PROBLEM TO BE SOLVED: To provide a reliability optimization method of plate and shell structure with a reinforcement rib in consideration of pluralistic uncertainty.;SOLUTION: The reliability optimization method of plate and shell structure with a reinforcement rib in consideration of pluralistic uncertainty includes: performing reliability optimization of plate and shell structure with a reinforcement rib using an equivalent rigidity model; verifying each elite individual of a candidate solution set by means of finite element analysis, in which a single point perturbation weight method is used, a defect element is taken into consideration, nonlinear post-buckling analysis is performed with respect to plate and shell structure with a reinforcement rib having a defect, and an elite individual satisfying a reliability constraint condition is selected; and performing reliability optimization with respect to the plate and shell structure with a reinforcement rib using a finite element model. Efficiency of reliability optimization of plate and shell structure with a reinforcement rib is significantly increased and a calculation cost is reduced.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT
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