623 振動モードの切替えによる斜張橋斜材ケーブルの制振方法に関する研究 : パラメータの設計法(流動励起振動の制振とその利用)(OS.17 : 流体関連振動のダイナミクスと制御)

概要

論文の詳細を見る
Vibrations of stay cables are often induced by wind due to aerodynamic instability. The authors developed a new countermeasure against such vibrations by changing vibration modes using permanent magnet and its effectiveness has been verified both theoretically and experimentally. In this paper, a parameter design method which gives us possible condition for suppressing vibrations is proposed. The design parameters are obtained by a relatively facile analysis considering only an aerodynamically unstable vibration mode with an "effective aerodynamic damping ratio". This new concept for the damping ratio is introduced to take account of the effect of stable mode vibration energy. Finally, it is confirmed that the design conditions calculated from this method agree well with wind tunnel test results.
社団法人日本機械学会の論文
2001-08-03