SPECTRAL FINITE ELEMENT METHOD FOR SOLVING DYNAMIC RESPONSE OF PLATES SUBJECTED TO MOVING LOADS AND AXIAL FORCES

In this paper, the spectral element method will be developed for thin plates subjected to the moving loads and axial forces. In this method, Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) are utilized to obtain displacements in time domain and natural frequencies. The exact shape functions and dynamic stiffness matrix in frequency domain are extracted. The natural frequencies of the thin plate, computed by spectral element method are compared with frequencies, computed by other numerical methods.