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

Table 10

Effect of lacing wire damage induced mistuning (for λ = 0.5) on natural frequencies (lacing wire at 2/3rd of blade span).

Mode	Submode	values
		= 0	= 0.2	= 0.4	= 0.6	= 0.8	= 1.0
1	I	1.8751	1.8751	1.8751	1.8751	1.8751	1.8751
	II	1.9396	1.9324	1.9227	1.9100	1.8941	1.8751
	III	2.0511	2.0364	2.0235	2.0128	2.0043	1.9978
2	I	4.6941	4.6941	4.6941	4.6941	4.6941	4.6941
	II	4.6967	4.6964	4.6960	4.6955	4.6948	4.6941
	III	4.7019	4.7012	4.7005	4.7000	4.6996	4.6993
3	I	7.8548	7.8548	7.8548	7.8548	7.8548	7.8548
	II	7.8560	7.8559	7.8557	7.8554	7.8551	7.8548
	III	7.8586	7.8583	7.8579	7.8577	7.8575	7.8573