面向船舶吊装工艺安全评估的有限元快速建模方法研究

Research on finite element fast modeling method for safety assessment of ship lifting process

分段吊装是船舶建造中的一项重要工艺,为精准模拟船舶吊装作业过程中眼板结构节点的应力分布,在船舶吊装有限元强度计算时眼板区域需进行细网格计算.基于由几何方法添加辅助硬点并生成过渡单元的思路,提出了一种眼板有限元细网格快速生成方法.在粗网格的基础上,将眼板几何模型进行网格细化并根据布置位置与粗网格相连接.基于HyperMesh二次开发,编制了实用可靠的程序,提高了眼板的建模计算效率.

Segmental lifting is an important process in ship construction.In order to accurately simulate the stress distribution of the node of the lugs structure in the process of ship lifting,fine mesh calculation of the lugs area should be carried out in the finite element strength calculation of ship lifting.Based on the idea of adding auxiliary hard points by geometric method and generating transition elements,a rapid finite element fine mesh generation method for lugs is proposed.On the basis of the coarse mesh,the mesh of the geometric model of lugs is refined and connected with the coarse mesh according to the layout position.Based on the secondary development of HyperMesh,a practical and reliable program is compiled to improve the modeling calculation efficiency of lugs.