Crack Detection of Fan Blade Based on Natural Frequencies

Table 2

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

	0.9271	0.9340	0.9366	0.9425	0.9435	0.9467	0.9476	0.9515
	0.8712	0.9024	0.9121	0.9255	0.9359	0.9430	0.9474	0.9505
	0.8002	0.8845	0.9045	0.9132	0.9338	0.9149	0.9472	0.9498