Ship hull model data processing algorithm for fast FEM modeling

Abstract

ObjectiveIn order to improve the efficiency of the finite element geometric modeling of hulls, to address the problem in which hull geometry models exported by ship design software cannot be directly used in finite element modeling，this study propose a geometric model processing method based on the XML file data.MethodsAn Extensible Markup Language (XML) file of a hull exported by AVEVA Marine (AM) software is taken as the research object. First, the data expression rules of the geometric model are clarified through the analysis of the data file structure. Then, on the basis of the hull finite element modeling specifications and model data modification, the proposed algorithm can automatically delete and simplify components such as notches and holes, convert bulb flat and brackets, and move profiles and plate seams.ResultsThe processed hull geometry model can be directly imported into finite element software HyperMesh, which complies with the finite element modeling specifications and retains the original model material, plate frame thickness and other related attributes. ConclusionsCompared with manual modeling, the efficiency of testing segmented solid geometric modeling is significantly improved. The proposed method can enable the reuse of ship design models and improve the efficiency of finite element geometric modeling.

Keywords

• fast finite element analysis
• hull model
• model data
• data conversion
• xml format
• aveva marine software