606 薄肉円筒殼の円周方向振動に関する軸方向すきま流励起振動(すきま流れ及び平行流による振動と制御)(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
In this paper, the stability of the thin cylindrical shell subjected to axial leakage flow is reported. Following the former papers, we focus on the circumferential (ovaling) vibration of the shell as the next step of the axisymmetric vibration (ring mode) and lateral vibration (beam-like vibration). Equations for a shell and a fluid are described by ones of the thin cylindrical shell and Navier-Stokes ones respectively, and both equations are coupled. That is, the added mass, added damping and added stiffness are described by considering unsteady pressure acting on the shell. The relation between the axial velocity and the unstable phenomena are clarified. The numerical simulations are shown as parameter study.
2001-08-03