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

Table 4

Comparison of natural frequency and modal loss factor for two structures.

	Natural frequency (Hz)			Modal loss factor (%)
	1st	2nd	3rd	1st	2nd	3rd
Full coverage	380.66	386.88	658.62	0.437	0.421	0.194
Topo results	380.37	386.61	658.73	0.355	0.322	0.191
Change rate	0.01%	0.01%	0.01%	18.8%	23.5%	1.5%