随行波微结构表面圆柱涡激振动的抑振研究

Vortex-induced vibration (VIV) easily causes structural instability or fatigue damage to non-streamlined structures. Considering this problem, a new scheme for VIV suppression of cylinders with traveling wave micro-structure surface is proposed in this paper. The VIV responses of cylinder with conventional surface and a cylinder with traveling wave micro-structure surface are analyzed by transient computational fluid dynamics (CFD), with Reynolds number of 10 000. The traveling wave micro-structure surface parameters are defined, and the Newmark-β method is used to solve the single-degree-of-freedom vibration equation of cylinder, and compile the user-defined function (UDF) for the CFD numerical calculation. The k-ω/SST turbulence model and SIMPLEC algorithm are applied in the calculation, and the vibration process of cylinder is simulated using the dynamic mesh technique. The results show that compared with the cylinder with conventional surface, the cylinder with a traveling wave micro-structure surface has a remarkable VIV suppression effect, and the amplitude is reduced by about 92.97%. The result of this study can provide references for VIV suppression of cylindrical or tubular structures.