Analysis of Free Vibration and Damping Characteristics of a Composite Plate by Using Modified 3-Dimensional 16-Node Elements

수정된 3차원 16절점 요소에 의한 복합재 판의 자유진동 및 감쇠특성 해석

A modified 16-node element for composite plate has been proposed and compared with the 20-node element to check the validity of it. The fields of numerical inspection include mode analysis and specific damping analysis. By symetrizing the conventional unsymmetric damping matrix in the analysis of specific damping capacity, we could compute the specific damping capacity and make a program, effectively. In addition, we could predict the errors caused by reduction of integration order in thickness direction depending upon the number of layers.