海洋结构与船舶有限元模型空间识别方法

Research on spaces detection methods of offshore structure and ship FEM model

海洋结构物与船舶进行结构强度有限元规范校核时,需要从网格数量庞大的模型中分离出空间单元,采用纯手工方式提取,操作繁琐,耗时且易漏选、错选。针对此问题本文以船舶为例,对有限元模型空间识别方法进行探索,提出"切分拼接"的方法。研究表明:先利用模型中的自由边对内部结构单元进行过滤,然后根据结构相交对模型进行切分,最后依据一定的规则将切分出来的面拼接成舱室空间的方法,能够为编程实现船舶与海洋结构物空间自动识别提供可行的方法。

During structure strength assessment of offshore structures and ships,the cabin spaces need to be derived from the numerous element models.It can be done by manual extraction.But the problem is that manual extraction is quite tedious and time-consuming.This paper is written to study the detection methods for cabin spaces based on the finite element models and the method of splitting and jointing is put forward.Research shows it is workable to follow the next steps to realize the automatic recognition of cabin spaces for programming：First,filter the internal structure by using the free edges in the model;then separate the model according to intersection segmentation between structures; finally use mosaic segmentation selected by certain rules to make cabin space.