Abstract
The purpose of this study is to develop the structural health monitoring system by using the bending wave propagation. We investigate the velocity of the bending wave, which is one of the characteristics of the wave propagation. In this paper, the rectangular aluminum thin plate is used in the experiment, which is a basic element of structures. The plate is excited sinusoidal at one point by the exciter, and the vibration data is measured by using two non-contact displacement sensors. The velocities of the bending wave are analyzed by wavelet transform analysis. Then we investigate the possibility of identification of damage by using bending wave propagation. As results, the velocities of the bending wave could be measured exactly by wavelet transform, and the proposal method was able to identify damage.
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