夹层板改善单舷侧散货船耐撞性能的数值模拟分析

摘要

The bow of a ship colliding directly to another ship's amidships is the worst situation in ship-ship collision.In order to improve the crashworthiness of the ship, the sandwich material, such as honeycomb sandwich plate, tube-style sandwich panels, folding sandwich plate etc.can be filled in the side of the single-hull bulk carrier to increase the energy absorption capacity of side structure.The damage deformation, the critical collision speed as well as the energy absorption of improved side structure filled with sandwich are compared with the conventional type of side structure under lateral dynamic loads by MSC/Dytran.The results indicate that the improved side structure filled with sandwich can remarkably improve the side structure's ability against collision, and the effect of the tube-style sandwich panels structure is best whose upper skin is the main energy-absorbing compo-nent.%船舶碰撞事故中船艏对船中垂直碰撞是最为危险的情形，为提高船舶的防撞性，在单层壳舷侧填充夹层（蜂窝式夹层板、圆管式夹层板、折叠式夹层板等）以提高舷侧结构的能量吸收能力。利用有限元仿真软件MSC／Dytran对改进的夹层板舷侧结构及常规舷侧结构在横向冲击载荷作用下的变形损伤、能量吸收及极限撞击速度进行对比分析。数值仿真结果表明，改进的夹层板结构显著提高了舷侧结构的耐撞能力，是一种先进的船舶防护结构形式，且圆管式夹层板结构最理想，上蒙皮为其主要吸能构件。