Analysis of Nonlinear Vibration of Hard Coating Thin Plate by Finite Element Iteration Method

Table 2

The first 8 nature frequencies and damping ratios of uncoated plate obtained by experimental test.

Modal order	1	2	3	4	5	6	7	8
Nature frequency (Hz)	46.8	132.6	289.4	473.4	535.4	824.9	919.2	995.3
Damping ratio (%)	0.80	0.19	0.04	0.03	0.04	0.07	0.05	0.04