A ship hull model data processing algorithm for fast FEM modeling

Objective Aiming to improve the efficiency of finite element geometric modeling of ship hulls and solve the problem that ship hull models exported from ship design software cannot be directly applied to finite element geometric modeling, a geometric model processing method based on XML file data is proposed.

Methods This paper takes the ship XML file exported by AVEVA Marine (AM) software as the research object. By analyzing the data structure of the file, the data expression rules of the geometric model are clarified. According to the finite element geometric modeling specification of the ship, the geometric correction of the ship model is achieved by modifying the model data, including the deletion and simplification of components such as diagonal corners and openings, the conversion of spherical flat steel and elbow plates, and the movement of profiles and plate seams.

Results The actual application results show that the processed geometric model of the ship can be directly imported into the finite element software HyperMesh, which complies with the finite element solid geometric modeling specifications and retains relevant properties such as the original model material and plate frame thickness.

Conclusions Compared with manual modeling, the efficiency of testing segmented solid geometric modeling is significantly improved. The method proposed in this paper helps to reuse ship design models and improve the efficiency of finite element geometric modeling.