基于内聚力接触法的船舷侧-平整冰相互作用数值模拟

Numerical Simulation of Interaction between Ship Broadside and Flat Ice Based on Cohesive Surface Interaction Method

针对极地航行船舶与平整冰碰撞挤压的典型场景,采用内聚力接触法模拟平整冰与舷侧碰撞发生挤压破坏的过程,构造粗糙化单元表面模拟冰与结构物表面的非同时接触,选取均匀化冰体单元描述冰的微裂纹扩展和挤碎的过程。在此基础上,分析不同碰撞场景下舷侧局部载荷的分布规律,并对舷侧结构变形和吸能结果进行分析。仿真结果表明:局部载荷的大小与碰撞速度的关联性不强;在平整冰与舷侧碰撞过程中,纵骨对结构抵抗外载荷并保持稳定的贡献较大。

In view of the typical situation of collision and extrusion between polar navigation ships and flat ice.Based on the cohesive surface interaction method,the process of extrusion damage of flat ice and side collision is simulated.The non simultaneous contact between ice and structure surface is simulated by constructing rough element surface.The uniform ice body element is selected to describe the microcrack propagation and crushing process of ice,then,the distribution of the local load on the broadside under different collision scenarios is analyzed,and the deformation and energy absorption results of the side structure are analyzed.The simulation results show that the local load value is not related to the collision speed,and the longitudinal contributes a lot to the stability of the structure to resist the external load during the collision.