Two-Degree Vibration Analysis of a Horizontal Axis Turbine Blade by Finite Differential Methods

Table 1

Natural frequencies with variable finite difference nodes.

Number	6	10	16	30	50
ω1	0.358907	0.378943	0.385872	0.385882	0.385887
ω2	1.423122	1.234436	1.229124	1.229131	1.229135
ω3	2.564390	2.379256	2.353636	2.353641	2.353639
ω4	4.563212	4.136932	4.236893	4.236887	4.236885
ω5	8.536790	7.315466	7.414138	7.414123	7.414121
ω6	12.34890	10.06764	10.98524	10.98518	10.98519