Model-Based Dynamic Structural Modification of Machine Tools

Table 4

Modal frequencies for eight first modes. Comparison of achieved results.

Mode	Frequency [Hz]
	Without additional mass	With additional mass	With additional mass
1st	71.88	71.61	63.32
2nd	110.20	103.10	71.93
3rd	154.70	148.30	96.71
4th	192.50	177.00	142.80
5th	207.30	192.80	192.50
6th	269.70	205.90	203.90
7th	277.10	274.10	278.10
8th	301.20	278.00	278.60