Experimental Evaluation for the Microvibration Performance of a Segmented PC Method Based High Technology Industrial Facility Using 1/2 Scale Test Models

Table 5

Comparison of natural frequency and response magnitude by the impact test on R/P floor.

Mode	Frequency (Hz)			Response (um/Ns)
	Nonsegmented; Model	Segmented; Model	Ratio; (%)	Nonsegmented; Model	Segmented; Model	Ratio; (%)
1st	16.3	15.7	96.4	13.5	6.3	46.3
2nd	29.1	26.9	92.5	4.9	0.9	17.8
3rd	38.6	40.5	104.9	3.5	0.8	23.8