Analytical and Numerical Investigation of Lacing Wire Damage Induced Mistuning in Turbine Blade Packet

Table 2

Comparison of natural frequencies obtained analytically and FEM.

Mode	Submode	Frequency in Hz (analytical)	Frequency in Hz; (FEM)	% error
1	I	72.52	73.15	0.87
	II	75.94	76.56	0.80
	III	82.32	82.90	0.71
2	I	454.45	458.04	0.78
	II	455.00	458.60	0.78
	III	456.14	459.73	0.78
3	I	1272.45	1284.90	0.97
	II	1272.63	1285.10	0.97
	III	1273.06	1285.50	0.97

The % error in the results of natural frequencies in the submodes of three bending modes of vibration obtained with both methods is less than 1%.