In Table 5, again 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 NSVR3 NSVR4 3 19 7.406 0.0008 0.0144 0.0009 0.0144 2 19 8.263 0.0022 0.0383 0.0022 0.0379 21 14 9.465 0.0056 0.0579 0.0079 0.0863 8 19 11.253 0.0053 0.0783 0.0064 0.0914 35 6 12.224 0.0357 0.1690 0.0357 0.1690 32 8 12.756 0.0193 0.1446 0.0194 0.1447 11 17 13.162 0.0087 0.0956 0.0089 0.0966 41 6 15.729 0.0238 0.1146 0.0238 0.1148 30 10 15.765 0.0075 0.0703 0.0076 0.0698 6 19 16.747 0.0039 0.0637 0.0039 0.0649 43 4 18.221 0.0536 0.1532 0.0540 0.1540 16 13 20.100 0.0143 0.1667 0.0143 0.1661 37 4 20.323 0.0408 0.1401 0.0410 0.1402 14 16 20.507 0.0104 0.1236 0.0104 0.1237 39 5 21.236 0.0394 0.1621 0.0406 0.1674 31 5 21.624 0.0385 0.1470 0.0411 0.1553 25 10 22.778 0.0116 0.0884 0.0120 0.0898 28 10 24.247 0.0067 0.0462 0.0068 0.0469 9 17 25.235 0.0072 0.0901 0.0073 0.0916 18 14 27.824 0.0124 0.1356 0.0125 0.1351 23 8 28.150 0.0180 0.1294 0.0183 0.1322 22 9 29.492 0.0238 0.1501 0.0242 0.1549 TABLE 5. Bridge Example: Modal Vector Statistics 398
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