중첩원리에 기반한 박막의 스펙트럴요소를 통한 파동전파해석

초록

The non-destructive testing simulations of structure using the high frequency wave signal based on the conventional FEM has drawback due to the demand of fine mesh model, because the interpolation functions of FEM is not related to the vibrating frequency of structure. To overcome the weakness of conventional FEM analysis, this study focused on the application of spectral element model based on the superposition principle to the wave propagation analysis. Using the spectral element model of rectangular membrane developed from the previous study, the accuracy and efficiency of present spectral element analysis were investigated by comparing the results of wave propagation problem with the results of exact MAM solution and FEM analysis results.