Damage detection of composite structure using jointly response energy and continuous wavelet transform (CWT)

Aim. Xu and Wu proposed energy damage detection strategy for bridge structures^[6]. We propose combining response energy with CWT for damage detection of composite structures. Section 2 of the full paper does essentially five things: (1) it calculates respectively the response energies of the time domain responses of intact and damaged structures under steady random excitation and then analyzes the response energies with CWT method; (2) it adopts the biorthogonal wavelet function; (3) it can identify the damage of a structure by calculating respectively the differences of wavelet coefficients of the intact structure and the corresponding ones of the damaged structure; (4) it uses a lengthy procedure to determine the damage location; (5) it gives computer simulation results for two numerical examples: Fig. 2 for a composite beam and Figs. 4 through 7 for a composite plate. Section 3 presents in Fig. 10 the results of some model tests of a composite wing; they demonstrate preliminarily that our proposed method of damage location using jointly response energy and CWT can determine damage location precisely.