Floating body device for suppressing vibration of tower

摘要

#$%^&*AU2018222889A120190328.pdf#####ABSTRACT A floating body device for suppressing vibration of enclosure includes a floating body surrounding the enclosure and an excitation device which can excite the floating body to float up and down. The excitation device includes a tether connected to the floating body to prevent 5 the floating body from falling off from the enclosure. When the floating body floats up and down, an airflow boundary layer on an outer wall of a tower can be destroyed, and a cause of vortex-induced vibration can be directly suppressed. In addition, a change of an aerodynamic configuration is obtained, to decrease an aerodynamic coefficient C (decrease a vibration amplitude in a downwind direction), and also reduce an amplitude A of a vortex-induced 10 resonance. The up and down floating of the floating body disrupts both upper and lower sections of a nearby flow field, thus disturbing the correlation of upwind airflow near the floating body, which in turn disturbs the consistency of an airflow vortex shedding frequency between the floating body and other positions, thus weakening a combined action thereof, thereby preventing the vortex induced vibration of the tower.