Abstract
When wind flows through slats of a blind at the window, sometimes self-excited torsional vibration occurs with a large noise. This report investigates effects of some parameters on the vibration by using an experimental apparatus consisting of two acrylic plates hung by metal wires. Each plate has two degrees of freedom corresponding to translational and torsional motions. Experimental results show that torsional motion is predominantly observed when self-excited vibration occurs, and that bigger vibration is induced when the two plates are located closer to each other. In addition, we show that vortices leave from the plates by visualizing flow.
