Riser vortex inducting vibration suppression device with rough undulating surface

The utility model relates to a riser vortex inducting vibration suppression device with a rough undulating surface. The riser vortex inducting vibration suppression device with the rough undulating surface is formed by combining a plurality of elementary units in series along the axis direction of a marine riser, wherein each elementary unit is composed of two semi-symmetric plastic undulating semicircular cylinders, each undulating semicircular cylinder is of solid structure, the outer surface of each undulating semicircular cylinder is in rolling wave shape, and semi-ellipsoid bulges and semi-ellipsoid pits are evenly distributed along the circumferential direction of the wave crest and the wave trough of the wave-shaped outer surface of each undulating semicircular cylinder. According to the riser vortex inducting vibration suppression device with the rough undulating surface, the wave-shaped surface of the riser vortex inducting vibration suppression device enables streaming to be in three-dimensional mixing mode, flow fields close to the wall of the riser vortex-induced vibration suppression device is perturbed due to the fact that the surface of the riser vortex-induced vibration suppression device is rough, formation and development of vortexes are effectively suppressed under the influence of the rough undulating surface of the riser vortex-induced vibration suppression device, and accordingly vortex inducting vibration suppression is achieved. The riser vortex inducting vibration suppression device with the rough undulating surface can deal with incoming flows from different directions, is low in cost and difficult to corrode and damage, and can be reused.