Multidisciplinary optimization of a stiffened shell under weight and frequency constraints

Multidisciplinary optimization of a stiffened shell under weight and frequency constraints

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Part of #Multidisciplinary optimization of a stiffened shell under weight and frequency constraints# :

Publishing year : 2010

Conference : The 10th Conference of the Iranian Aerospace Society

Number of pages : 5

Abstract: In this paper, firstly, the vibration analysis of a simply supported rotating stiffened cylindrical shell is performed using an energy approach which includes a variational and averaging method. The stiffeners include rings and stringers. The equations are obtained by the Reilly-Ritz method and Sander's relations. To validate the present method, the results are compared to the results available in other literature. A good adoption is observed in various types of results including isotropic shells, stiffened isotropic shells. Then, multidisciplinary optimization of parameters due to shell and stiffeners has been carried out using a design experiment (DOE) under the weight and frequency constraints. Factorial approach (as one of the DOE method) and sensitivity analysis are used to obtain the optimized contents of the variable stiffened rotating isotropic shells