Application of the Substructure Method in Direct Calculation of Hull Structures

Abstract

To study the application of the substructure method in the direct calculation of ship hull structures, this paper uses MSC. PATRAN software for modeling. Based on the full ship model, the structure components corresponding to the units before the tail structure are deleted to form a finite element submodel that only contains the tail structure. The constraints and various design loads under each working condition are retained on the units of the tail section model. The node displacement at the “boundary” of the submodel obtained from the full ship model is used as its constraint condition to study the correctness and applicability of the finite element analysis of the tail section structure based on full ship FEA (Finite Element Analysis). Comparing the deformation and stress results of the stern of the main hull obtained from the full ship model and the tail section model, it is shown that the substructure method is correct and feasible.