Abstract
The optimization of the ship structure with the allocation of member subjects is considered by a new calculation method in this study. FEM analysis is required for strength assessment of ship structure. The models need some nodes at the allocation of member subjects as a characteristic of FEM. When the number of member subjects changes the process of the optimization of the structure, number of nodes of FEM model is also changed. Therefore, in order to ensure consistency of mesh, it is necessary to remake FEM model. The optimization of the structure need to examine the proposition for design of many numbers. However it is difficult to create and analyze the proposition for design of many numbers in restricted time. Therefore the calculation method that doesn't depend on the number of member subjects and the allocation of member subjects is developed. The value of the displacement and stress in consideration of the influence of member subjects is acquirable by this calculation method. It will not be necessary to remake FEM model and annualize a whole structure using this calculation method. Add times Computational effort is limited to the calculation of only the structural modification by this calculation method. Therefore the optimization of the structure is considered with the allocation of member subjects and the number of member subjects. The optimization of the structure can be performed by this calculation method. The result of the calculation using this calculation method corresponds with the result of FEM. As a result, the acceptability of this calculation method is argued.
