344 E. Orlowitz and A. Brandt Fig. 36.4 Principal components of the experimental responses 0 500 1000 1500 2000 2500 10−10 10−8 10−6 10−4 Frequency [Hz] Principal Components Table 36.1 Estimated natural frequencies and damping ratios from the experimental test Mode # fn [Hz] n [%] 1 140:533 3:479 2 141:588 3:335 3 319:717 3:013 4 388:531 3:034 5 405:072 2:708 6 500:982 2:551 7 580:990 3:286 8 711:052 2:298 9 793:589 2:813 10 935:535 2:871 Fig. 36.5 Auto MAC matrix for the experimentally estimated mode shapes 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 0 0.5 1 10 1.5 Auto MAC matrix 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
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