블레이드형 보강재를 갖는 이방성 평판의 진동 특성

Abstract

The analysis of vibration characteristics of anisotropic plates with eccentric blade-type stiffener has been performed using finite element method based on the shear deformable plate theory for skin plate and Timoshenko beam theory for stiffener. The stiffened plates are composed of T300/5208 graphite epoxy composite laminate. The present finite element model uses nine-node quadrilateral elements for skin and three-node quadratic elements for stiffener. The analysis of the free vibration has been performed by using the subspace iteration method. To verify the accuracy of the present model. the results of this model were compared with previous results for isotropic stiffened plate and results for anisotropic stiffened plate by using plate element for stiffener. The present analysis presents the effects of the change of the stiffener size and fiber orientation on the vibration characteristics.