STREAMLINED BODY AND APPARATUS FOR SUPPRESSING VIBRATION OF EXTERIOR-ENCLOSED CONSTRUCTION, AND METHOD FOR HOISTING TOWER BARREL

摘要

Provided are a streamlined body (200) and an apparatus for suppressing the vibration of an exterior-enclosed construction, and a method for hoisting a tower barrel (100). The streamlined body (200) surrounds an exterior-enclosed construction, and the streamlined body has a streamlined front edge (201). The front edge (201) can face an incoming upwind flow, so that the incoming upwind flow forms a positive attack angle and/or a negative attack angle. By surrounding the exterior-enclosed construction with the streamlined body (200), when the upwind incoming flow flows around the exterior-enclosed construction to come into contact with the streamlined body (200), a change in the aerodynamic configuration is obtained, and an aerodynamic coefficient C becomes smaller, thus reducing the vibration. The direction and path of an airflow change, disrupting the correlation of an upwind airflow near the streamlined body (200) and disrupting the consistency of the frequencies of airflow vortex shedding on the streamlined body (200) and in other positions, thereby weakening their combined action, reducing or preventing a vortex-induced vibration response when a flow surrounding a boundary layer on an outer surface of the exterior-enclosed construction is detached, and also preventing the vortex-induced vibration of the exterior-enclosed construction.