船舶碰撞运动的滞后特性

船舶碰撞过程中，被撞船的刚体运动较之碰撞区的局部损伤变形而言，存在一定程度的滞后效应。本文从理论分析和数值仿真两个方面对该滞后现象进行了研究。研究结果表明：被撞船的运动滞后与撞击速度有重要关系；在高速撞击时，船舶碰撞的内、外部机理计算可相对独立地进行，而不会引起明显的分析误差。

Motion Lag of Struck Ship in Collision

The rigid body motion of a struck ship in collision is delayed to a certain extent, compared with local damage deformation of collision zone. In this paper, the motion lag of the struck ship is evaluated by a simplified analytical method based on momentum transfer analysis and also by dynamic fluid structure coupling F.E. simulation technique. It is concluded that the motion lag of the struck ship is obvious in high speed collision, and then the internal and external mechanism of ship collision can be treated separately, while collision damage of the struck ship can be analyzed on local structural model.