterline of the side tank is below the impacted strong frame, the anti-collision characteristics of the side outer shell are less affected, but the waterline has a great influence on the anti-collision characteristics of the inner side shell, and the differences increase corresponding to different waterlines with increasing the collision velocity of the bulbous bow.