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

Table 9

Effect of lacing wire damage induced mistuning (for λ = 0.25) 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	1.9082	1.9044	1.8994	1.8928	1.8847	1.8751
	III	1.9694	1.9611	1.9538	1.9478	1.9431	1.9396
2	I	4.6941	4.6941	4.6941	4.6941	4.6941	4.6941
	II	4.6954	4.6952	4.6950	4.6948	4.6945	4.6941
	III	4.6980	4.6976	4.6973	4.6970	4.6968	4.6967
3	I	7.8548	7.8548	7.8548	7.8548	7.8548	7.8548
	II	7.8554	7.8553	7.8552	7.8551	7.8549	7.8548
	III	7.8567	7.8565	7.8563	7.8562	7.8561	7.8560