層流中の片持ち形式スタジアム屋根のフラッタ(構造・材料系)  [in Japanese] Flutter of cantilevered stadium roofs in a smooth flow  [in Japanese]

Models of cantilevered stadium roofs were designed and made. Their dynamic characteristics were measured. Then, characteristics of their dynamic response in a smooth flow were investigated. It was confirmed that flutter occur even to the heavy models in a smooth flow. The onset non-dimensional flow velocity Uo/(foa) was about 6. Characteristics of wake were also investigated. A spectral peak appeared at the natural frequency, when the flutter was occurring, but did not when the flutter was not. This suggests that the flutter is probably associated with vortices induced by oscillation.