Nonlinear Vibration of the Blade with Variable Thickness

Table 1

Frequency comparison.

	1^st			2nd
	C-R	FEM	EX	C-R	FEM	EX
Bardell et al. [21]		4.31	4.5		8.58	8.9
Ye et al. [36]	4.27			8.20
Present	4.26	4.33		8.21	8.59