PATTERNS OF CABLE VIV SUPPRESSION BASED ON THE FLUID-STRUCTURE INTERACTION

The vortex-induced vibration(VIV) will accelerate the fatigue failure of the cables and reduce the life and threaten the safety of the SFT(submerged floating tunnel). In this paper, the effect of the controlling VIV of cables with the fairing or the three control rods is analyzed by using the numerical method based on the fluid-structure interaction. The influence of different cable tilt angles and flow directions on the vibration of the cables is explored with regard to the vortex-induced vibration suppression of the marine riser. The results show that the two proposed methods have a good vibration control effect along the flow direction. The fairing has a more prominent effect and the vibration suppression effect of the three control rods will be greatly improved if the cables are tilted. The analysis also demonstrates that the three control rods may partly increase the VIV of the cables when the flow direction changes. In summary, the fairing has a better adaptability.