이동하중을 받는 3차원 보에 대한 스펙트럴요소 및 유한요소 해석

초록

In this study, a frequency domain three-dimensional(3-D) spectral element method(SEM) for the moving line force-induced dynamic responses is proposed. 3-D SEM is developed by using the spectral element in the longitudinal direc-tion(x-direction) to reduce the number of degrees of freedom for improving the computational efficiency of solutions. By using the finite element method in the cross-section, it is possible to consider cross-section deflection which over-comes the weakness of one-dimensional(1-D) SEM. The proposed 3-D SEM is verified by the comparison of natural frequencies and dynamic responses of existing modal analysis method(MAM), 1-D FEM, 3-D FEM, 1-D SEM, and ANSYS which use transient dynamic analysis with BEAM3 and SOLID45