Vortex induced vibration suppression device with axial direction slip rotary impeller pair and method

Abstract

The invention relates to a vortex induced vibration suppression device with an axial direction slip rotary impeller pair, and a method; the vortex induced vibration suppression device comprises an upper rotary member, a lower rotary member, a sleeve, two fixed rings and four springs; slider rails are arranged on the outer wall of the sleeve; the rotary members can slide on the slide rails; the outer peripheral surface of the rotary member is provided with arc-shaped blades capable of freely rotating under water impact; the springs can control the distance between the two rotary members; the fixed rings can limit the slip of the rotary members; the blades and springs can affect seawater streaming, can break a boundary layer, thus providing passive vortex induced vibration control effect; the rotating blades and the axial slip rotary members can deeply damage a vertical tube wall surface streaming boundary layer, thus providing active vortex induced vibration control effect; the active and passive vortex induced vibration suppression functions can be combined.

Description

technical field [0001] The invention belongs to the technical field of laying marine riser facilities, and in particular relates to a vortex-induced vibration suppression device and method for installing an axially sliding rotating impeller pair. Background technique [0002] Most of the key structures in the field of marine engineering are cylindrical structures, such as marine risers, anchor chains, mooring cables, power cables, etc. With the increasing development of deep sea resources, safe and stable large length-to-diameter ratio riser systems and mooring systems are the guarantee for normal development and production, which requires in-depth hydrodynamic research on cylindrical structures to master their Fluid-structure interaction characteristics in complex marine environments. Cylindrical structures represented by marine risers will undergo vortex-induced vibration under the action of ocean currents, thereby inducing structural fatigue damage. In recent years, inc...

AI Technical Summary

Problems solved by technology

Existing vortex-induced vibration suppression devices mainly start with changing the separation point of the boundary layer, such as various passive suppression devices that change the shape of structures around the flow.

There are also some methods of injecting external energy into the boundary layer, but due to the consumption of additional energy, there are greater difficulties in actual use

Images