Streamlined body and streamlined apparatus for suppressing vibrations of enclosure and method for hoisting tower

摘要

#$%^&*AU2018264071A120190328.pdf#####ABSTRACT A streamlined body, apparatus for suppressing vibrations of an enclosure, and a method for hoisting a tower are provided. The streamlined body surrounds the enclosure, and the 5 streamlined body has a streamlined leading edge. The leading edge can faces towards the upwind incoming flow, to allow the upwind incoming flow to form a positive attack angle and/or a negative attack angle. In this solution, the enclosure is surrounded by the streamlined body, and when the upwind incoming flow flows around the enclosure to come into contact with the streamlined body, the aerodynamic configuration is changed, and the aerodynamic 10 coefficient C becomes small, thus the vibrations are reduced. Moreover, the direction and path of the airflow are changed, which disrupts the correlation of the upwind incoming flow near the streamlined body, and disrupts the consistence of frequencies of vortex shedding of the airflow at the streamlined body and other positions, thus weakening their co-action, reducing or preventing the vortex-induced resonance response when bypass flow detachment 15 occurs in the boundary layer at the outer surface of the enclosure, thereby preventing the vibrations induced by the vortexes at the enclosure.