Abstract
The fundamental characteristics of fluid restraint of the annular region in coaxial circular cylinders were clarified. The effects of gap width, axial length, leakage from the end, etc., on the added mass coefficients and added damping coefficient of two types of circular cylinders were evaluated by both an experiment utilizing one-degree of freedom cylindrical models and analysis. The method for evaluating the vibration characteristics of a beam which has fluid restraint was investigated, and a convenient formulation for estimating the damping ratio was derived.
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