STUDY ON VIBRATION CHARACTER FOR A CANTILEVER TUBE IN WATER CONFINED BY CONCENTRIC TUBE
ZHANG WENQING (Xi'an Jiaotong University)
In this paper vibrational character of cantilever tube in water confined by concentric tube is investigated. Formulas for determining the added mass factor and viscous damping factor are derived by solving two dimention Navier-Stokes equations. The experimental study of added mass factor and viscous damping factor for cantilever tube confined in water by concentric tube was conducted in order to verify the result of theoretical analysis. The relationships of added mass factor and viscous damping factor with ratio of internal diameter of outer tube and external diameter of contilever tube, natural frequency of cantilever of confined concetric tube in water and Stokes number have been istablished.