Application of Control Rods for Passively Suppressing Cross-Flow VIV of an Inclined Flexible Cylinder

Figure 4

Strain response characteristic of the vertical flexible cylinder (α = 0°) without and with control rods undergoing vortex shedding at U = 0.60 m/s (the first column presents time history of strain signals ((a), (c)) and the second column presents response spectra ((b), (d))).

(a)

(b)

(c)

(d)