Crack Detection of Fan Blade Based on Natural Frequencies

Table 4

Third natural frequency ratio () as a function of crack location and crack size for the blade.

	0.3408	0.3463	0.3426	0.3415	0.3450	0.3455	0.3458	0.3489
	0.3123	0.3221	0.3254	0.3287	0.3310	0.3357	0.3391	0.3454
	0.2947	0.3141	0.3164	0.3165	0.3209	0.3225	0.3365	0.3432