Sieve hole air-jetting vortex-induced vibration suppression device and method

The invention relates to a sieve hole air-jetting vortex-induced vibration suppression device and method. The sieve hole air-jetting vortex-induced vibration suppression device is characterized by comprising an air injection pipe, a U-shaped flow guide bent pipe, a bottom air exhaust sieve pipe, an air exhaust sieve pipe, a top air exhaust sieve pipe, an air distribution plate, a base plate and a top plate, wherein the air exhaust sieve pipe is arranged outside a water isolation pipe in a sleeved mode, the air injection pipe leads high-pressure air flow into an annular space between the air exhaust sieve pipe and the water isolation pipe through the U-shaped flow guide bent pipe, the air flow flows out from air exhaust holes in the air exhaust sieve pipe, a seawater streaming boundary layer on the surface of a pipeline is damaged, formation of vortexes of the tail of the pipeline is interfered, and vortex-induced vibration is effectively suppressed. The sieve hole air-jetting vortex-induced vibration suppression device and method can deal with flow in different directions, is not corroded or damaged easily, is put in along with the water isolation pipe in the on-site construction process, does not affect the normal construction process, can be recycled after construction, and saves cost.