비균질 탄성 기초위에 놓여있는 직사각형 평판의 고유 진동수

Natural Frequency of a Rectangular Plate on Non-homogeneous Elastic Foundations

The natural frequencies of a rectangular plate on non-homogeneous elastic foundations were obtained by using the Ritz method and Galerkin method. The results of both methods using the different type of trial functions were also compared. Furthermore, the effects of the variation of boundary conditions, the stiffness of the foundation spring, the dimension ratio of the plate were investigated. As a result, the Galerkin method can be used to obtain the accurate solution and can be effectively used to design the foundation bed.