Collaborative Optimization of Container Ship on Static and Dynamic Responses

A new improved collaborative optimization (CO) model is used to optimize a container ship structure on static and dynamic responses. The new CO model provides solution capabilities for multiobjective multidisciplinary optimization problems. The system level objective function is advised to minimize relative value between the global optimal solution and the single disciplinary optimal solution. The subsystem level objective function is advised that includes the disciplinary objective function and the modified consistency constraint. The discrete design variable sets including the thickness of plate and the model number of beam are depicted with matrix. The objective functions are how to get the minimum structural mass in the static analysis and how to minimize the maximum acceleration of structure in the dynamic analysis. The proposed model was demonstrated with an optimization problem of stiffness plate under static and seismic loading. Then the model was used to optimize a container ship structure. The optimal design obtained indicates the great potential of decreasing structural mass and vibration level and increasing natural frequency reserve under the strength and stiffness requirements. The analysis progress and results show that the model is feasible and well-suited for using in actual optimization problems of ship design