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

Table 1

Measured natural frequencies of the three beams.

	(Hz)	(Hz)
Intact beam	105.6	663.6
Cracked beam ( = 0.4)	103.3	637.7
Cracked beam ( = 0.5)	104.1	633.2