Identification of wave propagation on Beam using High order time frequency

초록

The wave propagation in solid is an interesting topic to the mechanical engineering since it often gives an idea for the structure damage. However it is often difficult to measure the wave propagation in beam due to the difference of speed of wave depending on frequency. In order to solve this problem, many time-frequency methods have been developed. Especially Wigner-Ville distribution, Wavelet analysis and short time frequency analysis are recently popular methods in this field. These methods have advantages and disadvantages depending on the type of structure. In this paper, we introduce the higher order time-frequency method for the better identification of wave propagation than these methods. It is can be applied to the damage analysis of the structure in detail.