Identifying the Mechanical Parameters of Hard Coating with Strain Dependent Characteristic by an Inverse Method

Table 6

The 6th order resonant frequencies, resonant responses, and modal damping ratios of uncoated and coated plate under different excitation levels.

Excitation level (g)		1	2	4	6
Uncoated plate	Resonant frequency (Hz)	1297.08	1297.00	1297.00	1297.05
	Resonant response (μm)	13.5	31.4	68.1	96.3
	Modal damping ratio (%)	0.11	0.11	0.11	0.11
Coated plate	Resonant frequency (Hz)	1263.13	1261.88	1259.13	1258.13
	Resonant response (μm)	6.3	12.0	22.8	33.1
	Modal damping ratio (%)	0.25	0.26	0.27	0.28