Design Optimization of Engine Room of Ship with Dynamic Response Using Genetic Algorithms

In this paper, the dynamic response optimization of engine room structure of ship is carried out by using the Genetic Algorithms (GAs). The static stresses and dynamic response to the external excitation are included into the constraint conditions. To save the computing storage, the floating point representation of solution in GAs is used. The operators of arithmetical crossover, boundary mutation and non-uniform mutation are introduced to improve the convergence of the GA. The effects of them are investigated. Finite element model for the static and dynamic analyses is employed in developing the Genetic Algorithm for the optimization of structural system. Modal superposition principle is used to calculate the response of the structure to the propeller excitation. The optimum results for the numerical example are presented and it shows that the GA for the dynamic response optimization is applicable.