Dynamic Analysis of One- and Two-Dimensional Structures Using Spectral Element Method

초록

Structural dynamics has become an important reasearch subject in engineering during last decades. Accordingly, many structural analysis methods exists. Finite element method (FEM) is certainly one of the most popularly used methods. However, it is well known, in FEM, that sufficiently large number of finite elements must be used so as to obtain reliable dynamic responses of a structure, especially at high frequency. Furthermore, the modal analysis, usually used in combination with FEM, is limited to the frequency regimes where relative spacing of natural frequencies remains large compared to the relative parameter uncertainty [1]. Thus, alternatives to modal analysis of linear structural dynamics, applicable to the high frequency regime, have been considered by many researchers including acousticians [2].