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 sinusoidally 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 calculated by wavelet transform analysis. As a results, the velocities of the bending wave were able to be measured exactly by wavelet transform.
