Dynamic Optimization of Constrained Layer Damping Structure for the Headstock of Machine Tools with Modal Strain Energy Method

Table 3

Comparison of natural frequency and response amplitude for two structures.

	Natural frequency (Hz)			Response amplitude ((m/s^2)/N)
	1st	2nd	3rd	direction	direction	direction
Original structure	852	863	1133	55	14.0	16.5
Hybrid structure	846	861	1123	7.8	5.2	3.0
Change rate	0.7%	0.2%	0.9%	86%	63%	82%