Active control of super-tall structure vibrations under wind action by a boundary-layer control method

Abstract

The authors have been developing active control methods for suppressing the aerodynamic vibrations of super-tall structures, like pylons of super-long bridges and super-tall buildings, which will be constructed in the next century. Boundary-layer control by rotating cylinders at the leading edge is treated as an active control method for suppressing aerodynamic vibrations. Previous wind tunnel tests conducted by using a two-dimensional square prism gave good results for suppression of the aerodynamic response due to vortex-excited vibration and galloping. On the basis of the two-dimensional wind tunnel test results, three dimensional wind tunnel tests were conducted. The experimental results had a relatively good agreement between two and three dimensional tests.