基于CATIA V6的船舶结构有限元网格方法

CATIA作为一款通用的工业设计软件,在许多制造行业得到了广泛的应用。随着V6版本较之V5版本进一步的提升了结构模型转换FEM平面单元的能力,CATIA目前已能够实现船体结构模型直接生成有限元网格。通过深入应用CATIA V6,依靠软件强大的三维建模功能,能够极大的减少船体结构划分有限元网格工作的工时。同时利用关联设计复用以往模型,进一步提高FEM模型的生成效率。甚至能够为实现船舶结构设计CAD/CAE一体化的目标提供了具有可行性的研究路径。因而本文通过分析CATIA软件生成有限元网格机制,结合船舶结构有限元分析对生成网格的要求特点,确定了具有实践性的结构建模与网格划分方法。最后通过实践案例予以验证,结合网格质量检查与优劣势分析,基于CATIA平台为船舶结构快速生成有限元网格提供了一种较为高效的方法。

A Method for Generating Ship Structure Finite Element Mesh Based on CATIA V6

As a general industrial design software, CATIA has been widely used in many manufacturing industries. With the Ver.6 compared to the Ver.5, the ability to convert structural models into finite element meshes was further enhanced. CATIA has been able to quickly generate finite element mesh for hull structure model. Through in-depth application of CATIA Ver.6, relying on its powerful 3D modeling function, it can effectively reduce the working hours of the finite element meshing of the hull structure. Also, reuse of past models by associative design can further improve the efficiency of FEM generation. It can even provide a feasible research path to the realization of integration of CAD/CAE. In this paper, the mechanism of FEM generation by CATIA is analyzed, and combined with the finite element analysis of ship structure, the requirements of grid generation are also discussed, the practical method of structural modeling and mesh generation is determined. Finally, it is verified by practice cases, combined with grid quality check and advantage and disadvantage analysis, a method of finite element fast generation for ship structure based on CATIA platform is provided.