Stress analysis of the opening area of the ship integrated superstructure based on surrogate models

The strength of the opening area of a ship integrated superstructure is investigated in this paper by using the ANSYS software. A simplified FEM model considering both simulation accuracy and computational expense is developed based on the comparison between the results of several FEM models. Based on this simplified FEM model,four kinds of surrogate models that are used to efficiently predict the corner stress of the opening area of the integrated superstructure are constructed. Meanwhile,error tests of these four surrogate models are carried out, and the results indicate that Kriging model performs best in terms of fitting accuracy among the four models. Finally, the influences of three different major structure sizes on the stress of the opening area is discussed, where it is concluded that the thickness of the plate has the greatest effect on the corner stress of the opening area.