Dynamic Characteristics of Blade with Viscoelastic Damping Block Based on Complex Eigenvalue Method

Table 8

Natural frequencies and modal damping ratios of the blade with different storage modulus.

Storage modulus/Mpa	First order		Second order		Third order
	Natural frequency/Hz	Modal damping ratio/%	Natural frequency/Hz	Modal damping ratio/%	Natural frequency/Hz	Modal damping ratio/%
500	247.34		989.49		1162.6
700	241.86		967.59		1136.9
1000	236.56		946.40		1112.0
2000	231.44		925.90		1087.9
3000	226.48		906.06		1064.6
4000	221.68		886.85		1042.0