Research Article

A New Method to Calculate Additional Damping Ratio considering the Effect of Excitation Frequency

Figure 9

ADR (ζsd) vs. frequency ratio (Ω/ω): (a) α = 0.30; (b) α = 0.50; (c) α = 0.70; (d) α = 0.90.
(a)
(b)
(c)
(d)