EEMD-MUSIC-Based Analysis for Natural Frequencies Identification of Structures Using Artificial and Natural Excitations

Table 1

Results of identified natural frequencies with different methodologies.

Reference values	EEMD			DWT
	HT	FFT	MUSIC	HT	FFT	MUSIC
𝑓1=0.61	0.72*	0.68*	0.61	0.70*	0.72*	0.61
𝑓2=0.73			0.73			0.78
𝑓3=1.56	1.54	1.52	1.56	1.31	1.55	1.56
𝑓4=4.35	4.38	4.30	4.34	4.41	4.38	4.37

∗Mixed modes.