Minimization of Ground Vibration Test Configurations for F-16 Aircraft by Subtractive Modification

Table 11

Natural frequencies for configuration 2 vs. configuration 4.

Mode	Initial model frequency (Hz)	Target model frequency (Hz)	% relative error
1	3.71	3.76	1.35
2	4.86	4.90	0.83
3	5.21	5.30	1.54
4	5.50	5.60	1.81
5	7.74	7.79	0.52
6	8.50	8.43	0.84
7	8.71	8.85	1.61
8	8.97	9.04	0.67
9	9.51	9.87	3.60
10	9.75	10.54	7.52
11	10.16	11.01	7.66
12	10.76	11.16	3.55
13	11.45	11.51	0.44
14	11.56	11.90	2.90
15	12.24	12.20	0.33
16	13.26	12.78	3.82