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

Figure 6

Relationship between ADR ζ_sd and the frequency ratio Ω/ω: (a) α = 0.30; (b) α = 0.50; (c) α = 0.70; (d) α = 0.90.

(a)

(b)

(c)

(d)