Damage Identification in Structures Based on Energy Curvature Difference of Wavelet Packet Transform

Figure 10

Wavelet packet coefficients corresponding to the 16th node in case S1 in Example 1.

(a) Knot (1,0)

(b) Knot (1,1)

(c) Knot (2,0)

(d) Knot (2,1)

(e) Knot (3,0)

(f) Knot (3,1)

(g) Knot (4,0)

(h) Knot (4,1)