Identification of Loss Factor of Fiber-Reinforced Composite Based on Complex Modulus Method

Table 1

The first 8 natural frequencies and damping ratios of composite thin plate obtained by experiment.

Modal order	1	2	3	4	5	6	7	8
Natural frequency (Hz)	139.8	270.3	397.3	730.9	867.9	980.5	1035.2	1205.9
Damping ratio (%)	1.06	0.25	0.61	0.33	0.52	0.24	0.49	0.56