STUDY ON DAMAGE DETECTION TECHNIQUE FOR PLATE STRUCTURES IN THE SPACE AND WAVE-NUMBER DOMAIN

Abstract

This study proposes a damage detection technique in the space and wave-number domains. A tone burst force is input to a structure at one point and the acceleration responses are measured at gridiron points. If the damage is inside the grid, the position of damage is detected from the contour of the acceleration power in the space domain. If the damage is outside the grid, its position is detected in the wave-number domain through the 3D and 2D Fourier transforms. Numerical analysis was carried out on a plate structure, and the effectiveness is verified.