Damage Identification by Using a Self-Synchronizing Multipoint Laser Doppler Vibrometer

Figure 6

(a) 14-point mode shapes of the cracked beams; (b) interpolated mode shapes; (c) MSCs extracted by WFR method; (d) absolute difference of MSC squares of the intact and cracked beams.

(a)

(b)

(c)

(d)