基于内外动力学耦合原理的船冰碰撞载荷特性研究

Research on characteristics of ship-ice collision load based on coupling internal and external dynamics

本文根据船舶碰撞的滞后性,提出了滞后系数c这一概念,并借此将船舶碰撞划分为塑性碰撞和弹性碰撞两个阶段,进而完善了船舶碰撞的算法基础;然后,利用内外动力学耦合原理首次求解出冰船碰撞过程中的恢复系数e;最终,应用中心差分法计算出该过程的冰力时历曲线以及冰船碰撞载荷的其它特性。

According to the hysteresis quality of ship collision,this paper puts forward a concept of lag coefficient,and then subdivides the process of ship collision into two stages,i.e.plastic collision and elastic collision,thus the algorithm foundation of ship collision is improved.Then,the recovery coefficient is solved for the first time by the coupling principle of internal and external dynamics.Finally,the ice force time history curve and other characteristics of the collision load are calculated by the central difference method.