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

Table 10

Dynamic frequencies and modal damping ratios of the blade with different rotating speeds.

Rotational speed/rpm	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	247.34		989.5		1162.8	1.26
10000	377.15		1182.5		1614.2
20000	619.86		1652.1		2542.2
30000	882.34		2224.8		3587.6
40000	1149.3		2835.5		4666.7
50000	1417.3		3462.0		5756.4
60000	1685.3		4095.1		6848.2