船舶抗冰碰撞舷侧结构加强方案及优化设计

本文介绍了船-冰碰撞数值仿真中涉及的关键技术,以船舶肩部舷侧区域与棱角冰发生碰撞作为计算工况,对所选船舶舷侧与冰体碰撞进行数值仿真,根据舷侧响应特征指出其进行结构加强的必要性.由此提出几种舷侧常规加强方案,通过分析各自与冰体接触区域船体外板上受到的平均应力以及碰撞过程中船体结构发生塑性破坏的程度,指出结构仍然存在的问题以及后续加强的方向.最后,设计了2种新型舷侧结构并对其进行优化,验证了其具有较优的抗冰碰撞性能,得到了抗冰碰撞舷侧结构设计的相关结论.

Strengthening method and optimization design for a ship′s side to resist ice collision load

In this paper, key technique used in numerical simulation of ship-ice collision was introduced, the collision between the side of a ship's shoulder and angular ice was taken as computation condition, the necessity for structure strengthen was pointed out in view of the response of its side. Several conventional strengthening methods were proposed on this basis, the mean stress that hull plates in contact region received and the degree of plastic damage of hull structure are contrasted respectively, the problem that still existed and the direction for subsequent strengthening were stated. Finally, two new side structures were designed, one of them was optimized and whose fine performance in resisting ice collision load was verified, relevant conclusions about structural design of ship's side in resisting ice collision load were obtained.