The following (Tables 1, 2, and 3) provide a summary of the statistical information evaluated on the C-Plate test structure. Note that in Table 1 that there is little difference in the complex modal frequency estimated from the most significant pole weighted vector (columns 3 and 4) when compared to the mean values of the complex portions of the modal frequency (columns 5 and 6). Index Sample Size (N) Frequency (Hz) Damping (Hz) Frequency (Hz) Damping (Hz) Std. Dev. (Hz) (Mean) (Mean) 8 16 362.564 -3.1666 362.564 -3.1670 0.1677 19 16 363.860 -3.5650 363.860 -3.5650 0.1251 10 16 557.055 -2.8966 557.055 -2.8966 0.0795 12 16 761.224 -5.2229 761.224 -5.2229 0.1008 2 17 764.190 -2.5371 764.190 -2.5371 0.1529 16 16 1222.980 -4.0883 1222.980 -4.0883 0.0271 13 16 1224.055 -3.9540 1224.055 -3.9540 0.0419 4 17 1328.036 -6.6495 1328.036 -6.6507 0.0907 17 16 1328.803 -5.4761 1328.803 -5.4768 0.1871 6 17 2019.269 -8.2512 2019.271 -8.2511 0.2543 23 15 2023.802 -7.5597 2023.801 -7.5598 0.0642 26 10 2321.862 -3.9074 2321.860 -3.9070 0.1690 28 8 2322.335 -3.8356 2322.335 -3.8367 0.2244 22 15 2337.895 -3.7967 2337.895 -3.7971 0.2287 TABLE 1. C-Plate Example: Modal Frequency Statistics In Table 2, note that the fraction of normalized residual (columns 4-7) are all quite small indicated that only one mode has been found in each cluster and that the modal vectors in the cluster were essentially the same modal vector with minimal differences (noise). Index N Frequency (Hz) NMVR1 NMVR2 NSVR1 NSVR2 8 16 362.564 0.0046 0.0730 0.0046 0.0730 19 16 363.860 0.0034 0.0543 0.0034 0.0543 10 16 557.055 0.0001 0.0014 0.0001 0.0014 12 16 761.224 0.0007 0.0092 0.0007 0.0093 2 17 764.190 0.0020 0.0312 0.0020 0.0312 16 16 1222.980 0.0017 0.0213 0.0017 0.0213 13 16 1224.055 0.0013 0.0185 0.0013 0.0184 4 17 1328.036 0.0042 0.0718 0.0042 0.0717 17 16 1328.803 0.0022 0.0342 0.0022 0.0342 6 17 2019.269 0.0054 0.0763 0.0054 0.0763 23 15 2023.802 0.0047 0.0537 0.0047 0.0537 26 10 2321.862 0.0162 0.1617 0.0162 0.1617 28 8 2322.335 0.0161 0.1279 0.0161 0.1278 22 15 2337.895 0.0020 0.0238 0.0020 0.0238 TABLE 2. C-Plate Example: Modal Vector Statistics 392
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