Structural optimization of composite sandwich panels with steel stiffeners based on RSM-NCGA algorithm
A composite sandwich panel with steel stiffeners is used to reduce the weight of the superstructure of the large cruise ship.The 3D Hashin failure criterion and the stiffness matrix degradation method are used to conduct the finite element analysis of progressive damage to reveal the failure mode.The structure is modeled based on ABAQUS secondary development.Using the optimized Latin hypercube design sampling in DOE test design,a quartic polynomial response surface proxy model is established according to the sampling points.The structural mass and ultimate load are used as optimization objective functions in the response surface agent mod-el,the multi-objective optimization of composite sandwich panel with steel stiffeners is carried out based on NC-GA genetic algorithm.The results show that the mass of the optimized results is reduced by 12.05％and the ulti-mate bearing capacity is increased by 17.43％.The hybrid optimization strategy of DOE experiment design and genetic algorithm can be applied to different problems in the composite sandwich panel with steel stiffeners.
large cruise shipcomposite materialprogressive damagemulti-objective optimization
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