Application of Experimental Modal Analysis to Determine Damping Properties for Stacked Corrugated Boxes

Table 2

Damping ratio calculations with band pass filter.

Damping ratio calculations with filtered Hilbert transform data 𝛿 =ln ((𝐴1sin(𝜔𝑑𝑡1))/(𝐴2sin(𝜔𝑑𝑡2)))
	Average decrement	Minimum decrement	Maximum decrement	Average damping ratio
Acceleration data	0.7266	0.6158	0.8375	𝜁 = 0.1149
Displacement data	0.7963	0.4801	1.1125	𝜁 = 0.1257