Author(s)

K. Fujita, A. Shintani and M. Ono

Abstract

The stability of a thin cylindrical shell subjected to axial leakage flow is presented. The analytical model of a cylindrical shell is composed of the inner thin shell and the outer rigid one. We derived the added mass, added damping and added stiffness due to the unsteady fluid forces acting on the thin cylindrical shell subjected to axial leakage flow. The coupled equations between a shell and a fluid in narrow clearance are obtained by using the Donnell's shell theory and the Navier-Stokes equation. As the vibrational characteristics of a thin cylindrical shell, the axisymmetric (ring-mode) vi- bration, the lateral (beam-like) vibration and the circumferential (ovaling) vibration are classified. The effect of the axial leakage flow on the unstable phenomena of a thin cylindrical sh

Keywords