接水防撓パネルの固有振動数推定法に関する研究 : 簡易推定法の導出とニューラルネットワークを用いた推定精度向上について

概要

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It is well known that many design candidates will be under consideration in optimization processes of ship structures with Genetic Algorithm. Since a Finite Element Analysis requires a lot of computational resources, it is difficult to examine the structural strength of these design candidates. Hence, a simple but accurate method is desired. In this paper, the natural frequency of the stiffened plate in cooperating with added mass effects is under investigation. A conventional equation for estimating the natural frequency is proposed based on the energy method. The Neural Network is also introduced here in order to improve the accuracy of the solution. Good agreement of solutions between the proposed method and Finite Element Method is observed in the numerical example.