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

Table 9

Natural frequencies and modal damping ratios of the blade with different loss factors.

Loss factor	First order		Second order		Third order
	Natural frequency/Hz	Modal damping ratio/%	Natural frequency/Hz	Modal damping ratio/%	Natural frequency/Hz	Modal damping ratio/%
0.5	247.34		989.57		1163.8
0.7	241.87		967.66		1138
0.9	236.57		946.47		1113.1
1.1	231.45		925.97		1089
1.3	226.49		906.13		1065.6
1.5	221.68		886.92		1043