128 R. N. Coppolino Fig. 13.3 Parametric Sensitivity of Cylindrical Shells welded to Thick Bulkheads 101 100 Modal Damping from ISS P5 and ISPE Tests and the “Proportional Damping Curve Fit” 10–1 10–2 15 20 25 30 ISS P5 (TSS2) ISPE SFD-2018 Prop Damp Curve Fit 35 40 Frequency (Hz) Zeta (%) 46 50 55 60 65 Fig. 13.4 Illustration of the Fallacy of Rayleigh Proportional Damping
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