Maintaining Specific Natural Frequency of Damped System despite Mass Modification

Table 2

Necessary spring coefficient (N/m) and the natural frequencies.

Methods	Spring coefficient	Natural frequencies (Hz)
		1	2	3	4	5	6
Original		0.109	0.145	0.205	0.261	0.314	0.337
Real method	2.327	0.106	0.145	0.198	0.283	0.310	0.430
Optimal selection method		0.106	0.145	0.198	0.283	0.310	0.430
Absolute value method		0.106 (2.8%)	0.145 (0.0%)	0.199 (3.4%)	0.288 (8.4%)	0.310 (1.3%)	0.430 (27.6%)