Method for determining locking state of vortex-induced motion of stand column type platform

The invention discloses a method for determining a locking state of vortex-induced motion of a column type platform, and relates to the technical field of ocean deepwater platforms, and the technical scheme comprises the following steps: S1, calculating a mass ratio according to basic design data of the column type platform; s2, according to the hydrological data of the service sea area and the basic design data of the stand column type platform, reducing speeds at different flow speeds are calculated; s3, determining a dynamic additional quality coefficient according to the reduction speed and the basic design data; s4, calculating the Re range of vortex-induced motion according to the hydrological data of the service sea area and the basic design data of the stand column type platform; s5, St is determined according to the Re of vortex-induced motion of the stand column type platform in the service period; s6, determining the minimum reduction speed of the vortex-induced motion of the column type platform e